Overview
The ADS122U04IPW, produced by Texas Instruments, is a precision 24-bit, 4-channel analog-to-digital converter (ADC) designed to measure small sensor signals with high accuracy. This device integrates multiple features to reduce system cost and component count. It includes a flexible input multiplexer, a low-noise programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, and a precision temperature sensor. The ADS122U04IPW is particularly suited for applications requiring precise measurement of sensor signals such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | Up to 2 kSPS (Normal and Turbo modes) | SPS |
| Supply Voltage | 2.3 V to 5.5 V | V |
| Programmable Gain | 1 to 128 | |
| Effective Resolution | Up to 20 Bits | |
| Internal Reference Voltage | 2.048 V | V |
| Internal Oscillator Frequency | 1.024 MHz (Normal mode), 2.048 MHz (Turbo mode) | MHz |
| Temperature Range | –40°C to +125°C | °C |
| Package | 16-pin TSSOP | |
| Current Consumption | As low as 315 µA (typical) | µA |
Key Features
- Wide supply range: 2.3 V to 5.5 V
- Programmable gain: 1 to 128
- Programmable data rates: Up to 2 kSPS
- 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 with 5 ppm/°C drift
- Internal 2% accurate oscillator
- Internal temperature sensor with 0.5°C accuracy
- Three general-purpose inputs/outputs
- 2-wire UART compatible interface with baud rates up to 120 kBaud and auto-baud-rate detection
Applications
- Sensor transducers and transmitters: Temperature, pressure, strain, flow
- PLC and DCS analog input modules
- Temperature controllers
- Climate chambers, industrial ovens
- Patient monitoring systems: Body temperature, blood pressure
Q & A
- What is the resolution of the ADS122U04IPW?
The ADS122U04IPW has a resolution of 24 bits.
- What are the programmable gain options for the ADS122U04IPW?
The programmable gain ranges from 1 to 128.
- What is the maximum data rate of the ADS122U04IPW?
The maximum data rate is up to 2 kSPS in both normal and turbo modes.
- What is the operating temperature range of the ADS122U04IPW?
The operating temperature range is from –40°C to +125°C.
- What types of inputs does the ADS122U04IPW support?
The device supports two differential or four single-ended inputs.
- Does the ADS122U04IPW have internal current sources?
Yes, it has dual-matched programmable current sources ranging from 10 µA to 1.5 mA.
- What is the accuracy of the internal temperature sensor?
The internal temperature sensor has an accuracy of 0.5°C.
- What interface does the ADS122U04IPW use for communication?
The device uses a 2-wire UART compatible interface with baud rates up to 120 kBaud and auto-baud-rate detection.
- What are some common applications of the ADS122U04IPW?
Common applications include sensor transducers and transmitters, PLC and DCS analog input modules, temperature controllers, climate chambers, and patient monitoring systems.
- What is the package type of the ADS122U04IPW?
The ADS122U04IPW is available in a 16-pin TSSOP package.
