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INA849

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Ultra-low noise (1 nV/√Hz), high-speed (28 MHz, 35 V/μ), precision (35 μV) instrumentation amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 8 Input offset (+/-) (Max) (uV) 35 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 1 Features Ultra-low noise, High speed, Super-beta, Current Feedback CMRR (Min) (dB) 123 Input offset drift (+/-) (Max) (uV/C) 0.4 Input bias current (+/-) (Max) (nA) 20 Iq (Typ) (mA) 6.2 Bandwidth at min gain (Typ) (MHz) 28 Gain error (+/-) (Max) (%) 0.1 Operating temperature range (C) -40 to 125 Type Resistor Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.06 Gain non-linearity (+/-) (Max) (%) 0.001 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Instrumentation amplifiers

Features

  • Ultra-low noise: 1-nV/√Hz input voltage noise (typical)
  • Precision super-beta input performance:
    • Low offset voltage: 35 µV (maximum)
    • Low offset voltage drift: 0.4 µV/°C (maximum)
    • Low input bias current: 20 nA (maximum)
    • Low gain drift: 5 ppm/°C for G = 1 (maximum)
  • Bandwidth: 28 MHz (G = 1), 8 MHz (G = 100)
  • Slew rate: 35 V/µs
  • Common-mode rejection: 120 dB (minimum) for maximum gain
  • Supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Packages: 8-pin SOIC and VSSOP

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Description

The INA849 is an ultra-low noise instrumentation amplifier optimized for maximum accuracy in high-resolution systems and operation over a wide single-supply or dual-supply range. The device offers significantly lower input bias current than competitors as a result of super-beta input transistors. A state-of-the-art manufacturing process provides exceptionally low voltage noise, input offset voltage, and offset voltage drift.

Precisely matched integrated resistors provide a high, 92-dB (G = 1) common-mode rejection across the full input common-mode range. A single external resistor sets any gain from 1 to 10,000. The current-feedback topology of the INA849 provides wide bandwidth at higher gains for very-small, fast-moving signals. For example, the device provides 8 MHz of bandwidth at G = 100, and 28 MHz at a G = 1, with a fast 0.4-µs settling time (0.01%) for directly driving high-resolution, analog-to-digital converters (ADCs).

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NEW INA848 ACTIVE Ultra-low-noise, high-bandwidth instrumentation amplifier with fixed gain of 2000 Similar device with fixed gain (G=2,000) , improved gain error, and ultra-low noise (1.5-nV/√Hz)

Technical documentation

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Type Title Date
* Data sheet INA849 Ultra-Low-Noise (1 nV/√Hz), High-Bandwidth, Instrumentation Amplifier datasheet (Rev. B) Apr. 23, 2021
Application note How to Select Precision Amplifiers for Semiconductor Testers (Rev. A) Dec. 03, 2020
Technical article What is an instrumentation amplifier? Aug. 09, 2019
Technical article How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
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.

Hardware development

EVALUATION BOARD Download
document-generic User guide
25
Description
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 (...)
Features
  • Intuitive evaluation
  • Easy access to nodes with suface-mount test points
  • Reference voltage source flexibility
  • Convenient input and output filtering

Design tools & simulation

SIMULATION MODEL Download
SBOMBJ6.ZIP (74 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOMBJ7.ZIP (22 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBJ8.TSC (444 KB) - TINA-TI Reference Design
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
  • (...)
CALCULATION TOOL Download
Common-Mode Input Range Calculator for Instrumentation Amplifiers
INA-CMV-CALC The Common-Mode Input Range Calculator is tool for quickly generating plots of an instrumentation amplifier’s common-mode input range vs output. The tool is compatible with both 2-amp and 3-amp instrumentation amplifiers utilizing any supply range.

The Common-Mode Input Range Calculator is pre-loaded (...)

Features
  • Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
  • Customizable supply, gain, and voltage reference options
  • Calculator displays output limitations graphically and numerically

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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  • Ongoing reliability monitoring

Support & training

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