Product details

PGA/VGA PGA Number of channels (#) 1 BW @ Acl (MHz) 6 Vs (Max) (V) 36 Vs (Min) (V) 10 Acl, min spec gain (V/V) 0.125 Gain (Max) (dB) 42 Slew rate (Typ) (V/us) 1 Operating temperature range (C) -40 to 125
PGA/VGA PGA Number of channels (#) 1 BW @ Acl (MHz) 6 Vs (Max) (V) 36 Vs (Min) (V) 10 Acl, min spec gain (V/V) 0.125 Gain (Max) (dB) 42 Slew rate (Typ) (V/us) 1 Operating temperature range (C) -40 to 125
TSSOP (PW) 16 22 mm² 5 x 4.4
  • Wide Input Range: ±15.5 V at ±18 V Supply
  • Binary Gain Steps: 128 V/V to 1/8 V/V
  • Additional Scaling Factor: 1 V/V and 1 3/8 V/V
  • Low Offset Voltage: 5 µV at G = 128
  • Near-Zero Long-Term Drift of Offset Voltage
  • Near-Zero Gain Drift: 0.5 ppm/°C
  • Excellent Linearity: 1.5 ppm
  • Excellent CMRR: 140 dB
  • High Input Impedance
  • Very Low 1/f Noise
  • Differential Signal Output
  • Overload Detection
  • TSSOP-16 Package
  • Wide Input Range: ±15.5 V at ±18 V Supply
  • Binary Gain Steps: 128 V/V to 1/8 V/V
  • Additional Scaling Factor: 1 V/V and 1 3/8 V/V
  • Low Offset Voltage: 5 µV at G = 128
  • Near-Zero Long-Term Drift of Offset Voltage
  • Near-Zero Gain Drift: 0.5 ppm/°C
  • Excellent Linearity: 1.5 ppm
  • Excellent CMRR: 140 dB
  • High Input Impedance
  • Very Low 1/f Noise
  • Differential Signal Output
  • Overload Detection
  • TSSOP-16 Package

The PGA281 is a high-precision instrumentation amplifier with a digitally-controllable gain and signal-integrity test capability. This device uses proprietary autozeroing techniques to offer low offset voltage, near-zero offset and gain drift, excellent linearity, and nearly no 1/f noise.

The PGA281 is optimized to provide an excellent common-mode rejection of greater than 110 dB (G = 1) over a wide frequency range. Superior common-mode and supply rejection supports high-resolution, precise measurement. The 36-V supply capability and wide, high-impedance input range comply with requirements for universal signal measurement.

The PGA281 offers multiple internal gain options from ⅛ V/V (attenuation) to 176 V/V, making this a universal, high-performance, analog front-end suitable for a wide variety of applications. The fully differential, rail-to-rail output is designed to easily interface a wide range of input signals to the low-voltage domain of high-resolution analog-to-digital converters (ADCs).

The PGA281 is available in a TSSOP-16 package and is specified over a temperature range of –40°C to +105°C.

The PGA281 is a high-precision instrumentation amplifier with a digitally-controllable gain and signal-integrity test capability. This device uses proprietary autozeroing techniques to offer low offset voltage, near-zero offset and gain drift, excellent linearity, and nearly no 1/f noise.

The PGA281 is optimized to provide an excellent common-mode rejection of greater than 110 dB (G = 1) over a wide frequency range. Superior common-mode and supply rejection supports high-resolution, precise measurement. The 36-V supply capability and wide, high-impedance input range comply with requirements for universal signal measurement.

The PGA281 offers multiple internal gain options from ⅛ V/V (attenuation) to 176 V/V, making this a universal, high-performance, analog front-end suitable for a wide variety of applications. The fully differential, rail-to-rail output is designed to easily interface a wide range of input signals to the low-voltage domain of high-resolution analog-to-digital converters (ADCs).

The PGA281 is available in a TSSOP-16 package and is specified over a temperature range of –40°C to +105°C.

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Technical documentation

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Type Title Date
* Data sheet Precision, Zero-Drift, High-Voltage, Programmable Gain Instrumentation Amplifier datasheet (Rev. A) 21 Jun 2013
Application note Precision signal conditioning for safety-enabled AIMs in factory automation 30 Sep 2019
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) 22 Mar 2017
Technical article What you need to know about CMRR – Instrumentation amplifier topologies (Part 3) 06 Nov 2013
Technical article A closer look at special function amplifiers 15 Aug 2013
User guide PGA281EVM User's Guide 13 May 2013

Design & development

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

Evaluation board

PGA281EVM — Evaluation Module for Zero-Drift, High Voltage Programmable Gain Amplifier

The PGA281EVM provides basic functional evaluation of the PGA281, a high-precision instrumentation amplifier with pin-programmable gain, attenuation, and error detection.

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Simulation model

PGA281 PSpice Model (Rev. A)

SBOM815A.ZIP (135 KB) - PSpice Model
Simulation model

PGA281 TINA-TI Reference Design

SBOM817.TSC (11220 KB) - TINA-TI Reference Design
Simulation model

PGA281 TINA-TI Spice Model

SBOM818.ZIP (15 KB) - TINA-TI Spice Model
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 (...)
Reference designs

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This TI Precision Verified Design provides the theory, component selection, simulation, complete PCB schematic and layout, bill of materials, and measured performance of a split-supply, high-side four decade current sensing solution that can accurately detect load currents from 10uA-100mA. The (...)
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TSSOP (PW) 16 View options

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