AFE4403YZPT

Analog Front End (AFE) Overview

The AFE4403YZPT is an ultra-small, integrated analog front-end (AFE) designed for heart rate monitors and low-cost pulse oximeters. It features a single-channel, low-noise receiver with a 22-bit Sigma-Delta ADC operating at up to 2 kS/s. The device integrates LED drivers and sensor bias circuits within a 36-pin DSBGA package measuring 3.07 x 3.07 x 0.31 mm. It operates on a single supply voltage ranging from 2 V to 3.6 V for both analog and digital sections, supporting serial SPI communication.

Analog Front End (AFE) Feature Summary

• Integrated 22-bit Sigma-Delta ADC with 2 kS/s sampling rate
• Ultra-small 36-pin DSBGA package (3.07 x 3.07 x 0.31 mm)
• Single-channel low-noise receiver with integrated LED drivers
• Operates on 2 V to 3.6 V single supply

Analog Front End (AFE) Applications

• Medical pulse oximeters
• Optical heart rate monitors (HRM)
• Industrial photometers

Analog Front End (AFE) Procurement Notes

Verify the suffix 'YZPT' indicates the tape-and-reel packaging variant distinct from the cut-tape or mouse-reel options. Confirm the specific revision level against the manufacturer datasheet to ensure compatibility with existing firmware and hardware designs. Check for any recent production lifecycle notices regarding availability.

Analog Front End (AFE) Selection Notes

Select this component when a compact form factor is critical for wearable or portable medical devices. The 22-bit resolution and high SNR are suitable for applications requiring precise optical signal detection. Ensure the system design supports the required SPI interface and provides adequate power filtering for the 2-3.6 V operating range.

Analog Front End (AFE) Part Context

This part belongs to the AFE4403 family of Texas Instruments analog front-ends. It is specifically optimized for optical sensing applications where size and power consumption are primary constraints. The YZPT designation identifies the specific packaging and reel configuration for automated assembly processes.

Analog Front End (AFE) Replacement Considerations

Direct substitutes include other variants in the AFE4403 series such as AFE4403YZPR or AFE4403YZP, differing primarily in packaging format. For higher channel counts, consider the AFE4432 series, though pinout and software compatibility may require redesign.