Linear Applications Handbook

A Guide to Linear Circuit Design

Linear Technology Corporation

Linear Applications Handbook A Guide to Linear Circuit Design




a. Life support devices or systems are devices or systems which (1) are intended for surgical implant into the body, or (2) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user.

b. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.

Information furnished herein by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits, as described herein, will not infringe on existing patent rights.

Linear Technology Corporation 1630 McCarthy Blvd. Milpitas,CA95035 (408)432-1900 © Linear Technotogv Coipoialion 1990 Pimted m USA



Why Write Applications?

This is seemingly an odd and unlikely way to begin an applications publica- tion, but it is a valid question. As such, the components of the decision to produce this book are worth reviewing.

Producing linear application material requires an intensive, extended effort. Development costs for worthwhile material are extraordinarily high, absorb- ing substantial amounts of engineering time and money. Further, these same resources could be directed towards product development, the contribution of which is much more easily measured at the corporate coffers. These are seri- ous issues in any environment, but are particularly critical in a rapidly growing company, where resources must be thoughtfully allocated.

Linear Technology Corporation's commitment to a concerted applications ef- fort was made despite these concerns. Specifically, the nature of linear circuit design is so diverse, the devices so sophisticated, and user requirements so demanding that designers require (or at least welcome) assistance. Ultimately, the procurement and use of linear ICs is tied to the user's ability to solve the problems confronting them. Anything which enhances this ability, in both specific and general cases, obviously benefits user and vendor.

This is a very simple but powerful argument, and is the basis of LTC's commit- ment to applications. Additional benefits include occasional new product concepts and a way to test products under "real world" conditions, but the basic justification is as described.

Traditionally, application work has involved reviewing considerations for suc- cessful use of a specific product. Additionally, basic circuit suggestions or concepts are sometimes offered. Although this approach is useful and neces- sary, some expansion is possible. LTC's applications are centered on de- tailed, systems-oriented circuits, (hopefully) similar to the types of designs users are working with. There is a broad tutorial content, reflected in the form of frequent text digressions and liberal use of graphics. Discussions of trade- offs, options and techniques are emphasized, as opposed to brief descrip- tions of circuit operation. Many of the application notes contain appended sections which examine related or pertinent topics in detail. Ideally, this treat- ment provides enough background to allow readers to modify the circuits presented into solutions to their specific problems.

Some comment about the circuit examples is appropriate. They range from relatively simple to quite complex and sophisticated. Emphasis is on high performance, in keeping with the capabilities of LTC's products and the mar- ket we serve. The circuit's primary function is to serve as a catalyst-once the reader has started thinking, the material has accomplished its mission.



Substantial effort has been expended in working out and documenting these circuits, but they are not finessed to the highest possible degree. All of the cir- cuits have been breadboarded and bench-tested at the prototype level. Specifications and performance levels quoted in the text represent measured and extrapolated data derived from the breadboard prototype. The volume of material generated prohibits formal worst-case review or tolerance analysis for production. Additionally, despite our best efforts, errors of various sorts do occasionally creep in along the way to publication. Because of these con- siderations, readers should contact LTC when preparing to use a circuit in a production situation. This allows us to advise on specific areas of the circuit which may require a "second look" before going to production. Updates, sug- gested modifications and just plain mistakes can also be discussed at this time.

We have received numerous comments and questions since this books first (1987) edition. The most frequent query concerns topic selection. The topics presented are survivors of a selection process involving a number of disparate considerations. These include reader needs, suitability for magazine publica- tion, LTC's short and long term commercial aspirations, time constraints and author interest in doing the work. Additionally, we seek a 10 year useful life- time for application notes. This generally precludes narrowly focused effort towards individual IC's. Topics are broad, with a tutorial and design emphasis that (ideally) reflects the readers long term interests. While the circuits pre- sented unabashedly favor our products, they must be conceptually applicable to succeeding generations of devices (hopefully ours). Similarly, the circuits should represent a relatively complete and interdisciplinary approach to solv- ing the problem at hand. Solving a problem is usually the readers/customers overwhelming motivation. The selection and integration of tools and methods towards this end is the priority. For this reason the examples and accompany- ing text are as complete and practical as possible. This may necessitate effort in areas where we have no direct economic stake, e.g., the software presented in AN28 or the magnetics developed for AN25, AN29 and AN35. In some cir- cumstances this policy necessitates use of competitors products (horrors!) where appropriate. Such gallant objectivity is not without calculation; the goal is to have readers associate LTC with realistic advice, useful products and satisfactory results, regardless of the problem encountered. The long term task is establishing and maintaining credibility and customer loyalty. If unabused, these are powerful sales tools. Maintaining this stance involves a significant amount of negotiation and compromise with issues and individu- als, but the results are usually favorable for everyone.

A second common question addresses the time and effort required to produce an individual application note. The work invested varies considerably. AN29 required a year to complete. It involved endless laboratory hours, close coor- dination with our magnetics supplier and over 300 changes, corrections,


band-aids and tweaks before the manuscript was finally released. Conversely, AN31 and AN32 were finished (perhaps theraputically) within three weeks. In all cases the actual writing time is a miniscule percentage of the total work time. AN29's year of effort was written up in a week. AN31 and AN32 required less than five hours.

Another common question involves our photographic documentation. We have received hundreds of inquiries requesting details on instrumentation, particularly for multi-trace oscilloscope photography. Almost all photo- graphic work is done with four (Tektronix 547 with a four trace 1A4 plug-in) or eight (Tektronix 556 with two 1A4 plug-ins) trace oscilloscopes. Photographs with more than eight traces utilize multiple exposure or splicing techniques. Tektronix C-12 and C-27 cameras are used on both instruments, with modified graticule illumination on the 556. AN29's Appendix F provides additional discussion.

A final recurring question concerns use of this book as text in university level courses. We certainly welcome this, and find it rewarding. However, we can- not develop, or collaborate in the development of, supplementary material for problem sets and laboratory manuals. This simply strays too far from our charter.

Some significant additions since the 1987 edition are "Design Notes" and the open format used in AN26, AN27 and AN36. "Design Notes" provide a way to cover a specific topic in concise form and get the material to the reader quickly. Most of these notes are stand-alone efforts. In some cases they are excerpted from application note work in progress and fed directly to print. When the application note becomes available the material appears in unab- breviated form. Another change is the format used for AN26, AN27 and AN36. The segmented approach allows convenient updating and additions at some sacrifice in text flow. Subjects amenable to this treatment avoid the disruptive surgery required to revise a conventional manuscript.

In response to reader requests we have included macromodels of compo- nents. The present list includes 28 IC's, all amplifiers. This inventory will grow and diversify into other part types. Significant effort has gone towards making these models realistic and usable. They are intended as powerful adjunct tools in the design process, and should not be abused. More specifically, they are meant to augment actual breadboards, not eliminate them. Bypassing breadboarding is an extraordinarily hazardous process with a high fatality rate, even among veteran designers. Although these macromodels cannot eliminate the cold realities involved in making something work, they ease the task and save time. As such, we encourage readers to use them and invite your comments.

Also new is the inclusion of application notes from other sources. These notes, found in the "Reference Reading" section, have proven particularly useful to readers. The information they contain is pertinent to problem areas that concern our readers. As such, they merit inclusion. If this approach is well received this section will be enlarged in succeeding editions. The cooperation of the contributors is appreciated.

Finally, the appearance of new authors is applauded, particularly by the un- dersigned. There is plenty of work to do and many pens (and probes) ease the task while broadening perspective.


A number of people with a wide variety of talents contributed to this book. LTC's senior management, most notably R. Swanson, B. Dobkin and B. Ehrsam, provided continuous support and encouragement. M. J. Yuhas showed special skill in converting the worst form of "chicken tracks" into legi- ble, expertly prepared and edited manuscripts and is due special recognition.

B. Essaff prepared some beautiful breadboards (until I corrupted his construc- tion technique) and was a major contributor to the lab work. C. Nelson, T. Redfern, G. Erdi, W. Rempfer, D. O'Neill, N. Sevastopoulos, and B. Huffman contributed useful comments, most of which were not diluted by tact.

In the final analysis, however, the ultimate acknowledgement must be re- served for our customers, who are both the beneficiaries and benefactors of this book. Their requests and requirements define our work, and hence this book. If we have listened carefully, they should be pleased.


James M.Williams November, 1989 Milpitas, California






AN1 Understanding and Applying the LT1005 Multifunction Regulator AN1-1

AN2 Performance Enhancement Techniques for Three-Terminal Regulators AN2-1

AN3 Applications for a Switched-Capacitor Instrumentation Building Block AN3-1

AN4 Applications for a New Power Buffer AN4-1

AN5 Thermal Techniques in Measurement and Control Circuitry AN5-1

AN6 Applications of New Precision Op Amps AN6-1

AN7 Some Techniques for Direct Digitization of Transducer Outputs AN7-1

AN8 Power Conditioning Techniques for Batteries AN8-1

AN9 Application Considerations and Circuits for a New Chopper-Stabilized Op Amp AN9-1

AN10 Methods for Measuring Op Amp Settling Time AN10-1

AN11 Designing Linear Circuits for 5V Operation AN11-1

AN12 Circuit Techniques for Clock Sources AN12-1

AN13 High Speed Comparator Techniques AN13-1

AN14 Designs for High Performance Voltage-to-Frequency Converters AN14-1

AN15 Circuitry for Single Cell Operation AN15-1

AN16 Unique IC Buffer Enhances Op Amp Designs, Tames Fast Amplifiers AN16-1

AN17 Considerations for Successive Approximation A- D Converters AN17-1

AN18 Power Gain Stages for Monolithic Amplifiers AN18-1

AN19 LT1070 Design Manual AN19-1

AN20 Application Considerations for an Instrumentation Low-Pass Filter AN20-1

AN21 Composite Amplifiers AN21-1

AN22 A Monolithic IC for 100MHz RMS-DC Conversion AN22-1

AN23 Micropower Circuits for Signal Conditioning AN23-1

AN24 Unique Applications for the LTC1062 Low-Pass Filter AN24-1

AN25 Switching Regulators for Poets AN25-1

AN26A Interfacing the LTC1090 to the 8051 MCU AN26A-1

AN26B Interfacing the LTC1090 to the MC68HC05 MCU AN26B-1

AN26C Interfacing the LTC1090 to the HD63705VO MCU AN26C-1

AN26D Interfacing the LTC1090 to the COP820C MCU AN26D-1

AN26E Interfacing the LTC1090 to the TMS7742 MCU AN26E-1

AN26F Interfacing the LTC1090 to the COP402N MCU AN26F-1

AN26G Interfacingthe LTC1091 tothe8051 MCU AN26G-1

AN26H Interfacing the LTC1091 to the 68HC05 MCU AN26H-1

AN26I Interfacing the LTC1091 to the COP820C MCU AN26I-1

AN26J Interfacing the LTC1091 to the TMS7742 MCU AN26J-1

AN26K Interfacing the LTC1091 to the COP402N MCU AN26K-1

AN26L Interfacing the LTC1091 to the HD63705V0 MCU AN26L-1

AN26M Interfacing the LTC1090 to the TMS320C25 DSP AN26M-1

AN26N Interfacing the LTC1091/92 to the TMS320C25 DSP AN26N-1

AN260 Interfacing the LTC1090 to the Z-80MPU AN260-1

AN26P Interfacing the LTC1090 to the HD64180 AN26P-1

AN26Q Interfacing the LTC1091 to the HD64180 AN26Q-1

AN26R Interfacing the LTC1094 to a Parallel Bus AN26R-1

AN27A A Simple Method of Designing Multiple Order All Pole Bandpass Filters by Cascading 2nd Order Sections AN27A-1

AN28 Thermocouple Measurement AN28-1

6 rruum



AN29 Some Thoughts on DC-DC Converters AN29-1

AN30 Switching Regulator Circuit Collection AN30-1

AN31 Linear Circuits for Digital Systems AN31-1

AN32 High Efficiency Linear Regulators AN32-1

AN33 Converting Light to Digits: LTC1099 Half Flash 8-Bit A/D Converter Digitizes Photodiode Array AN33-1

AN34 LTC1099 Enables PC Based Data Acquisition Board to Operate DC-20kHz AN34-1

AN35 Step Down Switching Regulators AN35-1

AN36A Interfacing the LTC1290 to the 8051 MCU AN36A-1

AN36B Interfacing the LTC1290 to the MC68HC05 MCU AN36B-1

AN36C Interfacing the LTC1290/LTC1090 to the TMS370 MCU AN36C-1

AN36D Interfacing the LTC1290 to the COP820C MCU AN36D-1

AN36E Interfacing the LTC1290 to theTMS7742 MGU AN36E-1

AN36F Interfacing the LTC1290 to the COP402N MCU AN36F-1

AN360 Interfacing the LTC1290 to the Z-80MPU AN360-1

AN37 Fast Charge Circuits for NiCad Batteries AN37-1

AN38 FilterCAD User's Manual, Version 1.00 AN38-1

AN39 Parasitic Capacitance Effects in Step-Up Transformer Design AN39-1

AN40 Take the Mystery Out of the Switched Capacitor Filter: The System Designer's Filter Compendium AN40-1


DN1 New Data Acquisition Systems Communicate with Microprocessors Over 4 Wires » DN1-1

DN2 Sampling of Signals for Digital Filtering and Gated Measurements DN2-1

DN3 Operational Amplifier Selection Guide for Optimum Noise Performance DN3-1

DN4 New Developments in RS232 Interfaces DN4-1

DN5 Temperature Measurement Using the LTC1090/91/92 Series of Data Acquisition Systems DN5-1

DN6 Operational Amplifier Selection Guide for Optimum Noise Performance DN6-1

DN7 DC Accurate Filter Eases PLL Design DN7-1

DN8 Inductor Selection for LT1070 Switching Regulators DN8-1

ON9 Chopper Amplifiers Complement a DC Accurate Low-Pass Filter DN9-1

DN10 Electrically Isolating Data Acquisition Systems DN10-1

DN11 Achieving Microamp Quiescent Current in Switching Regulators DN11-1

DN12 AnLT1013andLT1014OpAmpSPICEMacromodel DN12-1

DN13 Closed Loop Control with the LTC1290 Series of Data Acquisition Systems DN13-1

DN14 Extending the Applications of 5V Powered RS232 Transceivers DN14-1

DN15 Noise Calculations in Op Amp Circuits DN15-1

DN16 Switched-Capacitor Low-Pass Filters for Anti-Aliasing Applications DN16-1

DN17 Programming Pulse Generators for Flash Memories DN17-1

DN18 A Battery Powered Lap Top Computer Power Supply DN18-1

DN19 A Two Wire Isolated and Powered 10-Bit Data Acquisition System DN19-1

DN20 Hex Level Shift Shrinks Board Space DN20-1

DN21 Floating Input Extends Regulator Capabilities DN21-1

DN22 New 12-Bit Data Acquisition Systems Communicate with Microprocessors Over 4 Wires DN22-1

DN23 Micropower, Single Supply Applications: (1) A Self-Biased, Buffered Reference,

(2) Megaohm Input Impedance Difference Amplifier DN23-1

DN24 Complex Data Acquisition System Uses Few Components DN24-1

DN25 A Single Amplifier, Precision High Voltage Instrument Amp DN25-1

DN26 Auto-Zeroing A/D Offset Voltage DN26-1

DN27 Design Considerations for RS232 Interfaces DN27-1

DN28 ASPICEOpAmpMacromodelfortheLT1012 DN28-1



DN29 A Single Supply RS232 Interface for Bipolar A to D Converters DN29-1

DN30 RS232 Transceiver with Automatic Power Shutdown Control DN30-1

DN31 Isolated Power Supplies for Local Area Networks DN31-1

DN32 A Simple Ultra-Low Dropout Regulator DN32-1


LM101A 1

LM107 2

LM108 3

LM108A 4

LM 118 5

LM308 6

LM308A 7

LT1001 8

LT1008 10

LT1012 11

LT1013/LT1014 12

LT1028 13

LT1037 14

LT1055 15

LT1056 16

LT1057 17

LT1078 18

LT1097 19

LT1101 20

LT1115 21

LT1178 22

LT 1 1 8A , , , 23

OP-05 24

OP-07 25

OP-27 26

OP-37 27

OP-97 •■ 28


Understanding Interference-Type Noise RR1-1

Shielding and Guarding RR2-1

Mounting Considerations for Power Semiconductors RR3-1





Linear Technology has made a major effort to address a wide variety of topics. The number of application prob- lems solvable with either circuit techniques or new linear integrated circuits continues to grow at a progressive rate. This comprehensive index includes Application Notes (AN1-AN40), Design Notes (DN1-DN32) and Data Sheet circuits (through March 1990).


A-D— See Converter

ACCELEROMETER-See Signal Conditioning

ACOUSTIC THERMOMETER-See Signal Conditioning- Temperature


Absolute Value

Precision Absolute Value Circuit: LT1001 DS; LT1002 DS Wide Bandwidth Absolute Value Circuit: LT1022 DS Precision Absolute Value Circuit: OP05 DS

Additional Feature Circuits DC and AC Zeroing: LF198DS Inverting Amplifier with High Input Resistance: LM108 DS Constant Gain Amplifier Over Temperature: LT1004 DS Ammeter with Six Decade Range: LT1008 DS; LT1012 DS Five Decade Kelvin-Varley Divider: LT1008 DS Input Amplifier for 4-1/2 Digit Voltmeter: LT1008 DS; LT1012 DS DC Stabilized FET Probe: LTC1052 DS

Boosted Output

Basic Boosted Op Amp (150mA): AN4, Pg. 1 Increasing Output Current (10mA-20mA): AN9, Pg. 18 Increasing Output Current and Voltage ( + 12V at 20mA): AN9, Pg. 18

1.5V Voltage Boosted Output Op Amp (0V-10V): AN15, Pg. 6

LT1010, Paralleling: AN16, Pg. 17

Fast Power Buffer(IOMHz): AN16, Pg. 20

High Current Booster (3A): AN18, Pg. 2

Output Stage (150mA): AN18, Pg.2

Ultra Fast Feed Forward Current Booster (1000V/^s, 14MHz,

200mA): AN18, Pg.3 Low Output Saturation: AN18, Pg. 4; LTC1052 DS

The index is organized so that application circuits and subject tutorials are easily found. The major categories are broken up into specialized topics to help isolate a particular application. The subject index works as follows, i.e. AN8, Pg. 8= Application Note 8 page 8; LTC1044 DS = LTC1044 Data Sheet; DN17, Pg. 1 = Design Note 17 page!

High Current Rail to Rail Output Stage (100mA): AN18, Pg. 5 Output Stage 120V Swing): AN18, Pg. 7; LT1055 DS Output Stage ( ± 150V Swing): AN18, Pg. 8 Unipolar Output, Gain Stage (1000V Swing): AN18, Pg. 9 ± 15V Powered, Bipolar Output, Voltage Gain Stage,

( + 100V Swing): AN18, Pg. 11 Paralleling for High Current: AN21, Pg. 12 Precision Amplifier Drives 500Q Load to ± 10V: LT1002 DS Precision Amplifier Drives 3000 Load to ± 10V: LT1007DS;

OP227 DS

High Output Current Op Amp: LT1022 DS; AN16, Pg. 15; LTC1052 DS

Increasing Output Current and Voltage: LTC1052 DS Butter

Fast, Stabilized FET Buffer (FET Probe): AN9, Pg. 9 Input Buffer for the LT1088: AN22, Pg. 12 Large Signal Voltage Follower: LT1001 DS Fast + 150mA Power Buffer: LT1010 DS

Clamping Techniques Precision Adjustable Dead Zone Generator: AN6, Pg. 5;

LT1001 DS; LT1002DS Precision Clamp: LM129DS


DC Stabilized Fast Amplifier (MV/^s, 300kHz FPB): AN21, Pg. 1 Fast Destabilized FET Amplifier (100V//is, 1MHz FPB):

AN21, Pg.2 Fast Precision Inverter: LH2108 DS Fast Summing Amplifier: LM108 DS Precision Inverting Amplifier: LT118 DS Fast Precision Inverter: LTC1052 DS



Current Mode

"Current Mode Feedback" Amplifier (1 MHz FPB): AN21 , Pg. 7;

AN22, Pg.12;LT1088DS "Current Mode Feedback" (Son of Godzilla Amplifier)

(3000V//JS, 25MHz FPB): AN21, Pg. 8; AN22, Pg. 13; LT1088 DS


Simple Pre-Amplifier for the Comparator: AN17, Pg. 4

"No Trims" 12 Bit Multiplying DAC Output Amplifier: LT1012 DS;

LT1022 DS; LT1055DS No V0s Adjust CMOS DAC Buffer: LTC1052 DS

Dead Zone

Dead Zone Generator: LT1 001 DS; LT1 002 DS


LT1010 Buffer: AN4, Pg.7;AN16, Pg. 1

Chopper Stabilized Op Amps: AN9, Pg. 19

Amplifier Compensation: AN10, Pg. 8

LT1010, Performance Summary: AN16, Pg. 7

Frequency Compensation: AN18, Pg. 12

Operational Amplifier Selection Guide for Optimum Noise

Performance: DN3, Pg. 1 Input Guarding: LM108 DS Input Protection: LM108DS

Advantages of Matched Dual Op Amps: LT1002 DS; OP227 DS; LT1024DS

Gain 1000 Amplifier with 0.01% DC Accuracy: LT1007 DS Achieving Picoampere/Microvolt Performance: LT1008 DS;

LT1012DS;LTC1052DS Frequency Compensation: LT1008 DS Isolating Capacative Loads: LT1010 DS High Speed Operation: LT1055 DS Phase Reversal Protection: LT1055 DS Isolating Large Capacitive Loads: LT118 DS Offset Voltage Adjustment: OP27 DS

Divider Analog Divider: LT1 057 DS Divideby3: LTC1043 DS Divideby 4:LTC1043 DS Divide by 2: LTC1043 DS


Precision High Speed Op Amp (1000V/^s): AN6, Pg. 7; LT1001 DS Stabilized FET Buffer (FET Probe): AN9, Pg. 9

Fast Destabilized FET Amplifier (lOOV/jiS, 1 MHz FPB): AN21,Pg.2

"Current Mode Feedback" Amplifier (1 MHz FPB): AN21, Pg. 7;

AN22,Pg.12;LT1088DS "Current Mode Feedback" Amplifier (3000V/*is, 25MHz FPB):

AN21, Pg. 8; AN22, Pg. 13; LT1088 DS Fast Precision Inverter: LH2108 DS Fast Summing Amplifier: LM108 DS Fast Precision Inverters: LT1008 DS; LT1012 DS


Fast Fiber Optic Receiver (10M Hz): AN13, Pg. 23


+ 5V Precision Instrumentation Amplifier: AN3, Pg. 2; LT1006DS

Chopper-Stabilized Instrumentation Amplifier: AN3,

Pg.3;LTC1043DS Instrumentation Amplifier with 300V Common Mode Range:

AN6, Pg.2;LT1001 DS Ultra Precision Instrumentation Amplifier: AN9, Pg. 6 Precision Instrumentation Amplifier: AN11, Pg. 6 Ultra Precision Instrumentation Amplifier: AN11, Pg. 6;

LTC1043 DS

A Single Amplifier, Precision High Voltage Instrumentation

Amplifier: DN25, Pg. 1 Differential Input Instrumentation Amplifier: LM108 DS Three Op Amp Instrumentation Amplifier: LT1002 DS;

LT1024 DS; OP05 DS Two Op Amp Instrumentation Amplifier: LT1002 DS; LT1024 DS;


Instrumentation Amplifier with ± 100V Common Mode Range: LT1012DS

5V Powered Precision Instrumentation Amplifier: LT1013 DS 5V Single Supply Dual Instrumentation Amplifier: LT1013 DS Triple Op Amp Instrumentation Amplifier with Bias Current

Cancellation: LT1013DS Low Noise, Wide Bandwidth Instrumentation Amplifier:


High Performance Instrumentation Amplifier: LT1051 DS Instrumentation Amplifier with Shield Driver: LT1058 DS Precision, Micropower, Single Supply Instrumentation Amplifier: LT1 101 DS



High Speed, Precision, JFET Input Instrumentation Amplifier: LT1102DS

5V Powered Ultra Precision Instrumentation Amplifier: LTC1052DS

Precision, Chopper Stabilized, Single Supply Instrumentation

Amplifier: LTC1100DS Single Supply, Chopper Stabilized Instrumentation Amplifier:


Integrator with Programmable Reset Level: LF198 DS Low Drift Integrator with Reset: LM108 DS

Ultra Precision Voltage Inverter: LTC1043 DS Isolation

Precision Isolation Amplifier (250V Iso. - 0.03% Ace): AN9,Pg.8;LTC1052DS Lock In

Lock In Amplifier: AN3, Pg. 4; LTC1043 DS


Logarithmic Amplifier: LT1008 DS; LT1012 DS


Destabilized, Ultra Low Noise (V0s=5fiV, 1.1nV/Hz):

AN21,Pg.10;LT1028DS Paralleling for Low Noise: AN21, Pg. 11; LT1028 DS; LT1058 DS Ultra Low Noise, Low Drift Amplifier: LTC1052 DS

Micropower Meter Amplifier: LM10DS Microphone: LM10DS Transducer Amplifier: LM10 DS Precision, Micropower, Single Supply Instrumentation

Amplifier: LT1 101 DS Micropower, Single Supply Op Amp: LT1 178 DS

Analog Multiplier with 0.01% Accuracy: AN3, Pg. 14

Resistor Multiplier: LT1012 DS

Analog Multiplier/Divider: LTC1040 DS

Precision Multiply by 3: LTC1043 DS

Multiply by 2: LTC1043DS

Precision Multiply by 4: LTC1043 DS

Analog Multiplier: LTC1099 DS


Noise Calculations in Op Amp Circuits: DN15, Pg. 1 Noise Testing: OP27 DS


Precision Rectifier: LM101 DS 100kHz Precision Rectifier: LT1011 DS


RF Leveling Loop: AN22, Pg. 14; LT1088 DS

Sample and Hold

Fast Sample-Hold, 2jis 0.01 %, with Hold Step Compensation: AN4,Pg.5

Sample and Hold (200ns-0.01 %): AN13, Pg. 15; LT1016DS

Sample and Hold (10ns): AN13, Pg. 18

1.5V Powered Sample and Hold: AN15, Pg. 3

1.5V Fast Sample and Hold (125/is, 0.1 %): AN15, Pg. 4

Micropower Sample and Hold: AN23, Pg. 10; LT1006 DS

Basic Sample and Hold: LF198 DS

Differential Hold: LF198DS

Fast Acquisition, Low Droop Sample and Hold: LF198 DS Output Holds at Average of Sample Input: LF198 DS Sample and Difference Circuit: LF198 DS X1000 Sample and Hold: LF198DS Sample and Hold: LM108 DS Fast, Precision Sample and Hold: LT1022 DS 5/ts Sample and Hold with Zero Hold Step: LT119A DS Quad Single 5V Supply, Low Hold Step, Sample and Hold: LTC1043 DS

Infinite Hold Time Sample and Hold: LTC1099 DS

Settling Time Settling Time Test Circuit: AN10, Pg. 1 Improved Settling Time Test Circuit: AN10, Pg. 2; LT1055 DS Circuit for Testing Followers: AN10, Pg. 3 Sampling Switch for Ultra Precision Settling Time Measurement: AN10, Pg. 4

Track and Hold Fast Track and Hold:AN13, Pg. 16 Track and Hold (5MHz):AN16, Pg. 19

Variable Gain

Variable Gain Amplifier: AN3, Pg. 5; LTC1043 DS




Video Line Driving Amplifier: AN4, Pg. 3 Video Distribution Amplifier: AN4, Pg. 4 DC Stabilized Fast Amplifier (32MHz): AN21, Pg. 5

Wideband- See Also Amplifier-Fast Feed Forward, DC Stabilized Buffer: AN4, Pg. 2 LT1010 Wideband Amplifier: AN16, Pg. 17 Wideband FET Input Stabilized Buffer: AN21, Pg. 3 Gain Trimmable Wideband FET Amplifier: AN21, Pg. 4 Destabilized Fast Amplifier, Low Bias Current (100V/,js, 1MHz

FPB):AN21,Pg.6 Wideband, High Input Impedance, Gain = 1000 Amplifier:




2-Channel Switch: LF198DS


± 5V Analog Switch Driver: LTC1045 DS ANEMOMETER— See Signal Conditioning AUDIO


Very Low Distortion Buffered Pre-Amplifier: LT1010



50mA Battery Charger and Regulator: LT1020 DS

Battery Charger: LT1 086 DS

Battery Charger: LTC1041 DS

Wind Powered Battery Charger: LTC1042 DS


Construction of Low Resistance Shunts: AN37, Pg. 4 Lead Acid

Temperature Compensated Lead Acid Battery Charger: LT1038 DS; LT117 DS; LT138 DS


Thermally Controlled NiCad Battery Charger: AN6, Pg. 4; LT1001 DS

Thermally Controlled NiCad Battery Charger: AN37, Pg. 2 Switched Mode Thermal NiCad Charger: AN37, Pg. 3, 4

BOOSTER-See Amplifier

BRIDGE AMPLIFIER— See Signal Conditioning


BUFFER-See Amplifier

BYPASSING-See Capacitors



FilterCAD User's Manual: AN38, Pg. 1 CAPACITORS Discussion

About Bypass Capacitors: AN13, Pg. 25 Hold Capacitor: LF198DS


Jim and Celia's Caribbean Trip: AN25, Pg. 24 Mr.CoolLT1025:AN28, Pg.20 Who You Gonna Call: AN35,Pg. 32 Kick That Creaky Stuff Out: AN35, Pg. 31

CLOCK CIRCUITS-See Oscillators


Additional Feature Circuits Driving Ground Referred Load: LT1011 DS; LT311A DS Driving Load Referenced to Negative Supply: LT1011 DS; LT311ADS

Driving Load Referenced to Positive Supply: LT1011 DS; LT311ADS

Noise Immune 60Hz Line Sync: LT1011 DS; LT119A DS

LT1011 DS;LT311ADS 2-Wire Comparator: LT1018DS


Fast Current Comparator (16 Bit): LT1055 DS Fast Current Comparator (12 Bit): OP15 DS


Fast Pre-Amplifier for Comparator: AN 1 7, Pg. 5 Discussion

High Speed Comparator Problems: AN13, Pg. 4 Input Protection: LT1011DS


Input Signal Mange: LI1U11 US Input Slew Rate Limitations: LT1011 DS Preventing Oscillation Problems: LT1011 DS Strobing: LT1011 DS

High Speed Design Techniques: LT1016 DS Input Impedance and Bias Current: LT1016 DS Measuring Response Time: LT1016 DS

Comparator with Hysteresis: LT1011 DS; LT685 DS

Low Power Comparator with < %V Hysteresis: LT101 2 DS

Fully Isolated Limit Comparator (500V Iso.): AN11, Pg. 10; LT1017DS


Output Level Shifting: AN13, Pg.31


Dual Limit Microvolt Comparator: OP227 DS One Shot

Voltage Controlled High Speed One Shot: LT319A DS Precision

Offset Stabilized Comparator: AN9, Pg. 11; LTC1052 DS Microvolt Comparator with TTL Output: LT1001 DS Dual Limit Microvolt Comparator: LT1002 DS Microvolt Comparator with Hysteresis: LT1007 DS


Trigger(50MHz):AN13,Pg.24 Ultra Fast

High Speed Comparator with Hysteresis: LT685 DS Window

Window Detector: LT1011 DS; LT311A DS 1.5V Powered Refrigerator Alarm: LT1017 DS Window Comparator with Symmetric Window Limits:

LTC1040 DS Window Comparator: LTC1042 DS Multi-Window Comparator and Display: LTC1045 DS



Peltier Cooled Switch Mode 0°C Reference: AN25, Pg. 12


In Crystal Oven Controller: AN1, Pg. 6 Ovenized Oscillator: AN12, Pg. 3



4 Digit (10,000 Count) A-D Converter: LT101 1 DS Auto-Zeroing A-D Offset Voltage: DN26, Pg. 1

A-D 8 Bits

Half Flash 8 Bit A/D Digitizes Photodiodes: AN33, Pg. 1 Data Acquisition Board: AN34, Pg. 1 Cascading for 9 Bit Resolution: LTC1099 DS

A-D 10 Bits

Fully Isolated A-D (10 Bit at 175V Iso.): AN11, Pg. 12 Simple, Fast A-D (10 Bit): AN13, Pg.20 1.5V A-D Powered (10 Bit): AN15, Pg.2 Micropower A-D (10 Bit, 100^s): AN23, Pg. 9 Interfacing LTC1 090 to 8051 : AN26A, Pg. 1 Interfacing LTC1090to MC68HC05: AN26B, Pg. 1 Interfacing LTC1090 to MC68HC11: AN26B, Pg. 1 Interfacing LTC1090 to HD63705V0: AN26C, Pg. 1 Interfacing LTC1090 to COP800: AN26D, Pg. 1 Interfacing LTC1090toTMS7000: AN26E, Pg. 1 Interfacing LTC1090 to COP400: AN26F, Pg. 1 Interfacing LTC1091 to 8051: AN26G, Pg. 1 Interfacing LTC1091 to 68HC05: AN26H, Pg. 1 Interfacing LTC1091 to 68HC11: AN26H, Pg. 1 Interfacing LTC1091 to COP800: AN26I, Pg. 1 Interfacing LTC1091 to HD6305V0: AN26L, Pg. 1 Interfacing LTC1091 to HD63705V0: AN26L, Pg. 1 Interfacing LTC1091/2 to TMS320C25: AN26N, Pg. 1 Data Acquisition System Uses 4 Wires: DN1, Pg. 1 Auto-Zeroing A/D Offset Voltage: DN26, Pg. 1 RS232 Compatible 10 Bit A-D Converter: LT1080 DS 10 Bit Serial Output A-D Converter: LT119A DS A Quick Look Circuit for the LTC1090 10 Bit A-D System: LTC1090 DS

Hitachi Synchronous SCI (HD63705) Interface: LTC1090 DS Intel 8051 Interface: LTC1090DS Motorola SPI (MC68HC05C4) Interface: LTC1090 DS National Microwire (COP420) Interface: LTC1090 DS Single Chip 8 Input Data Acquisition System: LTC1090 DS



Sneak-A-Bit Code for 10 Bits Plus Sign: LTC1090 DS

2 Channel, 10 Bit Serial A-D: LTC1091 DS

A Quick Look Circuit forthe LTC1091: LTC1091 DS

Intel 8051 Interface: LTC1091 DS

Motorola SPI (MC68HC05C4, MC68HC11) Interface: LTC1091 DS

A-D 12 Bits


SAR Converter (12 Bit, 5Ps): AN13, Pg. 19

Successive Approximation A-D Converter (12 Bits, 12/is):

AN17,Pg.1;LT1011DS A-D Converter (12 Bits, 7.5^s): AN17, Pg. 3 Successive Approximation A-D Converter (1 2 Bits, 1 .8/iS):

AN17, Pg.6 Micropower A-D (12 Bit, 300^s): AN23, Pg. 7 Interfacing LTC1290 to 8051: AN36A, Pg. 1 Interfacing LTC1290 to MC68HC05: AN36B, Pg. 1 Interfacing LTC1290to MC68HC11: AN36B, Pg. 1 Interfacing LTC1290toCOP800: AN36D, Pg. 1 Interfacing LTC1290 to TMS7742 MCU: AN36E, Pg. 1 Interfacing LTC1290 to COP400: AN36F, Pg. 1 Interfacing LTC1290 toZ-80 MPU: AN360, Pg. 1 4^s, 12 Bit SAR Converter: LT1016 DS 12 Bit Charge Balance Analog to Digital Converter: LT1055 DS 12 Bit A-D Converter: LT1058 DS Single Chip Data Acquisition System: LTC1290 DS

A-D 16 Bits

Analog to Digital (16 Bits): AN9, Pg. 16

16 Bit Analog to Digital Converter: LTC1052 DS


Synchronous Rectifier Based AC-DC Converter

(0Vrms-1.5Vrms to 0V-1.5V): AN13, Pg. 21 Acquisition PC Based Data Acquisition: AN34, Pg. 1 New Data Acquisition Systems Communicate with

Microprocessors Over 4 Wires: DN1, Pg. 1 Data Acquisition System Showing Sample and Hold

Synchronizing Circuitry: DN2, Pg. 1 Opto Isolated, Multichannel Data Acquisition System

(10 Bit, 500V Iso.): DN10, Pg. 2 Closed Loop Control with the LTC1090: DN13, Pg. 1

Two Wire Isolated and Powered 10 Bit Data Acquisition System: DN19, Pg. 1

12 Bit Data Acquisition Systems Communicate with Microprocessors Over 4 Wires: DN22, Pg. 1

Capacitance-Pulse Width

Capacitance to Pulse Width Converter: LT101 1 DS


Sine Wave Output Converter (115VAC): AN8, Pg. 1 1 LT1074 Based 400Hz Sinewave Output (28V to 110VAC): AN35, Pg. 15

DC-DC- See Regulator-Switching


V-F, Techniques: AN14, Pg. 18 Successive Approximation Techniques: AN17, Pg. 8 Thermal RMS-DC Converters: AN22, Pg. 1; LT1088 DS Analog Considerations for Interfacing the LTC1090 10 Bit Data

Acquisition System: LTC1090 DS Analog Considerations for Interfacing the LTC1091: LTC1091 DS


Frequency to Voltage: AN3, Pg. 1 1

Pulse Width-Voltage

Pulse Width to Voltage Converter: LF198 DS


50MHz Thermal RMS to DC Converter: AN5, Pg. 4; LT1013 DS Thermal RMS-DC Converter (100MHz): AN22, Pg. 5; LT1088 DS Fast Settling RMS-DC Converter: AN22, Pg. 9; LT1088 DS Servo-Sensed Heater Protection Circuit: AN22, Pg. 10 50MHz Thermal RMS-DC Converter: LTC1043 DS


Voltage to Frequency (0kHz-30kHz, 0V-3V): AN3, Pg. 11;

LTC1043 DS Offset Stabilizing a V-F Converter: AN9, Pg. 12 Voltage to Frequency (1 Hz-1 ,25MHz, 0V-5V): AN9, Pg. 13 Voltage to Frequency (1Hz-30MHz, 0V-3V): AN9, Pg. 15 Voltage to Frequency (1 Hz-10MHz, 0V-10V): AN13, Pg.9;


Quartz Stabilized, Voltage to Frequency (1 Hz-30MHz, 0V-10V): AN13, Pg. 11

Voltage to Frequency (1Hz-100MHz, 0V-1OV: King Kong V-F): AN14, Pg.2



Fast Response Voltage to Frequency (1 Hz-2.5MHz, 0V-5V): AN14, Pg.4

Quartz Stabilized Voltage to Frequency (0V-10V to 0kHz-10kHz): AN14, Pg.6

Ultra Linear Voltage to Frequency Converter (100kHz-1.1 MHz): AN14, Pg.7

1 .5V Voltage to Frequency Converter (1 Hz-1 kHz, OV-1 V): AN14,Pg.9

1/Vto Frequency Converter (OV-1 OV to 1kHz-2Hz): AN14, Pg. 12 Charge Pump 1/V to Frequency (0V-5V to 10kHz-50Hz): AN14,Pg.13

Exponential to Frequency (0V-10V to 20Hz-20kHz): AN14, Pg. 15

1.5V Voltage to Frequency Converter (OV-1 V to 25Hz-10kHz): AN15, Pg. 1

Micropower V-F Converter (0V-5V to 0kHz-10kHz): AN23, Pg. 1 1 Micropower V-F Converter (0V-5V to 0MHz-1MHz): AN23, Pg. 13; LT1006DS

Extended Range Charge Pump Voltage to Frequency Converter: LT1008DS

Voltage to Frequency Converter (10Hz-100kHz): LT1011 DS Voltage to Frequency Converter (1Hz-1MHz): LT1012 DS Low Power V to F Converter: LT1 01 8 DS Voltage to Frequency Converter (1 0Hz- 1 M Hz): LT1 022 DS Exponential Voltage to Frequency Converter: LT1055 DS Voltage to Frequency Converter (0Hz-10kHz): LT1055 DS Bipolar Input (AC) V-F Converter: LT1058 DS Voltage to Frequency Converter (5kHz-2MHz): LT119A DS Single 5V V-F Converter: LTC1040 DS Voltage to Frequency Converter (1Hz-1.25MHz): LTC1052DS Voltage to Frequency Converter (1Hz-30MHz): LTC1052 DS Mic

Voltage-Pulse Width Voltage Controlled Pulse Width Generator: LT1 01 6 DS



9 Isn't 10: AN22, Pg.4



Circuit Breaker (700ns): AN1, Pg. 3

Precision Current Sensing in Supply Rails: AN3, Pg. 13;

LTC1043 DS Circuit Breaker (12ns): AN13, Pg. 24 Fast High Side, High Current Limit: AN30, Pg. 44 In Line Current Limiter: LM134DS


Precision Current Sink: LT1001 DS Source

Voltage Controlled Current Source with Ground Referred Input

and Output: AN3,Pg. 13; LT1013DS Bidirectional Current Source: AN16, Pg. 19 Voltage Controlled Current Source: AN16, Pg. 20 Two Terminal Current Regulator: LM10 DS Bilateral Current Source: LM108 DS 20mA Positive Current Sou rce: LM 1 29 DS Basic Two Terminal Current Source: LM134 DS Better Temperature Coefficient Current Source: LM134 DS FET Cascading for Low Capacitance and/or Ultra High Output

Impedance: LM134 DS High Precision LowTC Current Source: LM134 DS Higher Output Current: LM134 DS Micropower Bias: LM134DS Precision 10nA Current Source: LM134 DS Precision Current Source: LT1001 DS Ground Reference Current Source: LT1004 DS Low Temperature Coefficient Two Terminal Current Source:


Precision Current Source (1/iA): LT1019 DS; LT1021 DS Fast, Differential Input Current Source: LT1022 DS Current Regulator: LT1033 DS; LT137 DS



4mA-20mA Current Loop Transmitter: AN11, Pg. 9; LT1013 DS 4mA-20mA Floating Output for Current Loop Transmitter:

AN11,Pg.10;LT1013DS Digitally Controlled 4mA-20mA Current Loop Generator:


2-Wire 0°C to 100°C Temperature Transducer with 4mA to 20mA Output: LTC1040DS


DC-DC— See Regulator-Switching




Amplifier: AN18, Pg. 8

DETECTORS— See Signal Conditioning



Additional Feature Circuits Logic System DC Isolation: LTC1045 DS


EEPROM Vp-p Pulse Generator: AN31, Pg. 5 EEPROM Pulse Generator: LT1013 DS


Vp-p Generator for EPROMs-No Trim Required: LT1004 DS

Flash Memory

Basic Flash Memory Vp-p Programming Voltage Supply:

AN31, Pg. 1; DN17, Pg. 1 High Repetition Rate Vp-p Programming Supply: AN31, Pg. 2;

DN17, Pg. 2

High Power, High Repetition Rate Vp-p Pulse Generator:

AN31,Pg.3 Vp-p Handshake Circuit: AN31, Pg. 4

Supply Monitor

AC-DC Dropout Detector: AN31, Pg. 7

Power Supply Monitor: DN20, Pg. 2

6V Battery Level Indicator: LM10 DS

Lead Acid Low Battery Detector: LT1004 DS

Battery Voltage Sensing Circuit: LT1005 DS; LT1035 DS

5V Powered Supply Monitor: LT1017 DS

Delay On Power Up: LT1017DS

Power Supply Monitor: LT1018 DS

TTL Power Supply Monitor: LTC1042 DS

Watch Dog

Watch Dog Timer: AN31, Pg. 10



Inductor Selection: AN35, Pg. 22



Minimizing Thermal EMFs: AN9, Pg. 2


Precision, Fast Settling, Lowpass Filter: LT1008 DS; LT1011 DS FILTER-SWITCHED CAPACITOR

Clock Sweepable Pseudo Bandpass Filters: AN24, Pg. 4 4th Order Butterworth BPF, f0 = 2kHz: AN27A, Pg. 1 Cascading Identical Sections 4th Order BPF at 150Hz:

AN27A, Pg.4 Mode 2 4th Order BPF at 1 50Hz: AN27A, Pg. 5 8th Order Chebyshev BPF at 10.2kHz: AN27A, Pg. 13 Wideband DC Accurate BPF: DN9, Pg. 1 10Hz-1000HzBPF: DN24, Pg. 1 10Hz-100HzBPF:DN24, Pg. 1 400Hz-10kHzBPF:DN24, Pg. 1 High Frequency Clock Tunable Bandpass Filter: LTC1043 DS Wide Range 2nd Order Bandpass/Notch Filter with Q = 1 0:

LTC1059 DS

Single 5V, Gain of 1000 4th Order Bandpass Filter: LTC1060 DS 6th Order Elliptic Bandpass Filter Centered Around 2600Hz: LTC1061 DS

6th Order, Clock Tunable, 0.5dB Ripple Chebyshev BPF: LTC1061 DS

Bandpass w/Two Notches ( - 60dB Stopband): LTC1064 DS C Message Filter: LTC1 064 DS Quad Bandpass Filter: LTC1064 DS

Bandreject- See Notch

FilterCAD User's Manual: AN38, Pg. 1 Discussion

Application Considerations for an Instrumentation Lowpass

Filter: AN20, Pg. 1 Cascading Identical BPF Sections: AN27A, Pg. 5 Simple 2nd Order BP Filters: AN27A, Pg. 6 Bandpass Filters: AN27A, Pg. 1 Chebyshev or Butterworth (BPF)?: AN27A, Pg. 13 Take the Mystery Out of the SCF: AN40, Pg. 1 Circuit Board Layout Considerations: AN40, Pg. 2 Power Supplies: AN40, Pg. 5



Offset Voltage Nulling Techniques: AN40, Pg. 7 Aliasing: AN40,Pg. 9 Slew Limiting: AN40, Pg. 9 What Kind of Filter to Use: AN40, Pg. 12 Step Response of Various Filters: AN40, Pg. 13 Frequency Response of Various Filters: AN40, Pg. 14 How Stable is My Filter?: AN40, Pg. 16 THDand Dynamic Range: AN40, Pg. 16 THD in Active RC Filters: AN40, Pg. 18 Clock Jitter: AN40, Pg.20 Clock Feedthru: AN40, Pg.21 Square Wave to Sine Wave Converter: AN40, Pg. 23 SCF LPF for Anti-Aliasing Applications: DN16, Pg. 1 Complex Data Acquisition System, Few Components: DN24, Pg. 1

Comments on Modes of Operation: LTC1060 DS

Definition of Filter Functions: LTC1060 DS

LTC1060 Offsets: LTC1060DS

Modes of Operation: LTC1060 DS

Modes of Operation: LTC1061 DS

Analog Considerations: Grounding and Bypassing: LTC1064 DS

Buffering, Offset Nulling and Noise: LTC1064 DS

Using Schottky Diodes to Protect the IC: LTC1064-1 DS


6th Order Elliptic Highpass Filter with Clock to Cutoff Ratio: 250:1: LTC1061 DS


RC to Eliminate Clock Feedthrough and Improve HF

Attenuation Floor: AN20, Pg. 4 Single Supply LTC1062: AN20, Pg. 4 Cascading Two LTC1062's: AN20, Pg. 7 Cascading Two LTC1062's Using the First UC1062's Buffered

Output: AN20, Pg.7 Low Offset, 12th Order, Max Flat Lowpass Filter: AN20, Pg. 8 A Lowpass Filter with a 60Hz Notch: AN20, Pg. 10 A Low Frequency, 5Hz Filter: AN20, Pg. 11 Using Input Divider to Accommodate High Voltages:

AN24, Pg. 7

Using the LTC1062 with Op Amps Operating from ± 15V Power

Supply: AN24, Pg.7 Using a Multiplexer to Obtain Four Different Cutoff

Frequencies: AN24, Pg. 8

8Hz 5th Order Butterworth LPF: DN7, Pg. 1 10Hz DC Accurate Bessel LPF: DN9, Pg. 1 8th Order Cauer 40kHz LPF: DN16, Pg. 1 6th Order Butterworth Lowpass Filter, Cutoff to 45kHz: LTC1061 DS

6th Order Chebyshev Filter Using Three Different Modes for

Speed Optimization: LTC1061 DS 7th Order Lowpass Elliptic Filter: LTC1061 DS 1 0Hz 5th Order Butterworth Lowpass Fi Iter: LTC1 062 DS 100Hz, 50Hz, 25Hz, 5th Order DC Accurate LP Filter:

LTC1062 DS

5th Order Lowpass Filter with a 60Hz Notch: LTC1062 DS

5th Order Lowpass Filter: LTC1062 DS

7th Order 100Hz Lowpass Filter with Continuous Filtering,

Output Buffering: LTC1062DS Filtering AC Signals from High DC Voltages: LTC1062 DS Octave Tuning with a Single Input Clock: LTC1062 DS Simple Cascading Technique— LTC1062: LTC1062 DS Single 5V Supply 5th Order LP Filter: LTC1062 DS 8th Order Bessel w/65:1 fCLK% LTC1064 DS 8th Order Cauer Cutoff up to 100kHz: LTC1064 DS 8th Order Chebyshev up to 100kHz, 0.1dB Ripple: LTC1064 DS 8th Order Elliptic to 50kHz, 0.1dB Ripple: LTC1064 DS Dual 4th Order Bessel to 140kHz: LTC1064 DS Dual 5th Order Chebyshev 50/1 00kHz Cutoff : LTC1064 DS 8th Order Elliptic Anti-Aliasing Filter: LTC1064-1 DS Buffering the Filter Output: LTC1064-1 DS Dual 5th Order Elliptic/Bessel: LTC1064-1 DS Output Buffer Eliminates Clock Feedthrough: LTC1064-1 DS Transitional Elliptic/Bessel 10th Order: LTC1064-1 DS 8th Order Butterworth to 140kHz: LTC1064-2 DS 8th Order Bessel to 100kHz: LTC1064-3 DS 8th Order Elliptic to 100kHz: LTC1064-4 DS


Bandpass Filters and Noise: AN40, Pg. 19 Noise in Switched Capacitor Filters: AN40, Pg. 19 LTC1060 Wideband RMS Noise: LTC1060 DS Wideband RMS Noise: LTC1061 DS


Using the LTC1062 to Create a Notch: AN20, Pg. 9 A Lowpass Filter with a 60Hz Notch: AN20, Pg. 1 0 Clock Tunable Notch Filter: AN24, Pg. 6