ADS1231 - 24-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

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.

Products containing the "ADS1231" keyword are: ADS1231ID , ADS1231ID , ADS1231IDR , ADS1231IDR , ADS1231REF , ADS1231REF

• 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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