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PGA280
  • PGA280
  • PGA280
  • PGA280

PGA280

ACTIVE

Zero Drift, HV Programmable Gain Amplifier

Texas Instruments PGA280 Product Info

1 April 2026 4

Parameters

PGA/VGA

PGA

Number of channels

2

Vs (min) (V)

10

Vs (max) (V)

36

Input type

Differential

Output type

Differential

Input offset drift (±) (typ) (µV/°C)

0.03

Interface type

GPIO, SPI

Noise at 1 kHz (typ) (V√Hz)

0.00000002

BW at Acl (MHz)

6

Acl, min spec gain (V/V)

0.125

Gain (max) (dB)

42

Architecture

CMOS

Features

SPI, Zero Drift

Vos (offset voltage at 25°C) (typ) (mV)

0.003

Input voltage noise (typ) (µV√Hz)

0.022

Slew rate (typ) (V/µs)

1

Iq per channel (typ) (mA)

3.15

Gain error (typ) (%)

0.03

Gain drift (max) (ppm/°C)

0.5

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Package

TSSOP (PW)-24-49.92 mm² 7.8 x 6.4

Features

  • Wide input range: ±15.5 V at ±18-V supply
  • Binary gain steps: 128V/V to 1/8 V/V
  • Additional scaling factor: 1 V/V and 1⅜ V/V
  • Low offset voltage: 3 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
  • Input configuration switch matrix
  • Wire break test current
  • Expandable SPI™ with checksum
  • General-purpose I/O port
  • TSSOP-24 package
  • Wide input range: ±15.5 V at ±18-V supply
  • Binary gain steps: 128V/V to 1/8 V/V
  • Additional scaling factor: 1 V/V and 1⅜ V/V
  • Low offset voltage: 3 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
  • Input configuration switch matrix
  • Wire break test current
  • Expandable SPI™ with checksum
  • General-purpose I/O port
  • TSSOP-24 package

Description

The PGA280 is a high-precision instrumentation amplifier with digitally-controllable gain and signal integrity test capability. This device offers low offset voltage, near-zero offset and gain drift, excellent linearity, and nearly no 1/f noise with superior common-mode and supply rejection to support high-resolution precision measurement. The 36-V supply capability and wide, high-impedance input range comply with requirements for universal signal measurement.

Special circuitry prevents inrush currents from multiplexer (MUX) switching. In addition, the input switch matrix enables easy reconfiguration and system-level diagnostics—overload conditions are indicated.

The configurable general-purpose input/output (GPIO) offers several control and communication features. The SPI can be expanded to communicate with more devices, supporting isolation with only four ISO couplers. The PGA280 is available in a TSSOP-24 package and is specified from –40°C to +105°C. For all available packages, see the package option addendum at the end of the data sheet.

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