1 Features

• Easy to Use With Only One Register to Program

• Current Consumption as Low as 315 μA (typ)

• Wide Supply Range: 2.3 V to 5.5 V

• Rail-to-Rail Input Buffers to Achieve High Input

Impedance

• Programmable Gains: 1 and 4

• Programmable Data Rates: Up to 1 kSPS

• Up to 20 Bits Effective Resolution

• Simultaneous 50-Hz and 60-Hz Rejection at

20 SPS With Single-Cycle Settling Digital Filter

• Two Differential or Four Single-Ended Inputs

• Internal 2.048-V Reference: 5 ppm/°C (typ) Drift

• Internal 2% Accurate Oscillator

• I2C-Compatible Interface

• Supported I2C Bus Speed Modes:

Standard-Mode, Fast-Mode, Fast-Mode Plus

• 16 Pin-Configurable I2C Addresses

• Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN

2 Applications

• Battery Test Equipment

• Gas Detectors

• Heat Meters

• Optical Modules

• Wearable Fitness and Activity Trackers

3 Description

The ADS1219 is a precision, 24-bit, analog-to-digital

converter (ADC) that includes all features necessary

to implement the most common system monitoring

functions, such as supply voltage, current, and

temperature monitoring. The device features two

differential or four single-ended inputs through a

flexible input multiplexer (MUX), rail-to-rail input

buffers, a programmable gain stage, a voltage

reference, and an oscillator.

The device includes buffers that allow highimpedance

sources to be directly connected to the

device. A gain stage follows the buffers which

provides selectable gains of 1 and 4. The ADS1219

can perform conversions at data rates as high as

1000 samples per second (SPS) with single-cycle

settling. At 20 SPS, the digital filter offers

simultaneous 50-Hz and 60-Hz rejection for noisy

industrial applications.

The ADS1219 features a 2-wire, I2C-compatible

interface that supports I2C bus speeds up to 1 Mbps.

16 different I2C addresses can be selected for the

device via two address pins.

The ADS1219 is offered in a leadless 16-pin WQFN

or a 16-pin TSSOP package and is specified over a

temperature range of –40°C to +125°C.