Overview
The ADS1220IRVAT is a precision, 24-bit analog-to-digital converter (ADC) produced by Texas Instruments. This device is designed to reduce system cost and component count in applications that require the measurement of small sensor signals. It features a flexible input multiplexer (MUX), a low-noise programmable gain amplifier (PGA), two programmable excitation current sources, an internal voltage reference, an oscillator, a low-side switch, and a precision temperature sensor. The ADS1220IRVAT can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling and offers simultaneous 50-Hz and 60-Hz rejection at 20 SPS, making it ideal for noisy industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | Up to 2 kSPS | SPS |
| Supply Voltage Range | 2.3 V to 5.5 V | V |
| Programmable Gain | 1 V/V to 128 V/V | V/V |
| Input Current | As low as 120 µA (typ) in Duty-Cycle Mode | µA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | VQFN-16 | |
| Package Size | 3.5-mm × 3.5-mm × 0.9-mm | mm |
| Internal Reference Voltage | 2.048 V, 5 ppm/°C (typ) Drift | V, ppm/°C |
| Internal Oscillator Accuracy | 2% (typ) | % |
| Internal Temperature Sensor Accuracy | 0.5°C (typ) | °C |
Key Features
- Low Current Consumption: As low as 120 µA (typ) in Duty-Cycle Mode
- Wide Supply Range: 2.3 V to 5.5 V
- Programmable Gain: 1 V/V to 128 V/V
- Programmable Data Rates: Up to 2 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
- Dual Matched Programmable Current Sources: 10 µA to 1.5 mA
- Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
- Internal 2% Accurate Oscillator
- Internal Temperature Sensor: 0.5°C (typ) Accuracy
- SPI-Compatible Interface (Mode 1)
Applications
- Temperature Sensor Measurements: Thermistors, Thermocouples, Resistance Temperature Detectors (RTDs) - 2-, 3-, or 4-Wire Types
- Resistive Bridge Sensor Measurements: Pressure Sensors, Strain Gauges, Weigh Scales
- Portable Instrumentation
- Factory Automation and Process Control
Q & A
- What is the resolution of the ADS1220IRVAT?
The ADS1220IRVAT has a resolution of 24 bits.
- What are the programmable gain options for the ADS1220IRVAT?
The programmable gain ranges from 1 V/V to 128 V/V.
- What is the maximum data rate of the ADS1220IRVAT?
The maximum data rate is up to 2 kSPS.
- What is the operating temperature range of the ADS1220IRVAT?
The operating temperature range is –40°C to +125°C.
- What types of inputs does the ADS1220IRVAT support?
The device supports two differential or four single-ended inputs.
- What is the accuracy of the internal temperature sensor?
The internal temperature sensor has an accuracy of 0.5°C (typ).
- Does the ADS1220IRVAT have an internal oscillator?
Yes, it has an internal 2% accurate oscillator.
- What is the power consumption in duty-cycle mode?
The power consumption is as low as 120 µA (typ) in duty-cycle mode.
- What interface does the ADS1220IRVAT use for communication?
The device uses an SPI-compatible interface (Mode 1).
- What are some common applications of the ADS1220IRVAT?
Common applications include temperature sensor measurements, resistive bridge sensor measurements, portable instrumentation, and factory automation and process control.
