ADX111AMSOP10 Sigma-Delta ADC-AnalogySemi

The ADX111 device is precision, low-power, 16-bit,

I 2 C-compatible, analog-to-digital converter (ADC)

offered with MSOP-10 and QFN-10 packages. The

ADX111 device incorporates a low-drift voltage

reference and an oscillator. It also incorporates a

programmable gain amplifier (PGA) and a digital

comparator. These features, along with a wide

operating supply range, make the ADX111 well

suited for power- and space-constrained, sensor

measurement applications.

The ADX111 performs conversions at data rates up

to 860 samples per second (SPS). Internal digital

filter provides flexible output data rate, from 8SPS

to 860SPS. The PGA offers input ranges from

±256mV to ±6.144V, allowing precise large- and

small-signal measurements. The ADX111 features

an input multiplexer (MUX) that allows two

differential or four single-ended input

measurements. Use the digital comparator in the

ADX111 for under- and overvoltage detection.

The ADX111 operates in either continuous-

conversion mode or single-shot mode. The internal

filter is single-cycle settling in both modes. The

devices are automatically powered down after

one conversion in single-shot mode; therefore,

power consumption is significantly reduced

during idle periods. See Table 1 for the order

information.

1. FEATURES

• Small 3mm × 3mm MSOP package

• Ultra-small QFN package:

2mm × 1.5mm × 0.4mm

• Wide supply range: 2.0V to 5.5V

• Low current consumption: 145µA

(continuous-conversion mode)

• Programmable output data rate: 8SPS to

860SPS

• Single-cycle settling

• Internal low-drift voltage reference

• Internal oscillator

• I 2 C interface: four pin-selectable addresses

• Four single-ended or two differential inputs

• Programmable comparator

• Operating temperature range:

–40°C to 125°C

2. APPLICATIONS

• Portable Instrumentation

• Battery Voltage and Current Monitoring

• Temperature Measurement Systems

• Consumer Electronics

• Factory Automation and Process Control