MAX30009ENA+T

Analog Front End (AFE) Overview

The MAX30009 is a complete bioimpedance (BioZ) analog front-end (AFE) designed for wearable applications. It features a receive channel with ESD protection, EMI filtering, and high input impedance exceeding 1GΩ. The device includes two 20-bit sigma-delta ADCs for simultaneous I and Q acquisition, supporting sample rates from 16sps to 4ksps. The transmit channel generates sine-wave currents ranging from 16nARMS to 1.28mARMS across frequencies of 16Hz to 500kHz. It operates on AVDD and DVDD supplies between 1.7V and 2.2V, consuming 250μW at 1.8V. The component is housed in a 2.03mm x 2.03mm, 25-bump WLP package and functions within a temperature range of -40ºC to +85ºC.

Analog Front End (AFE) Feature Summary

• Simultaneous I and Q measurement capability with 20-bit resolution ADCs
• Programmable sine-wave stimulus current from 16nARMS to 1.28mARMS
• Ultra-low power operation at 250μW (1.8V AVDD) with 0.6μA shutdown current
• Support for bipolar and tetrapolar electrode configurations

Analog Front End (AFE) Applications

• Wearable fitness, wellness, and medical devices
• Multifrequency body composition analyzers
• Non-invasive hemodynamic monitors
• Automatic external defibrillators (AED)

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm RoHS compliance and package variant. Confirm availability status through authorized distributors as supply levels may vary. Ensure the selected part number matches the required thermal and electrical specifications for the target application environment.

Analog Front End (AFE) Selection Notes

Select this AFE for applications requiring high-precision bioimpedance spectroscopy or analysis. Consider the flexible input/output MUX for configuring multiple electrode sets. Evaluate the PLL-based timing subsystem requirements if synchronization with other biosensors like PPG/ECG AFEs is necessary for simultaneous data collection.

Analog Front End (AFE) Part Context

The MAX30009 serves as a specialized analog front-end within Analog Devices' biosensor portfolio. It complements other health monitoring components by providing dedicated bioimpedance measurement capabilities. Its design focuses on enabling small form-factor, battery-operated devices while maintaining clinical-grade accuracy for vital sign monitoring.

Analog Front End (AFE) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.