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Product details

Parameters

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 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Package | Pins | Size

TSSOP (PW) 16 22 mm² 5 x 4.4 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Features

  • 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
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Description

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

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$75.00
Description

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

Features
  • Onboard power management circuitry generates all required power-supply rails from one split-supply input
  • DIP switch allows easy setting of pin-programmable gain
  • Error flag LED provides visual feedback of any detected error condition
  • Easy access to pertinent nodes with test points, BNC connectors, and (...)

Design tools & simulation

SIMULATION MODELS Download
SBOM815.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SBOM816.PDF (164 KB) - PSpice Model
SIMULATION MODELS Download
SBOM817.TSC (11220 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM818.ZIP (15 KB) - TINA-TI Spice Model
SIMULATION TOOLS 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

Reference designs

REFERENCE DESIGNS Download
10uA-100mA, 0.05% Error, High-Side Current Sensing Solution Reference Design
TIPD135 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options

Ordering & quality

Support & training

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