Overview
The ADS122C04IPW 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, a voltage reference, an oscillator, and a precision temperature sensor. The ADS122C04IPW is suitable for various applications, including field transmitters, PLC and DCS analog input modules, temperature controllers, heat meters, and patient monitoring systems.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 Bits |
| Data Rate | Up to 2 kSPS |
| Effective Resolution | Up to 20 Bits |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Programmable Gain | 1 to 128 |
| Input Configuration | Two Differential or Four Single-Ended Inputs |
| Excitation Current Sources | 10 µA to 1.5 mA |
| Internal Reference | 2.048-V, 5 ppm/°C (typ) Drift |
| Internal Oscillator Accuracy | ±2% (typ) |
| Internal Temperature Sensor Accuracy | 0.5°C (typ) |
| I2C Interface | Supports Standard-Mode, Fast-Mode, Fast-Mode Plus up to 1 Mbps |
| Package Options | 16-pin WQFN, 16-pin TSSOP |
| Operating Temperature Range | –40°C to +125°C |
Key Features
- Current consumption as low as 315 µA (typ)
- 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
- 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
- I2C-compatible interface with 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
- Resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors
Q & A
- What is the resolution of the ADS122C04IPW ADC?
The ADS122C04IPW has a resolution of 24 bits.
- What are the programmable gain options for the ADS122C04IPW?
The programmable gain ranges from 1 to 128.
- What is the maximum data rate of the ADS122C04IPW?
The maximum data rate is up to 2 kSPS.
- What types of inputs does the ADS122C04IPW 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).
- What are the supported I2C bus speed modes?
The device supports Standard-Mode, Fast-Mode, and Fast-Mode Plus up to 1 Mbps.
- What are the package options for the ADS122C04IPW?
The device is available in 16-pin WQFN and 16-pin TSSOP packages.
- What is the operating temperature range of the ADS122C04IPW?
The operating temperature range is –40°C to +125°C.
- How many I2C addresses can be configured for the ADS122C04IPW?
The device allows configuration of 16 different I2C addresses.
- What is the typical current consumption of the ADS122C04IPW?
The typical current consumption is as low as 315 µA.
