ADCs offer low power consumption with features to reduce system cost and component count

The ADS114S06B and ADS114S08B, from Texas Instruments, are precision, 16-bit, delta-sigma, ADCs that offer low power consumption and many integrated features to reduce system cost and component count in applications measuring small-signal sensors. These ADCs feature a digital filter that offers low-latency conversion results and 50Hz or 60Hz rejection for noisy industrial environments. A low-noise, PGA provides gains ranging from one to 128 to amplify low-level signals for resistive bridge or thermocouple applications. Additionally, these devices integrate a low-drift, 2.5V reference that reduces printed circuit board (PCB) area. Finally, two programmable excitation current sources allow for easy and accurate RTD biasing. An input multiplexer supports 12 inputs for the ADS114S08B and six inputs for the ADS114S06B that can be connected to the ADC in any combination for design flexibility. In addition, these devices include features such as sensor burn-out detection, voltage bias for thermocouples, system monitoring, and four general-purpose I/Os.