Analog Devices MAX30009 Product Info

• 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 1.1ΩV_P-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 806kHz
• High Currents at High Frequencies for Impedance Cardiography (ICG) Applications (e.g.,1.28mA_RMS at 100kHz) with Lockout for Lower Frequencies for Conformance with 60601-1
• High Input AC Dynamic Range of >1000mV_P-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 Photopleth

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 500kHz and a wide magnitude range of of 16nA_RMS to 1.28mA_RMS. 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.

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