ADS1231

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24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 1 Sample rate (Max) (kSPS) 0.08 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Rating Catalog Reference mode Ext Input range (Max) (V) 0.0195 Input range (Min) (V) 0 Features 50/60 Hz Rejection, Oscillator, PGA Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 5 Analog voltage AVDD (Min) (V) 3 Analog voltage AVDD (Max) (V) 5.3 Digital supply (Min) (V) 3 Digital supply (Max) (V) 5.3 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

SOIC (D) 16 59 mm² 9.9 x 6 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Complete Front-End for Bridge Sensors
  • Internal Amplifier, Gain of 128
  • Internal Oscillator
  • Low-Side Power Switch for Bridge Sensor
  • Low Noise: 35nVrms
  • Selectable Data Rates: 10SPS or 80SPS
  • Simultaneous 50Hz and 60Hz Rejection at 10SPS
  • Input EMI Filter
  • External Voltage Reference up to 5V for Ratiometric Measurements
  • Simple, Pin-Driven Control
  • Two-Wire Serial Digital Interface
  • Supply Range: 3V to 5.3V
  • Package: SOIC-16
  • Temperature Range: –40°C to +85°C
  • APPLICATIONS
    • Weigh Scales
    • Strain Gauges
    • Load Cells
    • Industrial Process Control

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Description

The ADS1231 is a precision, 24-bit analog-to-digital converter (ADC). With an onboard low-noise amplifier, onboard oscillator, precision third-order 24-bit delta-sigma () modulator, and bridge power switch, the ADS1231 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 128, supporting a full-scale differential input of ±19.5mV. The ADC has 24-bit 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 ADS1231 can be put in a low-power standby mode or shut off completely in power-down mode.

The ADS1231 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 ADS1231 is available in an SO-16 package and is specified from –40°C to +85°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet 24-Bit ADC for Bridge Sensors datasheet (Rev. D) Oct. 30, 2013
White papers Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Technical articles The real secret to become a better cook. Integrate smart scale technology in kitchen appliances. Oct. 25, 2016
White papers Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
Application notes Delta-Sigma ADC Design for Bridge Sensor Applications Sep. 30, 2011
User guides ADS1x31REF User Guide (Rev. A) Aug. 10, 2011

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
49
Description

The ADS1231REF is a circuit board that is designed to feature the ADS1231 24-bit delta-sigma, precision low noise, analog-to digital converter. This board contains the entire circuitry and user interface needed for a weigh-scale digitizer. It is suitable for the general evaluation of the ADS1231 (...)

Features
  • USB connection for firmware updates and remote control
  • Power is applied by either a 9 V battery or wall plug 9 V adapter
  • Connections for load cells and other voltage sources
  • Designed for very low power consumption
  • Eight-digit starburst LCD readout

Design tools & simulation

SIMULATION MODELS Download
SBAM017A.ZIP (35 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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
CALCULATION TOOLS Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 16 View options

Ordering & quality

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