LITEON LTR91400 low voltage I2C ambient light gesture and proximity sensor for display panel control
LITE-ON LTR-91400 Optical Sensor
Product Overview
The LITE-ON LTR-91400 is an integrated, low-voltage I2C ambient light sensor (ALS), gesture sensor (GS), and proximity sensor (PS) housed in a single miniature ChipLED surface mount package. This device converts light intensity into a digital output signal with direct I2C interface capabilities. The gesture sensor detects object motion direction (East, West, North, South) based on reflected IR light. The ambient light sensor offers a linear response across a wide dynamic range, suitable for high brightness conditions. The built-in proximity sensor, with its configurable detection distance, enhances system efficiency by supporting an interrupt feature, eliminating the need for constant polling. Its CMOS design and factory-set trimming minimize sensor-to-sensor variations. Applications include display panel brightness control and object/motion detection in mobile, computing, and consumer devices.
Product Attributes
- Brand: LITE-ON
- Product Type: Optical Sensor
- Part Number: LTR-91400
- Certifications: RoHS and Halogen free compliant
- Package Type: Tape and Reel, 8-pins Chip-led package
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Interface | I2C | Standard mode @100kHz or Fast mode @400kHz |
| Sensing Capabilities | Gesture, Ambient Light, Proximity | Integrated in one ChipLED package |
| Power Consumption | Very low | With sleep mode capability |
| Operating Voltage | 2.4V to 3.6V | VDD |
| Operating Temperature | -30 to +70 C | Tope |
| Interrupt Function | Programmable | For ALS, PS, and GS |
| Temperature Compensation | Built-in | Circuit |
| Gesture Sensor (GS) Features | 4 photodiodes (East, West, North, South), 32 dataset storage FIFO, 8-bit effective resolution, Programmable LED drive settings, Programmable crosstalk correction | |
| Ambient Light Sensor (ALS) Features | 16-bits effective resolution, Wide dynamic range (1:15,000,000) with linear response, Close to human eye spectral response, Automatic rejection for 50Hz/60Hz lighting flicker | |
| Proximity Sensor (PS) Features | Built-in LED driver and detector, 11-bit effective resolution, Programmable LED drive settings, Programmable crosstalk correction, High Ambient Light Suppression | |
| Ordering Information | LTR-91400 | Tape and Reel, 8000 pieces per reel |
| Absolute Maximum Supply Voltage | 3.8 V | VDD |
| Recommended Operating Supply Voltage | 2.4 V (Min) - 3.6 V (Max) | VDD |
| Recommended Operating LED Supply Voltage | 2.5 V (Min) - 4.35 V (Max) | VLED |
| Active Supply Current (ALS active) | 210 uA (Typ) | ALS integration time = 100ms, ALS measurement repeat rate = 400ms |
| Active Supply Current (PS active) | 100 uA (Typ) | 25% Duty Cycle, 8us Pulse Width, 100mA, 8 Pulses, PS measurement repeat rate = 100ms (Not including VLED current) |
| Active Supply Current (GS+PS active) | 450 uA (Typ) | 25% Duty Cycle, 8us Pulse Width, 100mA, 8 Pulses, PS measurement repeat rate = 100ms, Full 32 dataset, GS wait time = 0ms |
| Standby Current | 5 uA (Typ) | Standby / Sleep Mode |
| Initial Startup Time | 100 ms (Min) | After power up before sending I2C commands |
| Wakeup Time from Standby | 10 ms (Max) | Time after turning device from stand-by to active |
| ALS Dark Count | 0 - 10 count | Lux = 0, Tope=25C |
| ALS Lux Accuracy | -20% to +20% | |
| PS Detection Distance | 50 mm | Under dark tinted window, 25% Duty Cycle, 8us Pulse Width, 100mA, 2 Pulses, 18% Gray Card |
| PS LED Peak Wavelength | 940 nm | |
| GS Detection Distance | 10 cm | With recommended optical design |
| GS LED Peak Wavelength | 940 nm | |
| I2C Slave Address | 0x23H |
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