Overview
The ADPD144RI-ACEZ-RL7 is a highly integrated optical module designed by Analog Devices Inc. for reflective photoplethysmography (PPG) measurements. This module combines a photometric front end with red and infrared LED emitters, a four-segment photodiode, and a fully integrated analog front end (AFE), analog-to-digital converter (ADC), LED drivers, and timing core. It is specifically optimized for use under a glass window, making it suitable for various biomedical applications. The module operates with a supply voltage of 1.7 to 1.9 V and has an operating temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Manufacturer Part No. | ADPD144RI-ACEZ-RL7 |
| Package Type | LGA-12 |
| Supply Voltage | 1.7 to 1.9 V |
| Operating Temperature | -40°C to +85°C |
| ADC Resolution | 14-bit |
| LED Drivers | Programmable 2-channel, 8.5 mA to 370 mA |
| LED Wavelengths | 660 nm (red), 880 nm (IR) |
| Interface | I2C |
| Peak Supply Current | 9.3 mA (typ) at 4-channel operation |
Key Features
- Fully integrated AFE, ADC, LED drivers, and timing core.
- Custom optical package for use under a glass window.
- Programmable 2-channel LED drivers with current range from 8.5 mA to 370 mA.
- Provision to use external LED emitters.
- Low power operation with a supply voltage of 1.8 V (typ).
- Specifically designed for ultralow direct optical reflections.
- Independent AFE settings per channel.
- Burst accumulator enabling 20 bits per sample period and sample to sample accumulator enabling up to 27 bits per data read.
- 16-bit or 32-bit register or FIFO readout per channel.
- I2C data and control interface.
Applications
- Optical heart rate monitoring.
- Reflective SpO2 measurement.
- Biomedical applications requiring PPG detection under a glass window.
Q & A
- What is the ADPD144RI-ACEZ-RL7 used for?
The ADPD144RI-ACEZ-RL7 is used for reflective photoplethysmography (PPG) measurements, particularly in applications such as optical heart rate monitoring and reflective SpO2 measurement.
- What is the operating voltage range of the ADPD144RI-ACEZ-RL7?
The operating voltage range is 1.7 to 1.9 V.
- What is the operating temperature range of the ADPD144RI-ACEZ-RL7?
The operating temperature range is -40°C to +85°C.
- What types of LED emitters are integrated into the ADPD144RI-ACEZ-RL7?
The module includes red (660 nm) and infrared (880 nm) LED emitters.
- What is the resolution of the ADC in the ADPD144RI-ACEZ-RL7?
The ADC resolution is 14-bit.
- How does the ADPD144RI-ACEZ-RL7 handle ambient light rejection?
The module is specifically designed for ultralow direct optical reflections and includes ambient light rejection capabilities.
- What interface does the ADPD144RI-ACEZ-RL7 use for data and control?
The module uses an I2C interface for data and control.
- Can the ADPD144RI-ACEZ-RL7 use external LED emitters?
Yes, the module provides the provision to use external LED emitters.
- What is the peak supply current of the ADPD144RI-ACEZ-RL7 during 4-channel operation?
The peak supply current is 9.3 mA (typ) during 4-channel operation.
- How does the burst accumulator in the ADPD144RI-ACEZ-RL7 work?
The burst accumulator sums the pulse energies into a 20-bit value, and the sample to sample accumulator can enable up to 27 bits per data read.
