ADPD144RI-ACEZ-RL7

ADPD144RI is a highly integrated, photometric front end optimized for photoplethysmography (PPG) detection of blood oxygenation (SpO2) by synchronous detection in red and infrared wavelengths. Synchronous measurement allows rejection of both dc and ac ambient light interference with extremely low power consumption. The module combines highly efficient, light emitting diode (LED) emitters and a sensitive 4-channel, deep diffusion photodiode (PD1 to PD4) with a custom application specific integrated circuit (ASIC) in a compact package that provides optical isolation between the integrated LED emitters and the detection photodiodes to improve through tissue, signal-to noise ratio (SNR). The digital control block provides AFE and LED timing, signal processing, and communication. Data output and functional configuration occur over a 1.8V I²C interface. It is used in application such as optical heart rate monitoring, reflective SpO2 measurement etc.

• Fully integrated AFE, ADC, LED drivers, and timing core
• Custom optical package for use under a glass window
• Programmable 2-channel, 8.5mA to 370mA LED drivers
• Provision to use external LED emitters, low power, supply voltage is 1.8V typ
• Specifically designed for ultralow direct optical reflections, independent AFE settings per channel
• Burst accumulator enabling 20bits per sample period
• Sample to sample accumulator enabling upto 27bits per data read
• 16bit or 32bit register or FIFO readout per channel
• Peak supply current is 9.3mA typ at (4-channel operation)
• Operating temperature is -40°C to +85°C, package style is 12-lead LGA-CAV

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party