General Description
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 leadoff 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-todigital 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 500kHz 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
-40ºC to +85ºC 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

Benefits and Features
BIOZ
● Complete High-Performance BioZ AFE
● Simultaneous I and Q Measurement Capability
● Four-Electrode (Tetrapolar) and Two-Electrode
(Bipolar) Configurations
● Ultra-Low Power Operation
• 250 μW at 1.8V AVDD
● High-Resolution, 20-Bit Sigma Delta Analog-to-Digital
Converters (ADCs)
● Wide Range of Sample Rates from 16sps to 4ksps
● Flexible and Programmable Input/Output MUX
● Low-Noise, High-Resolution Receive Channel
• 17 Bits Effective Resolution with 1.1µVP-P Noise
● High Input Impedance > 1GΩ for Extremely Low
Common to Differential-Mode Conversion
● Programmable Sine-Wave Stimulus
● Low Frequency, Low Current Options for Galvanic
Skin Response (GSR)/Electrodermal Activity (EDA)
Starting from 16Hz and 16nARMS
● Wide Range of Bioelectrical Impedance Analysis/
Spectroscopy (BIA/BIS) Frequencies from 1kHz to
500kHz
● High Currents at High Frequencies for Impedance
Cardiography (ICG) Applications (e.g.,1.28mARMS at
100kHz) with Lockout for Lower Frequencies for
Conformance with 60601-1
● High Input AC Dynamic Range of >1000mVP-P
● 4-Pin In-Situ Calibration Port (4-Wire Precision
Resistor) Enables High-Quality Absolute Impedance
Measurements
● DC Leads-Off Detect Capability
● Ultra-Low Power Lead-On Detection with Interrupt for
System Wake-Up.
• Lead-On Detect Current: 0.7µA (typ)

SYSTEM
● Shutdown Current of 0.6µA (Typ)
● 256 Word FIFO
● Flexible PLL-Based Timing Subsystem with Internal or
External Clock Source
● PLL can be Synchronized with Adjacent Biosensor
AFEs (such as the MAX86176 Photoplethsymography
(PPG)/Electrocardiography (ECG) AFE)
● Configurable Interrupts Reduce µC Wake-Up Time
and Save Power
● High-Speed Serial Peripheral Interface (SPI) and I2C
Digital Interface