ADS114S06IPBSR

The ADS114S06 and ADS114S08 are high-precision 16-bit Δ-Σ ADCs that combine low-power operation with multiple integrated features to reduce system cost and component count in small-signal sensor 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, which is essential for amplifying low-amplitude signals in resistive bridge or thermocouple applications. Both devices also integrate a low-drift 2.5V voltage reference to minimize PCB area. Two programmable IDACs are included to provide accurate RTD biasing. The input multiplexer supports 12 inputs for the ADS114S08 and 6 inputs for the ADS114S06. 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, and four general-purpose I/Os. Both devices are available in an ultra-thin VQFN-32 or TQFP-32 package.

Applications

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

Key features

• Low power consumption: as low as 280μA
• 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 (ADS114S08) or 6 (ADS114S06) independently selectable inputs
• Two matched programmable sensor excitation current sources: 10μA to 2000μA
• Internal reference: 2.5V, maximum drift 10ppm/°C
• Internal oscillator: 4.096MHz, accuracy 1.5%
• Internal temperature sensor
• Enhanced fault detection circuitry
• 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