INA317

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Micro-power (50µA), zero-drift (75µV offset, 0.3µV/˚C), precision RRO instrumentation amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 1.8 Input offset (+/-) (Max) (uV) 75 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 50 Features Zero Drift CMRR (Min) (dB) 100 Input offset drift (+/-) (Max) (uV/C) 0.3 Input bias current (+/-) (Max) (nA) 0.2 Iq (Typ) (mA) 0.05 Bandwidth at min gain (Typ) (MHz) 0.15 Gain error (+/-) (Max) (%) 0.25 Operating temperature range (C) -40 to 125 Type Resistor Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 1 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Instrumentation amplifiers

Features

  • Low Offset Voltage: 75 µV (Maximum), G ≥ 100
  • Low Drift: 0.3 µV/°C, G ≥ 100
  • Low Noise: 50 nV/√Hz, G ≥ 100
  • High CMRR: 100 dB (Minimum), G ≥ 10
  • Low Input Bias Current: 200 pA (Maximum)
  • Supply Range: 1.8 V to 5.5 V
  • Input Voltage: (V–) 0.1 V to (V+) –0.1 V
  • Output Range: (V–) 0.05 V to (V+) –0.05 V
  • Low Quiescent Current: 50 µA
  • Operating Temperature: –40°C to +125°C
  • RFI Filtered Inputs
  • 8-Pin VSSOP Package
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Description

The INA317 is a low-power, precision instrumentation amplifier offering excellent accuracy. The versatile 3-operational amplifier design, small size and low power make the INA317 usable in a wide range of portable applications.

A single external resistor sets any gain from 1 to 1000, as defined by the industry-standard gain equation: G = 1 + (100 kΩ / RG).

The instrumentation amplifier provides low offset voltage (75 µV, G ≥ 100), excellent offset voltage drift
(0.3 µV/°C, G ≥ 100) and high common-mode rejection (100 dB at G ≥ 10). The INA317 operates with power supplies as low as 1.8 V (±0.9 V) and a quiescent current of 50 µA, making the device usable in battery-operated systems. Using autocalibration techniques to ensure precision over the extended industrial temperature range, the INA317 device offers low noise density (50 nV/√Hz) that extends down to DC.

The INA317 is available in an 8-pin VSSOP surface-mount package and is specified over the TA = –40°C to +125°C temperature range.

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Technical documentation

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Type Title Date
* Data sheet INA317 Micro-Power (50-µA), Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier datasheet Nov. 21, 2017
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps Jul. 27, 2021
Application note Zero-Drift Amplifiers: Features and Benefits (Rev. C) Jan. 28, 2021
Technical article What is an instrumentation amplifier? Aug. 09, 2019
Application note Comprehensive Error Calculation for Instrumentation Amplifiers Mar. 26, 2019
Application note Measuring the linear operating region of instrumentation amplifiers Oct. 24, 2016
Technical article How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
User guide Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) Aug. 09, 2016
Application note VCM vs. VOUT plots for instrumentation amplifiers with two op amps Oct. 30, 2015
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013

Design & development

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

Design tools & simulation

SIMULATION MODEL Download
SBOMAQ7A.TSC (1395 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOMAQ8A.ZIP (11 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOMAQ9A.ZIP (17 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
CALCULATION TOOL Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

Reference designs

REFERENCE DESIGNS Download
RTD replacement for cold junction compensation reference design in a temperature sensor
TIDA-010019 — Temperature-sensing applications that use a thermocouple (TC) require an accurate local temperature sensor to achieve high accuracy. Solutions for design challenges such as cold-junction compensation (CJC) or including an ultra-low power TC analog front-end are highlighted and addressed in this (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Software-Configurable Cardiac Pacemaker Detection Module Reference Design
TIDA-010005 — This reference design implements a compact hardware-based circuit to detect the pacemaker pulse during ECG measurement. It provides indication of valid pace signal through a flag and onboard LED. This design enables the user to configure various parameters of the pace signal (amplitude, rise time (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

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