The ADPD174GGI is a complete photometric system designed to measure optical signals from ambient light and from synchronous reflected LED pulses. Synchronous measurement offers best-in-class rejection of ambient light interference, both dc and ac. The module integrates a highly efficient photometric front end, three LEDs, and a photodiode (PD). All of these items are housed in a custom package that prevents light from going directly from the LED to the photodiode without first entering the subject.
The front end of the ASIC consists of a control block, a 14-bit analog-to-digital converter (ADC) with a 20-bit burst accumulator, and three flexible, independently configurable LED drivers. The control circuitry includes flexible LED signaling and synchronous detection. The analog front end (AFE) features best-in-class rejection of signal offset and corruption due to modulated interference commonly caused by ambient light. The data output and functional configuration occur over a 1.8 V I2C interface.
Features and Benefits2 green LEDs located on either side of the photodiode, 1 infrared LED, and 1 photodiode | Optical |
| Document | note |
| ADPD174GGI: Integrated Optical Module with Ambient Light Rejection and Three LEDs Data Sheet (Rev. Sp0) | PDF 67.89 K |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| ADPD174GGI-ACEZR7 Contact ADI | LGA_CAV NO LEAD CAVITY | REEL 1000 | -40 to 85C | 0 | 5.67 | Y |
| ADPD174GGI-ACEZRL Contact ADI | LGA_CAV NO LEAD CAVITY | REEL 4000 | -40 to 85C | 0 | 5.67 | Y |
