ADS1231

ADS1231 www.ti.com SBAS414D – JULY 2009 – REVISED OCTOBER 2013 24-Bit Analog-to-Digital Converter for Bridge Sensors Check for Samples: ADS1231 FEATURES 1 2 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 DESCRIPTION The ADS1231 is a precision, 24-bit analog-to-digital converter (ADC). With an onboard low-noise amplifier, onboard oscillator, precision third-order 24bit delta-sigma (ΔΣ) 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 ΔΣ 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 ded...