ADX112AMSOP10 Sigma-Delta ADC

The ADX112AMSOP10 is a precision,low-power,16-bit analog-to-digital converter(ADC)that provides all features necessary to measure the most common sensor signals in an MSOP-10 package or an ultra￾small,leadless QFN-10 package.The ADX112AMSOP10integrates a programmable gain amplifier(PGA),voltage reference,oscillator,and high-accuracy temperature sensor.These features,along with a wide power supply range from 2V to 5.5V,make the ADX112AMSOP10 ideally suited for power-and space￾constrained,sensor-measurement applications.

The ADX112AMSOP10 can perform conversions at data rates up to 860 samples per second(SPS).The PGA offers input ranges from±256mV to±6.144V,allowing both large and small signals to be measured with high resolution.An input multiplexer(MUX)allows to measure two differential or four single-ended inputs.The high-accuracy temperature sensor can be used for system-level temperature monitoring or cold junction compensation for thermocouples.

The ADX112AMSOP10 operates either in continuous conversion mode,or in a single-shot mode that automatically powers down after a conversion.Single-shot mode significantly reduces current consumption during idle periods.Data are transferred through a serial peripheral interface(SPI™).The ADX112AMSOP10 is specified from–40°C to 125°C.

1.FEATURES

•Ultra-small QFN package:2mm×1.5mm×0.4mm

•Small 3mm×3mm MSOP package

•Wide supply range:2V to 5.5V

•Low current consumption:Continuous mode:Only 145µA Single-shot mode:automatic power-down

•Programmable data rate:8SPS to 860SPS

•Single-cycle settling

•Internal low-drift voltage reference

•Internal oscillator

•SPI-Compatible interface

•Internal PGA

•Four single-ended or two differential inputs

•Operating temperature range:–40°C to 125°C.

2.APPLICATIONS

•Temperature measurement:Thermocouple measurement Cold-junction compensation

Thermistor measurement

•Portable instrumentation

•Battery voltage and current monitoring

•Factory automation and process controls