The TMD2635 is a miniature proximity sensor module featuring advanced proximity measurement in a compact 1.0mm x 2.0mm x 0.5mm optical land grid array package. It integrates a 940nm IR VCSEL and is factory calibrated for IR proximity response, enabling object detection through photodiode measurement of reflected IR energy. Detect/release events can be interrupt-driven, crossing user-defined thresholds. The module offers wide offset adjustment for IR energy reflection compensation and automatic ambient light subtraction for improved proximity results. It is optimized for small wearable devices, offering reduced power consumption with a 1.8V supply and 1.8V IC bus, including a low-power sleep mode (0.7A) with fast wakeup.
| Parameter | Min | Typ | Max | Units | Conditions | Notes |
| Module Dimensions | 1.0 x 2.0 x 0.5 | mm | ||||
| Supply Voltage (VDD) | 1.7 | 1.8 | 2.0 | V | Sensor supply voltage | |
| IR Emitter Voltage (VDD3) | 2.9 | 3.3 | 3.6 | V | ||
| Operating Ambient Temperature | -30 | 85 | C | |||
| Sleep Mode Current | 0.7 | A | PON = 0, IC bus idle | |||
| Active State Current | 197 | 340 | 482 | A | PON=1, actively integrating | Excludes IR VCSEL current |
| IC Clock Frequency | MHz | Standard and Fast modes supported | ||||
| IC Chip Address | 0x39 | 7-bit addressing | ||||
| Wakeup Time (from sleep) | 100 | s | PON=1, PEN=1 | |||
| Near Photodiode Response (Absolute) | 292 | 389 | 486 | counts | PGAIN=1x, PLDRIVE=7mA, PPULSE=5, PPULSE_LEN=12s, APC disabled, TEST9=0x07, BINSRCH_TARGET=31, 18% reflective surface, 10mm distance | Characterized result |
| Far Photodiode Response (Absolute) | 250 | 333 | 416 | counts | PGAIN=1x, PLDRIVE=7mA, PPULSE=5, PPULSE_LEN=12s, APC disabled, TEST9=0x07, BINSRCH_TARGET=31, 18% reflective surface, 10mm distance | Characterized result |