ADS1219 - 24-bit, 1kSPS, 4-ch general-purpose delta-sigma ADC with I2C interface and external Vref inputs

The ADS1219 is a precision, 24-bit,analog-to-digital converter (ADC) that includes all features necessary to implement the most commonsystem monitoring functions, such as supply voltage, current, and temperature monitoring. Thedevice 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 anoscillator.

The device includes buffers that allow high-impedance sources to be directly connected tothe device. A gain stage follows the buffers which provides selectable gains of 1 and 4. TheADS1219 can perform conversions at data rates as high as 1000 samples persecond (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hzand 60-Hz rejection for noisy industrial applications.

The ADS1219 features a 2-wire,I²C-compatible interface that supports I²Cbus speeds up to 1 Mbps. 16 different I²C addresses can be selected forthe device via two address pins.

The ADS1219 is offered in a leadless 16-pin WQFN or a 16-pin TSSOPpackage and is specified over a temperature range of –40°C to +125°C.

• 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

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