ADS122U04IRTER

Overview

The ADS122U04IRTER is a low-power, 24-bit analog-to-digital converter (ADC) from Texas Instruments, featuring four input channels and a Sigma-Delta architecture. It supports sampling rates up to 2 kSPS with differential or single-ended inputs. The device operates on analog and digital supply voltages ranging from 2.3 V to 5.5 V and includes an internal oscillator, programmable gain amplifier (PGA), and temperature sensor. It utilizes a UART interface for data communication and is housed in a WQFN-16 package. Key specifications include a gain error of 0.015% and power consumption of 1.4 mW.

Feature Summary

• Integrated excitation current sources (iDACs) for sensor excitation
• Built-in 50/60 Hz rejection capability for noise reduction
• General-purpose input/output (GPIO) pins for system flexibility

Applications

• Industrial process control systems requiring high-resolution signal acquisition
• Portable battery-powered instrumentation due to low power consumption
• Multi-channel sensor interfaces utilizing integrated iDACs

Procurement Notes

Verify the specific suffix 'RTER' corresponds to the reel packaging format when sourcing components. Confirm that the UART interface requirement aligns with the host microcontroller's available serial ports, as this variant differs from I2C versions within the same family. Ensure compatibility with the ADS122U04EVM development kit if initial evaluation is required.

Selection Notes

Select the ADS122U04IRTER over other variants primarily based on the need for a UART interface rather than SPI or I2C. Consider the inclusion of GPIO and iDAC features if external circuitry for sensor excitation or control signals needs to be minimized. Verify that the 24-bit resolution and 2 kSPS speed meet the application's dynamic performance requirements.

Part Context

This component belongs to the ADS122U04 series, which offers 24-bit precision in a small form factor. It is distinct from the ADS122C04 series by its communication interface; while the C04 variant uses I2C, the U04 variant employs UART. Both share similar electrical characteristics, including the 16-WQFN package and low-power operation, but differ in protocol implementation.

Replacement Considerations

The ADS122U04IRTET is a tape-and-reel alternative within the same series. For I2C-based designs, the ADS122C04IRTER serves as a functional substitute with identical electrical parameters but different interface logic.