Texas Instruments ADS1232 is precision 24-bit analog-to-digital converters (ADCs). With an onboard, low-noise programmable gain amplifier precision delta-sigma ADC and internal oscillator, the(PGA), ADS1232/4 provide a complete front-end solution for bridge sensor applications including weigh scales, strain gauges and pressure sensors.
The input multiplexer accepts two differential inputs. The ADS1232 also includes an onboard temperature sensor to monitor ambient temperature. The onboard, low-noise PGA has a selectable gain of 1, 2, 64, or 128 supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV. The delta-sigma ADC has 23.5bit effective resolution and is comprised of a 3rd-order modulator and 4th-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1232 can be clocked externally using an oscillator or a crystal. There is also an internal oscillator available that requires no external components. Offset calibration is performed on-demand and the ADS1232/4 can be put in a low-power standby mode or shut off completely in power-down mode. All of the features of the ADS1232/4 are operated through simple pin-driven control.
Complete Front-End for Bridge Sensors
Up to 23.5 Effective Bits
19.2Bit Noise-Free Resolution at Gain = 64
Over 100dB Simultaneous 50Hz and 60Hz Rejection
RMS Noise:
Flexible Clocking:
- 17nV at 10SPS (PGA = 128)
- Low-Drift Onboard Oscillator (±3%)
- 44nV at 80SPS (PGA = 128)
- Optional External Crystal
Selectable Gains of 1, 2, 64, and 128
Selectable 10SPS or 80SPS Data Rates
Easy Ratiometric Measurements–External Voltage Reference up to 5V
Two-Channel Differential Input with Built-In Temperature Sensor
Supply Range: 2.7V to 5.3V
Simple Serial Digital Interface
–40°C to +105°C Temperature Range
Ordering Info.