Analog Devices Inc. ADPD1080 & ADPD1081 Photometric AFEs
Analog Devices Inc. ADPD1080 and ADPD1081 Photometric AFEs feature an integrated 14-bit analog-to-digital (ADC) and a 20-bit burst accumulator which works with flexible LED drivers. The AFEs are designed to stimulate a LED and measure the optical return signal. These AFEs provide a flexible 0.122Hz to 2700Hz sampling frequency range. The 20-bit burst accumulator delivers 20 bits per sample period.
The onboard sample-to-sample accumulator enables up to 27 bits per data read. The data output and functional configuration occur over a 1.8V I²C interface on the ADPD105 and ADPD108 or SPI on the ADPD106 and ADPD107. The control circuitry includes flexible LED signaling and synchronous detection. Analog Devices ADPD1080 and ADPD1081 AFEs offer exceptional rejection of signal offset and corruption thanks to the modulated interference commonly caused by ambient light.
Features
- Multifunction photometric front end
- Fully integrated AFE, ADC, LED drivers, and timing core
- Enables best-in-class ambient light rejection capability without the need for photodiode optical filters
- Three 370mA LED drivers
- Flexible, multiple, short LED pulses per optical sample
- 20-bit burst accumulator enabling 20 bits per sample period
- Onboard sample to sample accumulator, enabling up to 27 bits per data read
- Low power operation
- SPI, I²C interface, and 1.8V analog/digital core
- Flexible sampling frequency ranging from 0.122Hz to 2700Hz
- FIFO data operation
Applications
- Wearable health and fitness monitors
- Clinical measurements, for example, SpO2
- Industrial monitoring
- Background light measurements
Evaluation Tools
Analog Devices Inc. EVAL-ADPD105Z-GEN Evaluation Board
Evaluates the ADPD105 in different applications from vital signs monitoring to industrial sensing.
Analog Devices Inc. EVAL-ADPD1080Z-PRX Eval Kit for the ADPD1080 AFE
Provides a way to connect with the hardware, collect data, and evaluate the ADPD1080.
Analog Devices Inc. EVAL-ADPD1081Z-PPG Eval Board for ADPD1081 AFE
Provides a simple means of evaluating the ADPD1080/ADPD1081 photometric front end.
Analog Devices Inc. EVAL-CN0409-ARDZ Arduino Shield for Turbidity
Uses the ADPD105, infrared emitters, & photodiodes to create a water turbidity measurement system.
Mikroe MIKROE-5742 IR Gesture 3 Click
Compact add-on board with contactless gesture recognition.
Related Products
Analog Devices Inc. ADPD188BI Integrated Optical Module
Complete photometric system for smoke detection using optical dual wavelength technology.
Additional Resources
Reducing the False Alarm Rate - How Smoke Alarms Can Pass the Hamburger Nuisance Alarm Test
The hamburger nuisance test is very hard to pass because the smoke particles from a burnt hamburger patty do not differ that much from normal smoke. Discover why the integrated optical module for smoke detection is a turning point.
Optical Integration Without Compromises
Shorten the overall design cycle for measuring heart rate, heart rate variability, and oxygen saturation by using a fully integrated optical module. Optics and electronics, all in a tiny package.
Condition-Based Monitoring of the Human Body
With advances in technology, vital sign monitoring will become increasingly common in various industries and throughout daily lives. Whether used for treatment or prevention, such health-related solutions call for reliable and robust technology.
How Reliable and Affordable Presence Detection Can Change the Space Management
With the growing role of presence detection, what are the advantages of active infrared sensors vs. passive infrared sensors?
How to Design A Better Pulse Oximeter
This article covers the fundamentals of SpO2 measurement and demonstrates how optical analog front ends (AFEs) can help create a better oximeter.
Block Diagram
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