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.