MAX86140
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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Key Features
Applications/Uses
| ISUPPLY (µA) (typ) | 10 |
| Shutdown Mode Supply Current (µA) (typ) | 0.6 |
| VSUPPLY (V) (min) | 1.7 |
| VSUPPLY (V) (max) | 2 |
| Resolution (bits) (ADC) | 19 |
| SNR (dB) | 102 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | THIN WLP/20 |
| Budgetary Price (See Notes) | $3.20 @1k |
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Parameters
| ISUPPLY (µA) (typ) | 10 |
| Shutdown Mode Supply Current (µA) (typ) | 0.6 |
| VSUPPLY (V) (min) | 1.7 |
| VSUPPLY (V) (max) | 2 |
| Resolution (bits) (ADC) | 19 |
| SNR (dB) | 102 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | THIN WLP/20 |
| Budgetary Price (See Notes) | $3.20 @1k |
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.
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|  Wristband Health Monitoring Demo with MAX86141 |
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Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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