Product details

Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 2.5 Input offset (+/-) (Max) (uV) 8000 Gain (Min) (V/V) 5 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 46 Features Cost Optimized, Shutdown CMRR (Min) (dB) 60 Input bias current (+/-) (Max) (nA) 0.01 Iq (Typ) (mA) 0.415 Bandwidth at min gain (Typ) (MHz) 2 Gain error (+/-) (Max) (%) 0.4 Operating temperature range (C) -55 to 125 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.025 Output swing headroom (to positive supply) (Typ) (V) -0.025 Input common mode headroom (to negative supply) (Typ) (V) 0.55 Input common mode headroom (to positive supply) (Typ) (V) -1.7 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 7 Gain non-linearity (+/-) (Max) (%) 0.01
Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 2.5 Input offset (+/-) (Max) (uV) 8000 Gain (Min) (V/V) 5 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 46 Features Cost Optimized, Shutdown CMRR (Min) (dB) 60 Input bias current (+/-) (Max) (nA) 0.01 Iq (Typ) (mA) 0.415 Bandwidth at min gain (Typ) (MHz) 2 Gain error (+/-) (Max) (%) 0.4 Operating temperature range (C) -55 to 125 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.025 Output swing headroom (to positive supply) (Typ) (V) -0.025 Input common mode headroom (to negative supply) (Typ) (V) 0.55 Input common mode headroom (to positive supply) (Typ) (V) -1.7 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 7 Gain non-linearity (+/-) (Max) (%) 0.01
VSSOP (DGK) 8 15 mm² 3 x 4.9
  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • HIGH CMRR: 73dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH,SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

All trademarks are the property of their respective owners.

  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • HIGH CMRR: 73dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH,SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

All trademarks are the property of their respective owners.

The INA332 and INA2332 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply, and bipolar-supply operation. Using a special manufacturing flow, the INA332 family provides the lowest cost available, while still achieving low-noise amplification of differential signals with low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multichannel applications.

Configured internally in a gain of 5V/V, the INA332 offers flexibility in higher gains by choosing external resistors.

The INA332 rejects line noise and its harmonics because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate make the INA332 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA332 outperforms discrete designs.

Additionally, because they are specified for wide temperature range of –55°C to +125°C and operating range of –65°C to +150°C, the INA331 family can be used in demanding environments.

The INA332 and INA2332 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply, and bipolar-supply operation. Using a special manufacturing flow, the INA332 family provides the lowest cost available, while still achieving low-noise amplification of differential signals with low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multichannel applications.

Configured internally in a gain of 5V/V, the INA332 offers flexibility in higher gains by choosing external resistors.

The INA332 rejects line noise and its harmonics because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate make the INA332 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA332 outperforms discrete designs.

Additionally, because they are specified for wide temperature range of –55°C to +125°C and operating range of –65°C to +150°C, the INA331 family can be used in demanding environments.

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Technical documentation

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Type Title Date
* Data sheet INA332, INA2332 Low-Power, Single-Supply, CMOS Instrumentation Amplifiers datasheet (Rev. B) 12 Oct 2006
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 27 Jul 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
Technical article Why doesn’t my INA CMRR change with gain? 28 Feb 2014
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013

Design & development

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

Simulation model

INA332 PSpice Model (Rev. B)

SBOC015B.ZIP (24 KB) - PSpice Model
Simulation model

INA332 TINA-TI Reference Design (Rev. B)

SBOC174B.TSC (101 KB) - TINA-TI Reference Design
Simulation model

INA332 TINA-TI Spice Model (Rev. A)

SBOM253A.ZIP (9 KB) - TINA-TI Spice Model
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 operational-amplifier (...)
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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 (...)
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 (...)
User guide: PDF
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