Analog Devices Inc. ADPD105BCPZRL

Description
The ADPD105/ADPD106/ADPD107 are highly efficient photometric front ends with integrated 14-bit ADCs and 20-bit burst accumulators. They work with flexible LED drivers to stimulate an LED and measure the corresponding optical return signal. The data output and functional configuration occur over a 1.8 V I2C interface on the ADPD105 or SPI on the ADPD106 and ADPD107. The control circuitry includes flexible LED signaling and synchronous detection. The AFE features best-in-class rejection of signal offset and corruption due to 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 370 mA LED drivers
Flexible, multiple, short LED pulses per optical sample
20-bit burst accumulator enabling 20 bits per sample period
On-board sample to sample accumulator, enabling up to 27 bits per data read
Low power operation
SPI, I2C interface, and 1.8 V analog/digital core
Flexible sampling frequency ranging from 0.122 Hz to 3820 Hz
FIFO data operation

Applications
Wearable health and fitness monitors
Clinical measurements, for example, SpO2
Industrial monitoring
Background light measurements