ADS1191IRSMR

Analog Front End (AFE) Overview

The ADS1191IRSMR is a low-power analog front-end (AFE) designed for biopotential applications, specifically ECG. Manufactured by Texas Instruments, it integrates two low-noise programmable gain amplifiers (PGAs), right-leg drive circuits, and bias drives. The device features two 24-bit sigma-delta ADCs with a maximum sampling rate of 8 kS/s. It operates on an analog supply voltage ranging from 2.7 V to 5.25 V and a digital supply voltage from 1.7 V to 3.6 V. Key electrical parameters include a power consumption of 335 µW and an integral nonlinearity (INL) of 15 ppm. The component is housed in a VQFN-32 package and functions within a temperature range of -40°C to +85°C.

Analog Front End (AFE) Feature Summary

• Integrated dual-channel 24-bit sigma-delta ADCs with up to 8 kS/s sampling rate
• Low power consumption of 335 µW per channel
• Biopotential AFE with integrated PGAs, right-leg drive, and bias drives
• VQFN-32 surface-mount package suitable for compact designs

Analog Front End (AFE) Applications

• Electrocardiogram (ECG) systems
• Portable patient monitoring devices
• Holter monitors

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix 'IRSMR' against the manufacturer's current datasheet to confirm package type, tape-and-reel quantity, and temperature grade. Ensure compatibility with the required analog and digital supply voltages during procurement planning. Cross-reference the Mouser part number 595-ADS1191IRSMR for accurate product identification.

Analog Front End (AFE) Selection Notes

Select this component when designing single-lead or dual-lead ECG systems requiring low power and high resolution. The ADS1191IRSMR is appropriate for battery-operated medical devices due to its 335 µW power consumption. Verify that the system requires only two channels; if more channels are needed, consider higher-channel variants within the ADS119x family. Ensure the PCB layout supports the VQFN-32 thermal requirements.

Analog Front End (AFE) Part Context

The ADS1191 belongs to the ADS119x series of biopotential analog front-ends from Texas Instruments. This series is engineered for medical instrumentation, offering integrated signal conditioning and digitization. The IRSMR suffix denotes the specific VQFN-32 package variant with reel packaging, distinguishing it from other package options like the QFN or WQFN found in related models.

Analog Front End (AFE) Replacement Considerations

Direct pin-to-pin replacements within the same family include the ADS1192 and ADS1198, which offer additional channels. For single-channel applications, the ADS1191 may be substituted with other TI AFEs if channel count is not a constraint. Verify register compatibility and PGA specifications when cross-referencing with other biopotential AFEs.