MAX30112
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MAX30112

Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health

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Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.25
Features
  • Reflective or Transmissive Heart Rate, Heart Rate Variability, or SpO2 Monitoring
  • Transmit Section
    • Two 8-bit LED Current DACs
    • Four Current Ranges 50mA, 100mA, 150mA, 200mA
    • Low Noise Current Sources for High Peak Transmit to Receive Dynamic Range
    • Low 160mV Dropout to Support Direct Drive From Rechargeable Li Battery
    • High Output Impedance and High Supply Rejection to Support Unregulated Supply or Direct Drive From Boost Switcher Supply
  • Receive Section
    • 19-bit Optical ADC Path to Support the Lowest Perfusions Situations
    • Low 25pA-RMS Input Referred Noise to Minimize LED Power Under Most Conditions
    • High Ambient Light Input Range of 200μA and to Support Extraction of HRM Signal in the Most Adverse Lighting Conditions
    • Built-in Front And Back End Ambient Light Cancellation, Improving Rejection and Eliminating System Complexity of Dealing with Ambient Light
    • Short Exposure Pulse Widths of 52μs, 104μs, 206μs, 417μs for Efficient Uses of LED Light
    • Multiple Sample Rate Options from 20sps to 3.2ksps
  • Ultra-Low-Power Operation for Mobile and Body-Wearable Device
    • Dynamic Power Down Modes to 100sps for Low-Power Consumption
    • Full AFE Power Consumption of Less Than 25μA (typ) at 25sps
    • Large 32 Sample FIFO to Support Batch Processing in the Microcontroller
    • Variety of System Monitors Mappable to Interrupts to Off-Load System Monitoring Functions From the Microcontroller
    • Low Shutdown Current = 1.4μA (typ)
  • I2C interface
  • Supports a Single 1.8V Supply with Separate 3.1V to 5.25V LED Supply
  • Miniature 2.8mm x 2.0mm, 6x4, 0.4mm Ball Pitch WLP Package
  • -40°C to +85°C Operating Temperature Range
Additional Details
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The MAX30112 is a complete optical pulse oximetry and heart rate detection integrated analog front-end. The MAX30112 has a high-resolution, optical readout signal-processing channel with built-in ambient light cancellation, as well as high-current LED driver DACs, to form a complete optical readout signal chain. With external LED(s) and photo diode(s), the MAX30112 offers the lowest power, highest performance heart rate detection solution for wrist applications.

The MAX30112 operates on a 1.8V main supply voltage, with a separate 3.1V to 5.25V LED driver power supply. The device supports a standard I2C compatible interface, as well as shutdown modes through the software with near-zero standby current, allowing the power rails to remain powered at all times.

Applications

  • Fitness Wearable Devices
  • In-Ear Wearable Devices
  • SpO2 Monitoring Devices
  • Wrist-Worn Wearable Devices
Part Models 2
1ku List Price Starting From $3.25

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX30112EWG+
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MAX30112EWG+T
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Evaluation Kit

Evaluation Kits 1

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MAX30110ACCEVKIT

Evaluation Kit for the MAX30110 and MAX30112

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MAX30110ACCEVKIT

Evaluation Kit for the MAX30110 and MAX30112

Evaluation Kit for the MAX30110 and MAX30112

Features and Benefits

  • Quick Evaluation of the MAX30110
  • Supports Optimization of Configurations
  • Facilitates Understanding MAX30110 Architecture and Solution Strategy
  • Real-Time Monitoring
  • Data-Logging Capabilities
  • USB-Powered
  • On-Board Accelerometer

Product Detail

The MAX30110 evaluation kit (EV kit) allows for the quick evaluation of the MAX30110 and MAX30112 optical AFE for applications at various sites on the body, particularly the wrist. MAX30110 supports standard SPI compatible interface, whereas MAX30112 supports I2C compatible interface. The EV kit allows flexible configurations to optimize measurement signal quality at minimal power consumption. The EV kit helps the user quickly learn how to configure and use the MAX30110 and MAX30112.

The EV kit consists of three boards. MAX30110_UC_ EVKIT is the main data acquisition board while MAX30110_SFH7050_EVKIT and MAX30110_OSB_EVKIT are the sensor daughter boards in which the MAX30110 devices are placed in different optical configurations. The EV kit is powered using the USB supply to generate +1.8V for the AFE and accelerometer and +4.5V for the LEDs.

The EV kit comes with a MAX30110EWG+ in a 24-bump wafer-level package (WLP).

Applications

  • Fitness Wearable Devices
  • In-Ear Wearable Devices
  • SpO2 Monitoring Devices
  • Wrist-Worn Wearable Devices
Tools & Simulations

Tools & Simulations 1

Reference Designs

Reference Designs 1

MAXREFDES1207 Block Diagram

Heart-Rate Monitor Wrist Band Using the MAX77651B

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MAXREFDES1207

Heart-Rate Monitor Wrist Band Using the MAX77651B

Heart-Rate Monitor Wrist Band Using the MAX77651B

Features and Benefits

Description

The MAXREFDES1207 is a reference design for wearable application based on a total Analog Devices solution which includes the MAX32660, MAX30112, MAX77651B, and MAX40005. This solution demonstrates how a small size, low cost, low power, high accuracy heart-rate (HR) monitor can be easily implemented. This design can monitor heart rate using two green LEDs.

The MAX30112 is an optimized pulse-oximeter and heartrate AFE for wearable health. It has a high-resolution, optical readout signal-processing channel with built-in ambient light cancellation as well as high-current LED driver DACs to form a complete optical readout signal chain. With external LED(s) and photodiode(s), the MAX30112 offers the lowest power, highest performance heart-rate detection solution for wrist applications. The MAX77651B provides highly-integrated battery charging and power supply solutions for low-power wearable applications where size and efficiency are critical. The device features a SIMO buckboost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A highly configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA). The MAX32660 is an ultra-low-power, cost-effective, highly- integrated microcontroller unit (MCU) designed for battery- powered devices and wireless sensors. It combines a flexible and versatile power management unit with the powerful Arm® Cortex®-M4 with floating point unit (FPU). The MAX40005 is a tiny, single comparator which is ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints. The design also contains an FTDI FT234 USB-to-serial UART interface.

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Design & Integration Tools

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