1. Product Characteristics
Low current consumption: as low as 120 μA (typical) in duty cycle mode
Power supply range:3V~5 V
Up to 20-bit effective resolution with two differential or four single-ended inputs
Dual matched programmable current sources: 10 µA to 1.5 mA
Internal 2.048-V reference: 5 ppm/°C (typical) drift
Internal 2% precision oscillator
Internal temperature sensor: 0.5°C (typical) accuracy
SPI compatible interface (mode 1)

2. Product Applications
Temperature Sensor Measurement.
W1G Electro7
YouXin Electroni!
-Thermistor
-Thermocouple
Resistance Temperature Detectors (RTD): 2, 3 or 4 wire type 2 wire bridge Sensor Measurement: -Pressure Sensor
-Pressure transducers
-Strain Gauges
-Scales
Portable Instruments
Factory automation and process control

3.Description
The ADS1220 is a precision 24-bit analogue-to-digital converter (ADC) that provides a number of integrated features to reduce system cost and part counts for measuring small sensor signals.

The device implements two differential or four single-ended inputs via a flexible input multiplexer (MUX), whisper, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.

The device can convert at a data rate of 2000 samples per second (SPS) with single-cycle settling. At 20 SP, digital filters provide simultaneous 50 Hz and 60 Hz rejection for noisy industrial applications.

The internal PGA provides high gain to 128 V/V.

The PGA makes the ADS1220 ideally suited for applications that measure small sensor signals such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistance bridge sensors.