Integrated optical photometric sensor module measures ambient-light and synchronous reflected LED pulse signals. The module integrates a photometric front end, two green LEDs, two photodiodes, a 14-bit ADC, a 20-bit burst accumulator, and three configurable LED drivers. Digital configuration and data output use a 1.8 V I2C interface or an SPI port. The device operates over a -40°C to +85°C temperature range in a 3.8 mm × 5.0 mm, 24-terminal LGA cavity package.
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| Optical module dimensions | 3.8 x 5.0 x 0.9mm |
| Integrated LEDs | 2 green LEDs |
| LED dominant wavelength | 525nm |
| Photodiodes | 2 with IR cut filter |
| External sensor inputs | 2 |
| LED drivers | 3 independently configurable |
| LED peak current setting | 12 to 370mA |
| ADC resolution | 14 single pulsebit |
| Burst accumulator resolution | 20 per sample periodbit |
| Data read resolution | Up to 27bit |
| VDD supply voltage | 1.7 to 1.9V |
| VLED1 supply voltage | 4.0 to 5.0V |
| Operating temperature | -40 to +85°C |
| I2C clock frequency | 0.4 maxMb/s |
| SPI clock frequency | 10 maxMHz |
| Standby current | 0.3 typµA |
| Peak VDD supply current | 4.5 typmA |
| Package terminals | 24 |
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