ADS1231
24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales
ADS1231
- 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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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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | 24-Bit ADC for Bridge Sensors datasheet (Rev. D) | 30 Oct 2013 | |
Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 18 Mar 2024 | |
Application note | A Basic Guide to Bridge Measurements (Rev. A) | PDF | HTML | 13 Mar 2024 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
Technical article | The real secret to become a better cook. Integrate smart scale technology in kitch | PDF | HTML | 25 Oct 2016 | |
E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 19 Mar 2015 | ||
Application note | Delta-Sigma ADC Design for Bridge Sensor Applications | 30 Sep 2011 | ||
User guide | ADS1x31REF User Guide (Rev. A) | 10 Aug 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ADS1231REF — ADS1231 Evaluation Module
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 (...)
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
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 operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
SOIC (D) | 16 | Ultra Librarian |
Ordering & quality
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- Lead finish/Ball material
- MSL rating/Peak reflow
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- Material content
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- Ongoing reliability monitoring
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Support & training
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