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[FAQ] How do Instrumentation Amplifiers (INAs) fit into my design?

Tamara M Alani
Genius 10850 points
Other Parts Discussed in Thread: INA148, INA149

How do Instrumentation Amplifiers (IAs) fit into my design?

TI Precision Labs - IA

  1. Introduction to instrumentation amplifiers Training Video
  2. When to use an instrumentation amplifier Training Video
  3. Instrumentation amplifier topologies: one amp theory Training Video
  4. Instrumentation amplifier topologies: one amp use cases Training Video
  5. Instrumentation amplifier topologies: three amp theory Training Video 
  6. Instrumentation amplifier topologies: two amp theory Training Video

General IA Knowledge

  1. What is an instrumentation amplifier? Technical Article
  2. Getting the most out of your instrumentation amplifier design SLYT226
  3. Measuring the linear operating region of instrumentation amplifiers SLYT690
  4. INAs: Offset voltage vs. gain Technical Article
  5. Comprehensive Error Calculation for Instrumentation Amplifiers SBOA341
  6. How to layout a PCB for an instrumentation amplifier Technical Article
  7. Burr-Brown’s: The Instrumentation Amplifier Handbook INA Guide (Optimized for Internet Explorer)
  8. How to determine the ins and outs of instrumentation amps Training Video
  9. Designing a discrete wide-bandwidth, cost-sensitive instrumentation amplifier Technical Article 
  10. Overlooking the obvious: the input impedance of a difference amplifier Technical Article
  11. Importance of Input Bias Current Return Paths in Instrumentation Amplifier Applications Technical Article

Current Sensing

  1. A Current Sensing Tutorial EE Times Post
  2. Simplifying Current Sensing SLYY154
  3. 3-decade, load-current sensing circuit SBOA210A
  4. Current Sensing using PCB Rogowski Coil TIDA-01063

Battery Testing Designs

  1. Modular Battery Tester Reference Design for 50-A, 100-A and 200-A applications TIDA-01042
  2. Battery Tester reference design for multi-phase high-precision 0.5 to 100A battery formation TIDA-01041
  3. Batter Tester Reference Design for High Current Applications TIDA-01040
  4. Simplify Voltage and Current Measurement in Battery Test Equipment SBOA236

Designing for Low Distortion and Common Mode Rejection

  1. Low Distortion Design – Precision Labs Training Video
  2. Common Mode Rejection – Precision Labs Training Video
  3. Dealing with rejection: Instrumentation amplifier PSRR and CMRR Technical Article
  4. What you need to know about CMRR – The instrumentation amplifier Technical Article
  5. What you need to know about CMRR – Instrumentation amplifier topologies Technical Article
  6. Why doesn't my INA CMRR change with gain? Technical Article
  7. INA148 Linear Operation Checker: TINA Calculator
  8. INA149 Linear Operation Checker: TINA Calculator 

Vcm vs. Vout

  1. Vcm vs. Vout plots for INAs with two op amps SLYT647
  2. How Instrumentation Amplifier Vcm vs. Vout plots change with supply and reference voltage Technical Article
  3. A six-sided puzzle: VCM vs. VOUT plots for instrumentation amplifiers Technical Article

Analog Input Module Reference Designs

  1. Single Supply Analog Input Module Reference Design TIPD166
  2. 4- to 20-mA Analog Input Module Reference Design for Safety Applications TIDA-00548
  3. 8-ch Isolated High Voltage Analog Input Module Reference Design TIDA-00764

INAs in Motor Control Applications

  1. Precision signal-conditioning solutions for motor-control position feedback SLTY776

ADC driving

  1. Circuit for driving high-voltage SAR ADC with a buffered instrumentation SBAA286
  2. Circuit for driving an ADC with an instrumentation amplifier in high gain SBAA314
  3. Circuit for driving a high-voltage SAR with an instrumentation amplifier SBAA316
  4. Circuit for driving a switched-capacitor SAR ADC with a buffered instrumentation amplifier SBAA277A
  5. Circuit for driving a switched-capacitor SAR ADC with an instrumentation amplifier SBAA245A
  6. High common-mode differential input voltage to +- 10-V ADC input circuit SBAA337
  7. How to Select Amplifiers for Pressure Transmitter Applications SNOA975

DC Rejection

  1. Instrumentation Amplifier with DC Rejection Reference Design TIPD191
  2. AC coupled instrumentation amplifier circuit SBOA242

Design Tools

  1. Analog Engineer Calculator: Click on "Amplifier and Comparators" and then click on "INA VCM v VOUT" for the boundary plot tool

Newest Technology Instrumentation Amplifiers and Evaluation Modules

  1. INA818 – 35-uV offset, 8nV/sqrt(Hz) noise, low-power, precision instrumentation amplifier
  2. INA819 – 35-uV offset, 8nV/sqrt(Hz) noise, low-power, precision instrumentation amplifier
  3. INA821 – 35-uV offset, 7nV/sqrt(Hz) noise, low-power, precision instrumentation amplifier
  4. INA828 – 50-uV offset, 7nV/sqrt(Hz) noise, low-power, precision instrumentation amplifier
  5. SBOU122B – Universal Instrumentation Amplifier EVM