ADS122U04IPWR

Overview

The ADS122U04IPWR is a 24-bit delta-sigma analog-to-digital converter (ADC) from Texas Instruments, housed in a 16-pin TSSOP package. It features four differential or single-ended input channels with a maximum sampling rate of 2 kSPS. The device integrates a programmable gain amplifier (PGA), an internal voltage reference, and excitation current sources (iDACs). Communication is handled via a UART interface. It operates on supply voltages ranging from 2.3 V to 5.5 V for both analog and digital domains, supporting an industrial temperature range of -40°C to +125°C.

Feature Summary

• Integrates a programmable gain amplifier and excitation current sources to reduce external component count
• Supports flexible input configurations including differential and single-ended modes
• Includes built-in 50/60 Hz rejection capabilities for noise suppression

Applications

• Industrial process control systems requiring high-resolution signal acquisition
• Portable battery-powered instrumentation due to low power consumption
• Weight scales and load cell measurement applications utilizing iDACs

Procurement Notes

Verify the specific suffix IPWR corresponds to the TSSOP-16 package variant when sourcing. Confirm that the UART interface requirement aligns with the host microcontroller's available communication protocols, as this differs from I2C or SPI variants within the same family. Ensure environmental compliance documentation matches project specifications.

Selection Notes

Select this model over I2C-based counterparts like the ADS122C04 if UART connectivity is preferred or required by the system architecture. Consider the ADS122S14 if higher throughput up to 64 kSPS is necessary, noting the difference in channel count and interface type. Evaluate the PGA gain settings against the expected input signal amplitude to optimize dynamic range.

Part Context

This component belongs to the ADS122U04 series of low-power, small-size ADCs designed for precision measurements. It shares architectural similarities with other members of the family but is distinguished by its UART interface and four-channel configuration. The IPWR suffix specifically denotes the surface-mount TSSOP packaging option suitable for automated assembly processes.

Replacement Considerations

The ADS122U04IRTER serves as a pin-compatible alternative featuring the same functionality but packaged in a WQFN-16 form factor. Designers must adjust the PCB footprint layout when substituting between TSSOP and WQFN packages despite identical electrical characteristics.