AFE4403YZPR

Analog Front End (AFE) Overview

The AFE4403YZPR is an ultra-small, integrated analog front-end (AFE) designed for heart rate monitors and low-cost pulse oximeters. Manufactured by Texas Instruments, it features a single-channel architecture with a 22-bit resolution Sigma-Delta ADC. The device operates on a supply voltage range of 2 V to 3.6 V and supports SPI serial interface communication. It integrates a low-noise receiver channel, LED driver, and sensor components within a compact 36-pin DSBGA package measuring 3.07 x 3.07 x 0.31 mm.

Analog Front End (AFE) Feature Summary

• Integrates a low-noise receiver channel with a 22-bit Sigma-Delta ADC
• Includes dedicated LED transmitter section for optical sensing
• Ultra-small 36-pin DSBGA package (3.07 x 3.07 x 0.31 mm)
• Operates on 2 V to 3.6 V power supply with SPI interface

Analog Front End (AFE) Applications

• Pulse oximeters
• Heart rate monitors
• Industrial photometers

Analog Front End (AFE) Procurement Notes

Verify the suffix 'YZPR' corresponds to the tape-and-reel packaging configuration when ordering. Confirm that the specific revision matches the design requirements, as revisions may update electrical characteristics or pin definitions without changing the base part number. Ensure compatibility with the required operating temperature range of -20°C to +70°C.

Analog Front End (AFE) Selection Notes

Select the AFE4403YZPR for applications requiring high-resolution optical signal acquisition in space-constrained designs. The 22-bit resolution supports precise detection of small physiological signals. Compare against the AFE4405 if lower cost or different interface options are prioritized over maximum resolution. Ensure the host microcontroller supports the SPI protocol for data retrieval.

Analog Front End (AFE) Part Context

The AFE4403 belongs to Texas Instruments' family of integrated analog front-ends for biometric monitoring. The YZPR suffix indicates the reel packaging variant, distinct from the cut-tape YZPT version. This component is specifically optimized for wearable and portable medical devices where size and power efficiency are critical constraints.

Analog Front End (AFE) Replacement Considerations

The AFE4403YZPT is a compatible alternative offering identical functionality but supplied in cut-tape packaging instead of reels. No other direct functional substitutes are confirmed in the provided documentation.