MAX86140
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MAX86140

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

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Part Details
Part Models 2
1ku List Price Starting From $3.99
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
Additional Details
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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 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 function. 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. 

Applications

  • 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 (SpO2)
  • Wearable Devices for Fitness, Wellness, and Medical Applications
Part Models 2
1ku List Price Starting From $3.99

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX86140ENP+
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Product Lifecycle

PCN

Sep 30, 2021

- 2189

ELECTRICAL DATASHEET

MAX86140ENP+

PRODUCTION

MAX86140ENP+T

PRODUCTION

Nov 18, 2020

- 2104

ELECTRICAL DATASHEET

MAX86140ENP+

PRODUCTION

MAX86140ENP+T

PRODUCTION

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Product Lifecycle

PCN

Sep 30, 2021

- 2189

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ELECTRICAL DATASHEET

MAX86140ENP+

PRODUCTION

MAX86140ENP+T

PRODUCTION

Nov 18, 2020

- 2104

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ELECTRICAL DATASHEET

MAX86140ENP+

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PRODUCTION

Evaluation Kit

Evaluation Kits 2

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MAX-HEALTH-BAND

Heart-Rate and Activity Monitor Evaluation and Development Platform

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MAX-HEALTH-BAND

Heart-Rate and Activity Monitor Evaluation and Development Platform

Heart-Rate and Activity Monitor Evaluation and Development Platform

Features and Benefits

  • Monitors and Streams Activity and Heart Rate to an Android® Mobile App
  • Collects Beat-to-Beat Physiological Data about the Heart
  • Provides Access to Raw Data from Sensors and Algorithm Output
  • Algorithm Output Data Includes Heart Rate, Heart-Rate Variability, Step Count, and Activity Classification
  • Eliminates up to 9 Months of Design Time for Building and Prototyping
  • Requires Less Than Half the Power and One-Third the Space of Other Solutions
  • Runs for Up to 7 Days on a Single Charge

Product Detail

The MAX-HEALTH-BAND wrist-worn heart-rate and activity monitor provides a simplified means to extract high-accuracy vital signs and raw data from health sensors for wearable designs. This unique evaluation and development platform uses the MAX86140 optimized optical pulse-oximeter/heart-rate sensor and the MAX20303 wearable power management solution, and showcases Maxim’s motion-compensated health sensor algorithms. The MAX-HEALTH-BAND streams algorithm output and raw data from the health sensors via Bluetooth® onto a smartphone app for customized algorithm development. The platform is also available for white-box license.

In addition to raw PPG and accelerometer data, the MAX-HEALTH-BAND monitors steps, activity classification, heart rate, and interbeat intervals for heart-rate variability. The MAX-HEALTH-BAND comes with a wrist-worn heart-rate and activity band, a USB charging cable, and instructions for downloading the Android-based application.

Applications

  • Fitness and Wellness Trackers
  • Health Monitoring Trackers
  • Reliable Hardware to Develop New Use Cases and Customer Algorithms

MAX86140EVSYS

Evaluation System for the MAX86140/MAX86141

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MAX86140EVSYS

Evaluation System for the MAX86140/MAX86141

Evaluation System for the MAX86140/MAX86141

Features and Benefits

  • Quick Evaluation of the MAX86140/MAX86141
  • Supports Optimization of Configurations
  • Facilitates Understanding MAX86140/MAX86141 Architecture and Solution Strategy
  • Real-time Monitoring
  • Data Logging Capabilities
  • On-Board Accelerometer
  • Bluetooth LE

Product Detail

The MAX86140/MAX86141 Evaluation System (EVSYS) allows for the quick evaluation of the MAX86140 and MAX86141 optical AFE for applications at various sites on the body, particularly the wrist. Both MAX86140 and MAX86141 supports standard SPI compatible interface. MAX86140 consists of a single optical readout channels, while MAX86141 has two optical readout channels that operate simultaneously. The EVSYS allows flexible configurations to optimize measurement signal quality at minimal power consumption. The EVSYS helps the user quickly learn about how to configure and use the MAX86140 and MAX86141.

The EVSYS consists of three boards. MAXSensor BLEEK# is the main data acquisition board while MAX86140OSBEK# and MAX86141OSBEK# are the sensor daughter boards for MAX86140 and MAX86141 respectively. The EVSYS can be powered using the USB-C supply or LiPo Battery.

The EVSYS comes with a MAX86140ENP+/MAX86141-ENP+ in a 24-bump wafer-level package (WLP).

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