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ADS1131
  • ADS1131
  • ADS1131
  • ADS1131

ADS1131

ACTIVE

18-Bit, 80SPS, 1-Ch Delta-Sigma ADC w/ Powerdown Switch for Resistive Bridge Sensors & Weigh Scales

Texas Instruments ADS1131 Product Info

1 April 2026 4

Parameters

Resolution (Bits)

18

Sample rate (max) (ksps)

0.08

Number of input channels

1

Interface type

SPI

Architecture

Delta-Sigma

Input type

Differential, Single-ended

Rating

Catalog

Reference mode

External

Input voltage range (max) (V)

0.041

Input voltage range (min) (V)

0

Features

50/60 Hz Rejection, Oscillator, PGA

Operating temperature range (°C)

-40 to 85

Power consumption (typ) (mW)

2.9

Analog supply voltage (min) (V)

3

Analog supply voltage (max) (V)

5.3

Digital supply (min) (V)

3

Digital supply (max) (V)

5.3

Package

SOIC (D)-16-59.4 mm² 9.9 x 6

Features

  • Complete Front-End for Bridge Sensors
  • Available in an SO Package
  • Internal Amplifier, Gain of 64
  • Internal Oscillator
  • Low-Side Power Switch for Bridge Sensor
  • 18-Bit Noise-Free Resolution
  • Selectable 10SPS or 80SPS Data Rates
  • Simultaneous 50Hz and 60Hz Rejection at 10SPS
  • External Voltage Reference up to 5V for Ratiometric Measurements
  • Simple, Pin-Driven Control
  • Two-Wire Serial Digital Interface
  • Supply Range: 3V to 5.3V
  • –40°C to +85°C Temperature Range
  • Complete Front-End for Bridge Sensors
  • Available in an SO Package
  • Internal Amplifier, Gain of 64
  • Internal Oscillator
  • Low-Side Power Switch for Bridge Sensor
  • 18-Bit Noise-Free Resolution
  • Selectable 10SPS or 80SPS Data Rates
  • Simultaneous 50Hz and 60Hz Rejection at 10SPS
  • External Voltage Reference up to 5V for Ratiometric Measurements
  • Simple, Pin-Driven Control
  • Two-Wire Serial Digital Interface
  • Supply Range: 3V to 5.3V
  • –40°C to +85°C Temperature Range

Description

The ADS1131 is a precision, 18-bit analog-to-digital converter (ADC). With an onboard, low-noise amplifier, onboard oscillator, precision 18-bit delta-sigma (ΔΣ) ADC, and bridge power switch, the ADS1131 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and load cells.

The low-noise amplifier has a gain of 64, supporting a full-scale differential input of ±39mV. The ΔΣ ADC has 18-bit effective resolution and is comprised of a third-order modulator and fourth-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1131 can be put into a low-power standby mode or shut off completely in power-down mode.

The ADS1131 is controlled by dedicated pins; there are no digital registers to program. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers.

The ADS1131 is available in an SO-16 package and is specified from –40°C to +85°C.

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