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MAX86140

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Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health

Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health

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Product Details

See parametric specs for Bio-Sensors

Key Features

Applications/Uses

See parametric specs for Bio-Sensors

Simplified Block Diagram

Technical Docs

Data Sheet Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health Feb 16, 2021
App Note Signal-to-Noise Ratio as a Quantitative Measure for Optical Biosensors
App Note Guidelines to Enhancing the Heart-Rate Monitoring Performance of Biosensing Wearables
App Note Guidelines for SpO2 Measurement Using the Maxim® MAX32664 Sensor Hub
App Note Guidelines for the Opto-Mechanical Integration of Heart-Rate Monitors in Wearable Wrist Devices
App Note Take a Weight Off Your Chest with a Wrist-Worn ECG Monitor
App Note Choose the Proper PMIC to Boost Your Optical Sensor SNR

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Key Features

  • Complete Single-Channel, Optical Data Acquisition System
  • Optimized Architecture for Transmissive and Reflective Heart Rate or SpO2 Monitoring
  • Low Dark Current Noise of < 50pA RMS (Sample to Sample Variance)
  • Lower Effective Dark Current Noise Achievable Through Multiple Sample Modes and On-Chip Averaging
  • High-Resolution, 19-bit Charge Integrating ADC
  • Three Low-Noise, 8-Bit LED Current DACs
  • Excellent Dynamic Range >89dB in White Card Loop-Back Test (Sample-to-Sample Variance)
  • Dynamic Range Extendable to >104dB for SpO2 and >110dB for HRM with Multiple Sample Modes and On-Chip Averaging
  • Excellent Ambient Range and Rejection Capability
    • > 100µA Ambient Photodetector Current
    • > 70dB Ambient Rejection at 120Hz
  • Ultra-Low-Power Operation for Body Wearable Devices
    • Low-Power Operation, Optical Readout Channel <10µA Typical at 25sps
    • Short Exposure Integration Period of 14.8µs, 29.4µs, 58.7µs, 117.3µs
    • Low Shutdown Current = 0.6µA (typ)
  • Rejection of Fast Ambient Transients
  • Miniature 2.048 x 1.848mm, 5 x 4 0.4mm Ball Pitch WLP
  • -40°C to +85°C Operating Temperature Range

Applications/Uses

  • Muscle Oxygen Saturation (SmO2 and StO2)
  • Optical Heart Rate
  • Optimized for Wrist, Finger, Ear, and Other Locations
  • Optimized Performance for High Quality PPG Signal to Detect
  • Oxygen Saturation
  • Wearable Devices for Fitness, Wellness, and Medical Applications

Description

The MAX86140/MAX86141 are ultra-low-power, com- pletely integrated, optical data acquisition systems. On the transmitter side, the MAX86140/MAX86141 have three programmable high-current LED drivers that can be configured to drive up to six LEDs using an external 3x2:1 mux. With two MAX86140/MAX86141 devices working in master-slave mode, the LED drivers can drive up to twelve LEDs using an external 3x2:1 mux. On the receiver side, MAX86140 consists of a single optical readout channel, while the MAX86141 has two optical readout channels that can operate simultaneously. The devices have low- noise signal conditioning analog front-end (AFE) including 19-bit ADC, an industry-lead ambient light cancellation (ALC) circuit, and a picket fence detect and replace func- tion. Due to the low power consumption, compact size, ease of use, and industry-lead ambient light rejection capability of MAX86140/MAX86141, the devices are ideal for a wide variety of optical-sensing applications, such as pulse oximetry and heart rate detection.

The MAX86140/MAX86141 operate on a 1.8V main supply voltage and a 3.1V to 5.5V LED driver supply voltage. Both devices support a standard SPI compatible interface and fully autonomous operation. Each device has a large 128-word built-in FIFO. The MAX86140/MAX86141 is available in compact wafer-level package (WLP) (2.048 x 1.848mm) with 0.4mm ball pitch.


Introducing the MAX-HEALTH-BAND Heart Rate and Activity Monitor

  
Wristband Health Monitoring Demo with MAX86141

Design Solution: REALLY Smart Wearables Customize Their Power Supply ›

Design Solution: Choose the Proper PMIC to Boost Your Optical Sensor SNR ›

Design Solution: Take a Weight Off Your Chest with a Wrist-Worn ECG Monitor ›

Design Solution: Designing for Wearable Health and Fitness? Think Inside the Box ›

Design Solution: Train Your Fitness Monitor to Deal with Any Lighting Conditions ›

Simplified Block Diagram

MAX86140, MAX86141: Detailed Block Diagram MAX86140, MAX86141: Detailed Block Diagram Zoom icon

Technical Docs

Data Sheet Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health Feb 16, 2021
App Note Signal-to-Noise Ratio as a Quantitative Measure for Optical Biosensors
App Note Guidelines to Enhancing the Heart-Rate Monitoring Performance of Biosensing Wearables
App Note Guidelines for SpO2 Measurement Using the Maxim® MAX32664 Sensor Hub
App Note Guidelines for the Opto-Mechanical Integration of Heart-Rate Monitors in Wearable Wrist Devices
App Note Take a Weight Off Your Chest with a Wrist-Worn ECG Monitor
App Note Choose the Proper PMIC to Boost Your Optical Sensor SNR

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .