ADS1191IRSMT

Analog Front End (AFE) Overview

The ADS1191IRSMT is a low-power analog front-end (AFE) designed for biopotential applications, specifically optimized for electrocardiogram (ECG) systems. Manufactured by Texas Instruments, this device integrates two low-noise programmable gain amplifiers (PGAs), right-leg drive circuits, and bias drives. It features a high-resolution sigma-delta analog-to-digital converter capable of sampling rates up to 8 kS/s. The component operates with an analog supply voltage ranging from 2.7 V to 5.25 V and a digital supply voltage between 1.7 V and 3.6 V. It is housed in a compact VQFN-32 package suitable for surface-mount installation.

Analog Front End (AFE) Feature Summary

• Integrated dual-channel biopotential AFE with PGA and reference buffers
• Sigma-Delta ADC architecture supporting up to 8 kS/s data rate
• Low power consumption of 335 uW per channel
• High accuracy with integral nonlinearity (INL) of 15 ppm

Analog Front End (AFE) Applications

• Electrocardiogram (ECG) monitoring systems
• Portable health monitoring devices
• Medical instrumentation requiring low-noise signal acquisition

Analog Front End (AFE) Procurement Notes

Verify the suffix 'MT' indicates tape-and-reel packaging when sourcing. Confirm the specific grade matches application requirements, as operating temperatures range from -40°C to +85°C. Ensure compatibility with the required analog and digital supply voltages during procurement planning.

Analog Front End (AFE) Selection Notes

Select the ADS1191IRSMT for applications requiring integrated ECG front-end functionality with minimal external components. Compare against single-channel alternatives if only one lead is needed. Verify that the VQFN-32 package footprint aligns with PCB layout constraints and thermal management capabilities.

Analog Front End (AFE) Part Context

This part belongs to the ADS119x family of biopotential AFEs from Texas Instruments. It shares architectural similarities with other members like the ADS1191IRSMR but differs in packaging configuration. The series is designed to simplify the design of multi-lead ECG systems by integrating necessary analog front-end circuitry into a single chip.

Analog Front End (AFE) Replacement Considerations

Direct replacements include the ADS1191IRSMR, which offers identical electrical specifications but in a different package format. Other family members such as the ADS1192 or ADS1195 provide additional channels or features but may require schematic adjustments.