ADS1291IRSMR

Analog Front End (AFE) Overview

The ADS1291IRSMR is a low-power, single-channel analog front-end (AFE) designed for biopotential measurements. It integrates a 24-bit sigma-delta ADC with a programmable gain amplifier (PGA), internal reference, and on-chip oscillator. The device supports data rates up to 3.2 kSPS and operates within an analog supply range of 2.7 V to 5.25 V and a digital supply range of 1.7 V to 3.6 V. Key electrical specifications include a typical power consumption of 495 µW at 1 kSPS and an integral nonlinearity (INL) of 2 ppm. It is housed in a 32-pin VQFN package rated for operation from -40°C to +85°C.

Analog Front End (AFE) Feature Summary

• Single-channel 24-bit simultaneous sampling ADC with integrated PGA
• Low power consumption of 495 µW at 1 kSPS
• Integrated right-leg drive (RLD) amplifier and lead-off detection capability
• Internal clock oscillator and programmable gain settings

Analog Front End (AFE) Applications

• Portable electrocardiogram (ECG) systems
• Holter monitors
• Patient monitoring devices
• Fitness and sports tracking equipment

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'MR' against the manufacturer's official datasheet to confirm package type and tape-and-reel configuration. Ensure compatibility with the required SPI interface voltage levels between the microcontroller and the digital supply rail. Confirm RoHS compliance status through the latest production documentation.

Analog Front End (AFE) Selection Notes

Select this component when a single-channel biopotential acquisition path is sufficient. Compare power consumption metrics against higher-channel variants if system scalability is not required. Verify that the 3.2 kSPS maximum data rate meets the bandwidth requirements of the target application.

Analog Front End (AFE) Part Context

This part belongs to the ADS129x family of analog front-ends from Texas Instruments. It shares architectural similarities with the ADS1292R but differs in channel count. The family is optimized for medical-grade signal acquisition with high resolution and low noise performance suitable for weak bio-signal environments.

Analog Front End (AFE) Replacement Considerations

The ADS1292R serves as a multi-channel alternative within the same family. For single-channel applications requiring different pinouts or packaging, verify cross-reference availability directly from TI documentation.