Overview
The ADS122C04IPWR, produced by Texas Instruments, is a precision 24-bit analog-to-digital converter (ADC) designed to measure small sensor signals with high accuracy. This device is part of the ADS122C04 family and is packaged in a 16-pin WQFN or TSSOP package. It features a wide supply range of 2.3 V to 5.5 V, making it versatile for various applications. The ADS122C04IPWR integrates multiple functions, including a programmable gain amplifier (PGA), dual-matched programmable current sources, an internal voltage reference, an oscillator, and a precision temperature sensor. This integration reduces system cost and component count, making it ideal for industrial and medical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | Up to 2000 SPS (Turbo mode) | |
| Programmable Gain | 1 to 128 | |
| Supply Voltage Range | 2.3 V to 5.5 V | V |
| Effective Resolution | Up to 20 Bits | |
| Input Types | Two differential or four single-ended inputs | |
| Internal Reference | 2.048 V, 5 ppm/°C (typ) drift | V |
| Temperature Sensor Accuracy | ±0.5°C (typ) at TA = 0°C to +85°C | °C |
| I2C Interface | Standard-Mode, Fast-Mode, Fast-Mode Plus | |
| Package | 16-pin WQFN or TSSOP | |
| Operating Temperature Range | –40°C to +125°C | °C |
Key Features
- Low current consumption as low as 315 µA (typ)
- Programmable gain amplifier (PGA) with gains up to 128
- Dual-matched programmable current sources (10 µA to 1.5 mA)
- Internal 2.048-V reference with 5 ppm/°C (typ) drift
- Internal 2% accurate oscillator
- Precision temperature sensor with 0.5°C (typ) accuracy
- I2C-compatible interface supporting up to 1 Mbps
- Simultaneous 50-Hz and 60-Hz rejection at 20 SPS with single-cycle settling digital filter
- 16 pin-configurable I2C addresses
Applications
- Field transmitters for temperature, pressure, strain, and flow measurements
- PLC and DCS analog input modules
- Temperature controllers
- Heat meters
- Patient monitoring systems for body temperature and blood pressure
Q & A
- What is the resolution of the ADS122C04IPWR?
The ADS122C04IPWR has a resolution of 24 bits.
- What are the programmable gain options for the ADS122C04IPWR?
The device offers programmable gains from 1 to 128.
- What is the maximum data rate of the ADS122C04IPWR?
The maximum data rate is up to 2000 samples-per-second (SPS) in Turbo mode.
- What types of inputs does the ADS122C04IPWR 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) at TA = 0°C to +85°C.
- What are the supported I2C bus speed modes?
The device supports Standard-Mode, Fast-Mode, and Fast-Mode Plus I2C bus speeds.
- What is the operating temperature range of the ADS122C04IPWR?
The operating temperature range is –40°C to +125°C.
- What are the package options for the ADS122C04IPWR?
The device is available in 16-pin WQFN or TSSOP packages.
- What are some typical applications of the ADS122C04IPWR?
Typical applications include field transmitters, PLC and DCS analog input modules, temperature controllers, heat meters, and patient monitoring systems.
- How does the ADS122C04IPWR handle noise rejection?
The device offers simultaneous 50-Hz and 60-Hz rejection at 20 SPS with single-cycle settling digital filter.
