ADS111x 

Ultra-Small, Low-Power, I2C-Compatible, 860SPS, 16-Bit ADCs with Internal Reference, Oscillator, and Programmable Comparator

1 Features

• Ultra-small packages:

– X2QFN: 2mm × 1.5mm × 0.4mm

– SOT: 2.9mm × 2.8mm × 0.6mm

• Wide supply range: 2.0V to 5.5V

• Low current consumption: 150μA (continuous-conversion mode)

• Programmable data rate: 8SPS to 860SPS

• Single-cycle settling

• Internal low-drift voltage reference

• Internal oscillator

• I2C interface: four pin-selectable addresses

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

• Family of devices:

– ADS1113: one single-ended (SE) or differential (DE) input

– ADS1114: one single-ended or differential input with comparator and PGA

– ADS1115: four single-ended or two differential inputs with comparator and PGA

2 Applications

• Portable instrumentation

• Battery voltage and current monitoring

• Temperature measurement systems

• Consumer electronics

• Factory automation and process control

3 Description

The ADS1113, ADS1114, and ADS1115 (ADS111x) are precision, low-power, 16-bit, I2C-compatible, analog-to-digital converters (ADCs) offered in a leadless X2QFN-10, a SOT-10 package, and a VSSOP-10 package. The ADS111x devices incorporate a low-drift voltage reference and an oscillator. The ADS1114 and ADS1115 also incorporate a programmable gain amplifier (PGA) and a digital comparator. These features, along with a wide operating supply range, are useful for power- and space-constrained, sensor measurement applications.

The ADS111x devices perform conversions at data rates of up to 860 samples per second (SPS). The PGA offers input ranges from ±256mV to ±6.144V, allowing precise large- and small-signal measurements. The ADS1115 features an input multiplexer (MUX) that allows two differential or four single-ended input measurements. Use the digital comparator in the ADS1114 and ADS1115 for undervoltage and overvoltage detection.