ADS122U04IRTET

Overview

The ADS122U04IRTET is a 24-bit, low-power sigma-delta analog-to-digital converter (ADC) from Texas Instruments. It features four input channels with a maximum sampling rate of 2 kSPS and supports both differential and single-ended inputs. The device integrates a programmable gain amplifier (PGA), internal voltage reference, excitation current sources (iDACs), GPIO, oscillator, and temperature sensor. Communication is handled via a UART interface. It operates on analog and digital supply voltages ranging from 2.3 V to 5.5 V, with a typical power consumption of 1.4 mW. The component is housed in a 16-WQFN package and functions within an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 24-bit sigma-delta ADC with a programmable gain amplifier for high-resolution signal acquisition.
• Includes built-in excitation current sources (iDACs) suitable for direct sensor interfacing without external components.
• Features a UART communication interface for simplified data transfer and system integration.

Applications

• Industrial measurement systems requiring high-precision analog signal digitization
• Medical devices utilizing thermocouples or other low-level sensor inputs
• Battery-powered consumer electronics needing low-power, high-resolution data conversion

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and tape-and-reel specifications. Confirm that the UART interface configuration aligns with the host microcontroller's serial port capabilities before finalizing procurement decisions.

Selection Notes

Select this component when a 24-bit resolution and integrated PGA are required for small-signal measurements. Ensure the host system supports UART communication rather than SPI or I2C. Consider the 1.4 mW power consumption for battery-operated designs and verify that the 2 kSPS maximum data rate meets the application's bandwidth requirements.

Part Context

This part belongs to the ADS122U04 series of 24-bit delta-sigma ADCs. It is designed to reduce system cost and component count by integrating multiple front-end functions into a single small package. The device is commonly used in applications where high accuracy and low power consumption are critical design constraints.

Replacement Considerations

The ADS122C04IRTET is a related variant within the same family but utilizes an I2C interface instead of UART. Verify interface compatibility with the host controller before substituting. No other direct pin-to-pin replacements with identical interfaces are confirmed in public documentation.