ADS1258IRTCR

Overview

The ADS1258IRTCR is a 24-bit, low-noise delta-sigma analog-to-digital converter manufactured by Texas Instruments. It features an integrated multiplexer supporting eight differential or sixteen single-ended inputs with a full-scale differential range of 5 V. The device operates on a single 5 V analog supply and a digital interface compatible with 2.7 V to 5.25 V logic levels. It delivers fixed channel sampling rates up to 125 kSPS and supports automatic channel scanning at 23.7 kSPS per channel. The component utilizes a four-order delta-sigma modulator followed by a five-order sinc digital filter for optimized noise performance. It is housed in a 48-VQFN (7x7 mm) package.

Feature Summary

• Integrated flexible input multiplexer allows configuration for either eight differential or sixteen single-ended channels.
• Built-in system monitoring registers provide real-time readback of supply voltage, temperature, reference voltage, gain, and offset data.
• Onboard phase-locked loop generates a system clock from a 32.768 kHz crystal or accepts external clock sources.
• Programmable sensor bias current sources enable sensor biasing and integrity verification.

Applications

• Medical electrocardiogram (ECG/EKG) sensor systems
• Aerospace and avionics instrumentation
• Industrial process control and machine monitoring

Procurement Notes

Verify the specific suffix 'IRTCR' against the manufacturer's official datasheet to confirm the industrial temperature range (-40°C to 105°C) and tape-and-reel packaging format. Ensure compatibility with existing SPI interfaces and power supply rails before integration. Cross-reference the RoHS3 compliance status and moisture sensitivity level (MSL 2) with assembly requirements.

Selection Notes

Select this component when high-resolution 24-bit conversion is required for multi-channel signal acquisition. It is suitable for applications demanding low drift and internal monitoring capabilities. Consider alternative packages such as HTQFP if leaded soldering processes are preferred over QFN reflow techniques. Verify that the 125 kSPS maximum data rate meets the system bandwidth requirements.

Part Context

This part belongs to the ADS1258 family of precision analog-to-digital converters. It shares architectural similarities with other devices in the series but is distinguished by its specific package type and temperature rating. The IRTC suffix denotes the industrial grade variant packaged in a reel for automated surface-mount assembly.

Replacement Considerations

The SC1642 is documented as a pin-to-pin compatible alternative. Verify electrical parameter alignment and software register compatibility before substitution. Other ADS1258 variants may differ in package style or temperature range.