TI ADS124S08IRHBR

The ADS124S06 and ADS124S08 are high-precision 24-bit Δ-Σ ADCs that combine low power consumption with multiple integrated features to reduce system cost and component count in small sensor signal measurement applications. Both ADCs feature a configurable digital filter that provides low-latency conversion results and 50Hz or 60Hz noise rejection in noisy industrial environments. The PGA offers low-noise performance with selectable gains from 1 to 128, enabling amplification of low-level signals in resistive bridge or thermocouple applications. Additionally, both devices integrate a low-drift 2.5V voltage reference to minimize PCB area. Two programmable IDACs are also included for accurate RTD biasing. The input multiplexer supports 12 inputs for the ADS124S08 and 6 inputs for the ADS124S06. These inputs can be connected to the ADC in any combination, enhancing design flexibility. Both devices also include sensor burn-out detection, thermocouple voltage biasing, system monitoring functions, and four general-purpose I/Os. Both devices are available in an ultra-thin VQFN-32 or TQFP-32 package.

• Low power consumption: as low as 280μA
• Low-noise PGA: 19nV_RMS (at gain = 128)
• Programmable gain: 1 to 128
• Programmable data rate: 2.5SPS to 4kSPS
• Low-latency digital filter with simultaneous 50Hz and 60Hz rejection at ≤20SPS
• Analog multiplexer with 12 independently selectable inputs (ADS124S08) or 6 (ADS124S06)
• Two matched, programmable sensor excitation current sources: 10μA to 2000μA
• Internal reference: 2.5V, max drift 10ppm/°C
• Internal oscillator: 4.096MHz, ±1.5% accuracy
• Internal temperature sensor
• Enhanced fault detection
• Self offset calibration and system calibration
• 4 general-purpose I/Os
• SPI-compatible interface with optional CRC
• Analog supply: unipolar (2.7V to 5.25V) or bipolar (±2.5V)
• Digital supply: 2.7V to 3.6V
• Operating temperature: -50°C to +125°C

• Sensors and transmitters: temperature, pressure, stress, flow
• PLC and DCS
• Analog input modules
• Temperature controllers
• Environmental test chambers, industrial ovens