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

Please check latest availability status for a specific part variant.


The MAX86140/MAX86141 are ultra-low-power, completely 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. With two MAX86140/MAX86141 devices working in master-slave mode, the LED drivers can drive up to twelve LEDs. On the receiver side, MAX86140 consists of a single optical readout channels, 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 algorithm. Due to the low power consumption, compact size, easy/flexible-to-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 3.1~5.5V 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: 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 ›

MAX86140, MAX86141: Simplified Block Diagram MAX86140, MAX86141: Simplified Block Diagram Enlarge+

Key Features

  • Complete Single-Channel, Optical Data Acquisition System
  • Built-in Algorithm Further Enhances Rejection of Fast Ambient Transients
  • 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 >90dB 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 = 20μW Typical
  • Built-in Algorithm Further Enhances 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


  • - Muscle Oxygen Saturation (SmO2 and StO2)
  • - Optical Heart Rate
  • - Oxygen Saturation
  • Optimized for Wrist, Finger, Ear, and Other Locations
  • Optimized Performance for High Quality PPG Signal to Detect
  • Wearable Devices for Fitness, Wellness, and Medical Applications
Part NumberApplicationsISUPPLY
Shutdown Mode Supply Current
Oper. Temp.
typtypminmaxADCSee Notes
At-home Monitoring
Wearable Devices
Wearable Patient Monitors
100.61.7219-40 to +85
$3.05 @1k
$3.35 @1k
See All Bio-Sensors (13)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX86140EVSYS: Evaluation System for the MAX86140/MAX86141
MAX-HEALTH-BAND: Heart-Rate and Activity Monitor Evaluation and Development Platform
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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