Analog Devices Inc. ADPD4100 & ADPD4101 Multimodal Sensor Front Ends
Analog Devices Inc. ADPD4100 and ADPD4101 Multimodal Sensor Front Ends stimulate up to eight LEDs and measure the return signal on up to eight separate current inputs. These devices offer 12 programmable time slots for synchronized sensor measurements. The ADPD4100 and ADPD4101 sensor front ends feature dual-channel processing with simultaneous sampling, flexible input multiplexing, and on-chip digital filtering. The ADPD4100 supports SPI communication and the ADPD4101 supports I2C communication. Typical applications include wearable health and fitness monitors, industrial monitoring, and home patient monitoring.
Features
- Multimodal analog front end
- 8 input channels with multiple operation modes for various sensor measurements
- Dual-channel processing with simultaneous sampling
- 12 programmable time slots for synchronized sensor measurements
- Flexible input multiplexing to support differential and single-ended sensor measurements
- 8 LED drivers, 4 of which can be driven simultaneously
- Flexible sampling rate from 0.004Hz to 9kHz using internal oscillators
- On-chip digital filtering
- SNR of transmit and receive signal chain: 100dB
- AC ambient light rejection: 60dB up to 1kHz
- 400mA total LED peak drive current
- Total system power dissipation
- 30µW (combined LED and AFE power)
- Continuous PPG measurement at 75dB SNR, 25Hz ODR, 100nA/mA CTR
- Interface
- ADPD4100: SPI
- ADPD4101: I2C
- 512-byte FIFO size
- Package options
- WLCSP-33
- WLCSP-35
Applications
- Wearable health and fitness monitors:
- Heart Rate Monitors (HRMs)
- Heart Rate Variability (HRV)
- Stress
- Blood pressure estimation
- Spot Oxygen saturation (SpO2)
- Hydration
- Body composition
- Industrial monitoring:
- CO, CO2, smoke, and aerosol detection
- Home patient monitoring
- Different sensor measurements:
- Photoplethysmography (PPG)
- Electrocardiography (ECG)
- Electrodermal activity (EDA)
- Impedance
- Capacitance
- Temperature
Specifications
- 0.004Hz to 9kHz flexible sampling rate using internal oscillators
- 100dB SNR of transmit and receive signal chain
- 60dB up to 1kHz AC ambient light rejection
- 400mA total LED peak drive current
- 512-byte FIFO size
- 30µW total system power dissipation (combined LED and AFE power)
Additional Resources
Vital Signs Monitoring Is Easier Than Ever Before
The health information generated by wearable devices can play an essential role in health and disease management. With the groundbreaking analog front end (AFE) from Analog Devices, the ADPD4100/ADPD4101 demonstrates it’s never been simpler.
How to Design A Better Pulse Oximeter
This article covers the fundamentals of SpO2 measurement and demonstrates how a new generation of optical analog front ends (AFEs) can help create a better oximeter.
Liquid Analysis from Environmental Waters to Process Control
Monitoring the environment in real-time is critical to improving global sustainability. Having the ability to quickly analyze a sample and identify a problem is key to a fast resolution with minimal impact on the ecosystem.
Vital Sign Technologies: Condition-Based Monitoring of the Human Body
In the vast portfolio of Analog Devices’ products dedicated to signal processing, designers of vital sign monitoring systems will find a whole range of solutions to the design challenges they face.
Development Tools
Analog Devices Inc. EVAL-ADPD4100Z-PPG Evaluation Board
Provides a simple means of evaluating the ADPD4100/ADPD4101 photometric front ends.
Analog Devices Inc. EVAL-CN0503-ARDZ Liquid Measurement Platform
Optical-based liquid measurement reference design based on the ADPD4101 Multimodal Sensor Front End.
Analog Devices Inc. EVAL-ADPD410x-ARDZ Arduino Breakout Boards
The EVAL-ADPD4100-ARDZ/EVAL-ADPD4101-ARDZ, designed for developing ADPD4100 & ADPD4101 applications.
Functional Block Diagram
Performance Graph
