The MAX30009 is a complete Bioimpedance (BioZ) Analog Front-End (AFE) solution for wearable applications. It
offers high performance for fitness, wellness, and clinical applications, and ultra-low power for long battery life. The
BioZ receive channel has Electrostatic Discharge (ESD) protection, Electromagnetic Interference (EMI) filtering, internal lead-biasing, DC leads-off detection, DRVN lead-off detection, and ultra-low power lead-on detection during
standby mode. The BioZ receive channel also has high input impedance, low noise, high Common-Mode Rejection
Ratio (CMRR), programmable gain, various low-pass and high-pass filter options, and two high resolution analog-to-digital converters for simultaneous I and Q acquisition.
The BioZ transmit channel has a sine-wave current generator to drive AC currents into the body with a wide frequency range of 16Hz to 806kHz and a wide magnitude range of 16nARMS to 1.28mARMS. The transmit channel can also operate in the sine-wave voltage and H-bridge modes. The flexible input/output MUX allows for both bipolar and tetrapolar measurements with multiple sets of electrodes.
For measurements requiring high absolute impedance accuracy such as Bioimpedance Analysis/Spectroscopy
(BIA/BIS) and Automated External Defibrillator (AED) body impedance, the MAX30009 offers several calibration
options. An external precision resistor can be connected to the four-wire calibration port for the highest accuracy.
Internal trimmed resistors also provide high accuracy.
The PLL-based timing subsystem allows for a wide range of fine-tuned stimulus and sampling frequencies, and can be synchronized with other Analog Devices biosensors for simultaneous data collection.
The MAX30009 is available in a 2.03mm x 2.03mm, 25-bump Wafer-Level Package (WLP), operating over the -40°C to +85°C temperature range.
Applications
- Wearable Fitness, Wellness, and Medical Devices
- Multifrequency Body Composition Analyzers
- Non-Invasive Hemodynamic Monitors
- Automatic External Defibrillators
- Optimized Performance to Accurately Detect:
- Respiration Rate
- Galvanic Skin Response/Electrodermal Activity
- Bioimpedance Spectroscopy
- Body Composition and Fluid Analysis
- Impedance Cardiography and Plethysmography
