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PGA281

ACTIVE

Zero-Drift, High Voltage Programmable Gain Amplifier

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Data sheet

PGA281

ACTIVE
Data sheet Order now

Product details

PGA/VGA PGA Number of channels 1 Vs (min) (V) 10 Vs (max) (V) 36 Input type Differential Output type Differential Vos (offset voltage at 25°C) (typ) (mV) 0.0053 Input offset drift (±) (typ) (µV/°C) 0.03 Input voltage noise (typ) (µV√Hz) 0.022 Interface type GPIO Noise at 1 kHz (typ) (V√Hz) 0.00000002 BW at Acl (MHz) 6 Acl, min spec gain (V/V) 0.125 Architecture CMOS Features EMI filtering Slew rate (typ) (V/µs) 1 Iq per channel (typ) (mA) 3.15 Gain (max) (dB) 42 Gain error (typ) (%) 0.03 Gain drift (max) (ppm/°C) 3 Rating Catalog Operating temperature range (°C) -40 to 125
PGA/VGA PGA Number of channels 1 Vs (min) (V) 10 Vs (max) (V) 36 Input type Differential Output type Differential Vos (offset voltage at 25°C) (typ) (mV) 0.0053 Input offset drift (±) (typ) (µV/°C) 0.03 Input voltage noise (typ) (µV√Hz) 0.022 Interface type GPIO Noise at 1 kHz (typ) (V√Hz) 0.00000002 BW at Acl (MHz) 6 Acl, min spec gain (V/V) 0.125 Architecture CMOS Features EMI filtering Slew rate (typ) (V/µs) 1 Iq per channel (typ) (mA) 3.15 Gain (max) (dB) 42 Gain error (typ) (%) 0.03 Gain drift (max) (ppm/°C) 3 Rating Catalog Operating temperature range (°C) -40 to 125
TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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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* Data sheet Precision, Zero-Drift, High-Voltage, Programmable Gain Instrumentation Amplifier datasheet (Rev. A) 21 Jun 2013
Analog Design Journal Precision signal conditioning for safety-enabled AIMs in factory automation 30 Sep 2019
EVM User's 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.

User guide: PDF
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Simulation model

PGA281 PSpice Model (Rev. B)

SBOM815B.ZIP (135 KB) - PSpice Model
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Simulation model

PGA281 TINA-TI Reference Design

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

PGA281 TINA-TI Spice Model

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

TIPD135 — 10 µA to 100 mA, 0.05% error, high-side current sensing reference design

This 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 (...)
User guide: PDF
Schematic: PDF
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TSSOP (PW) 16 Ultra Librarian
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