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

INA819

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 4.5 Input offset (+/-) (Max) (uV) 35 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 8 Features Super-beta, Small Size, Overvoltage Protection CMRR (Min) (dB) 110 Input offset drift (+/-) (Max) (uV/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 Type Resistor 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-10 Hz (Typ) (uVpp) 0.19 Gain non-linearity (+/-) (Max) (%) 0.0015
Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 4.5 Input offset (+/-) (Max) (uV) 35 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 8 Features Super-beta, Small Size, Overvoltage Protection CMRR (Min) (dB) 110 Input offset drift (+/-) (Max) (uV/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 Type Resistor 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-10 Hz (Typ) (uVpp) 0.19 Gain non-linearity (+/-) (Max) (%) 0.0015
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SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (DRG) 8 9 mm² 3 x 3
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  • 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
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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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Type Title Date
* Data sheet INA819 35-μV Offset, 8-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier datasheet (Rev. C) 09 Jun 2020
Application note How to Select Amplifiers for Pressure Transmitter Applications (Rev. A) 27 Jul 2021
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
Application note Difference Between an Instrumentation Amplifier and a Current Sense Amplifier 03 Apr 2020
User guide Universal Instrumentation Amplifier EVM: Alternate Pinout User's Guide 07 Feb 2020
Application note Precision signal conditioning for safety-enabled AIMs in factory automation 30 Sep 2019
Technical article What is an instrumentation amplifier? 09 Aug 2019
Application note Precision signal-conditioning solutions for motor control with position feedback 14 Jun 2019
Application note Comprehensive Error Calculation for Instrumentation Amplifiers 26 Mar 2019
Application note Simplify Voltage and Current Measurement in Battery Test Equipment 16 Oct 2017
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013
Application note Getting the most out of your instrumentation amplifier design 10 Oct 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

INA826EVM — INA826 Evaluation Module

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

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Evaluation board

INAEVM-ALT-SO8 — Universal instrumentation amplifier evaluation module with alternate pin-out

The universal INAEVM-ALT-SO8 (instrumentation amplifier evaluation module with alternate pin-out) is available to simplify prototyping precision instrumentation amplifiers in the SO-8 (D) package with the pinout shown.  See the chart below for compatible TI INA devices. Note: These boards are (...)
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Simulation model

INA819 TINA-TI Reference Design

SBOMAW0.TSC (441 KB) - TINA-TI Reference Design
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Simulation model

INA819 TINA-TI Spice Model

SBOMAW1.ZIP (11 KB) - TINA-TI Spice Model
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Simulation model

INA819 PSpice Model

SBOMAW2.ZIP (40 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Calculation tool

ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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Package Pins Download
SOIC (D) 8 View options
SON (DRG) 8 View options
VSSOP (DGK) 8 View options

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