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INA819

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Low power (350-µA), precision instrumentation amp with ±60-V overvoltage protection (gain pins 2, 3)

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Data sheet

INA819

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 35 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Overvoltage protection, Small Size, Super-beta CMRR (min) (dB) 110 Input offset drift (±) (max) (µV/°C) 0.4 Input bias current (±) (max) (nA) 0.5 Iq (typ) (mA) 0.35 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.0015 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.19
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 35 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Overvoltage protection, Small Size, Super-beta CMRR (min) (dB) 110 Input offset drift (±) (max) (µV/°C) 0.4 Input bias current (±) (max) (nA) 0.5 Iq (typ) (mA) 0.35 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.0015 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.19
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm) WSON (DRG) 8 9 mm² (3 mm × 3 mm)
  • Low offset voltage: 10 µV (typ), 35 µV (max)
  • Gain drift: 5 ppm/°C (G = 1), 35 ppm/°C (G > 1) (max)
  • Noise: 8 nV/√ Hz
  • Bandwidth: 2 MHz (G = 1), 270 kHz (G = 100)
  • Stable with 1-nF capacitive loads
  • Inputs protected up to ±60 V
  • Common-mode rejection: 110 dB, G = 10 (min)
  • Power supply rejection: 110 dB, G = 1 (min)
  • Supply current: 385 µA (max)
  • Supply range:
    • Single supply: 4.5 V to 36 V
    • Dual supply: ±2.25 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Packages: 8-pin SOIC, VSSOP, WSON
  • Low offset voltage: 10 µV (typ), 35 µV (max)
  • Gain drift: 5 ppm/°C (G = 1), 35 ppm/°C (G > 1) (max)
  • Noise: 8 nV/√ Hz
  • Bandwidth: 2 MHz (G = 1), 270 kHz (G = 100)
  • Stable with 1-nF capacitive loads
  • Inputs protected up to ±60 V
  • Common-mode rejection: 110 dB, G = 10 (min)
  • Power supply rejection: 110 dB, G = 1 (min)
  • Supply current: 385 µA (max)
  • Supply range:
    • Single supply: 4.5 V to 36 V
    • Dual supply: ±2.25 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Packages: 8-pin SOIC, VSSOP, WSON

The INA819 is a high-precision instrumentation amplifier that offers low power consumption and operates over a very wide single-supply or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device offers high precision as a result of super-beta input transistors, which provide exceptionally low input offset voltage, offset voltage drift, input bias current, input voltage, and current noise. Additional circuitry protects the inputs against overvoltage up to ±60 V.

The INA819 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 90 dB across the full input common-mode range. The device is designed for low-voltage operation from a 4.5-V single supply, as well as dual supplies up to ±18 V.

The INA819 is available in 8-pin SOIC, VSSOP, and WSON packages, and is specified over the –40°C to +125°C temperature range.

The INA819 is a high-precision instrumentation amplifier that offers low power consumption and operates over a very wide single-supply or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device offers high precision as a result of super-beta input transistors, which provide exceptionally low input offset voltage, offset voltage drift, input bias current, input voltage, and current noise. Additional circuitry protects the inputs against overvoltage up to ±60 V.

The INA819 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 90 dB across the full input common-mode range. The device is designed for low-voltage operation from a 4.5-V single supply, as well as dual supplies up to ±18 V.

The INA819 is available in 8-pin SOIC, VSSOP, and WSON packages, and is specified over the –40°C to +125°C temperature range.
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Technical documentation

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* Data sheet INA819 35-μV Offset, 8-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier datasheet (Rev. D) PDF | HTML Apr 7, 2022
Application brief How to Select Amplifiers for Pressure Transmitter Applications (Rev. B) PDF | HTML Feb 14, 2023
Application brief Simplify Voltage and Current Measurement in Battery Test Equipment (Rev. A) PDF | HTML Mar 10, 2022
Application note Amplifier Input Common-Mode and Output-Swing Limitations PDF | HTML Jan 14, 2022
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML Jul 27, 2021
Application brief Difference Between an Instrumentation Amplifier and a Current Sense Amplifier Apr 3, 2020
User guide Universal Instrumentation Amplifier EVM: Alternate Pinout User's Guide Feb 7, 2020
Analog design Journal Precision signal conditioning for safety-enabled AIMs in factory automation Sep 30, 2019
Technical article What is an instrumentation amplifier? PDF | HTML Aug 9, 2019
Analog design Journal Precision signal-conditioning solutions for motor control with position feedback Jun 14, 2019
Application brief Comprehensive Error Calculation for Instrumentation Amplifiers Mar 26, 2019
Analog design Journal Getting the most out of your instrumentation amplifier design Oct 10, 2005

Design & development

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Evaluation board

INA826EVM — INA826 Evaluation Module

The INA826EVM is intended to provide basic functional evaluation of the INA826.

User guide: PDF
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Evaluation board

INAEVM-ALT-SO8 — Evaluation module for instrumentation amplifiers with alternate pinout in SO-8 (D) package

The INAEVM-ALT-SO8 is an instrumentation amplifier evaluation module (EVM) with alternate pinout and is used to simplify prototyping precision instrumentation amplifiers in the SO-8 (D) package with the pinout shown in the user’s guide. The EVM is an unpopulated board, so instrumentation (...)

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Simulation model

INA819 PSpice Model (Rev. B)

SBOMAW2B.ZIP (28 KB) - PSpice model
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Simulation model

INA819 TINA-TI Reference Design (Rev. A)

SBOMAW0A (411 KB) - TINA-TI reference design
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Simulation model

INA819 TINA-TI Spice Model (Rev. A)

SBOMAW1A.ZIP (14 KB) - TINA-TI Spice model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
WSON (DRG) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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