ADS1191IPBSR

Analog Front End (AFE) Overview

The ADS1191IPBSR is a single-channel biopotential analog front-end (AFE) manufactured by Texas Instruments. It integrates a low-noise programmable gain amplifier (PGA), right-leg drive (RLD) buffers, and a 16-bit sigma-delta analog-to-digital converter (ADC). The device supports sampling rates from 125 samples per second to 8 kS/s with a differential input architecture. 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. The component communicates via a serial peripheral interface (SPI) and is housed in a TQFP-32 package suitable for surface-mount installation.

Analog Front End (AFE) Feature Summary

• Integrated 16-bit sigma-delta ADC with integral nonlinearity of 15 ppm
• Single-channel biopotential AFE with PGA and RLD buffers
• Low power consumption of 335 µW at typical operating conditions
• Operates within -40°C to +85°C temperature range

Analog Front End (AFE) Applications

• Electrocardiogram (ECG) monitoring systems
• Electromyography (EMG) signal acquisition
• Electroencephalography (EEG) data collection
• Portable medical diagnostic devices

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'R' indicates reel packaging when sourcing. Confirm the TQFP-32 package type matches the target PCB footprint. Ensure voltage levels align with the specified analog (2.7 V–5.25 V) and digital (1.7 V–3.6 V) supply requirements. Check humidity sensitivity handling instructions if storage conditions exceed manufacturer guidelines.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring a single-channel high-resolution biopotential measurement. The 16-bit resolution and 8 kS/s maximum sampling rate suit standard physiological signal bandwidths. Consider the separate analog and digital supply rails for power management design. Verify SPI compatibility with the host microcontroller for register configuration and data readout.

Analog Front End (AFE) Part Context

This part belongs to the ADS1191 family of integrated analog front-ends designed for biopotential measurements. It serves as a specialized solution for capturing weak biological signals with high precision. The IPBSR designation identifies the specific package variant and tape-and-reel delivery format within the Texas Instruments product line.

Analog Front End (AFE) Replacement Considerations

Consult official cross-reference lists for direct pin-compatible alternatives. Verify that any substitute maintains the 16-bit resolution and single-channel architecture. Ensure the replacement supports the required SPI interface and supply voltage ranges.