Product Overview
The LTR-303ALS-01 is a low-voltage I2C digital light sensor (ALS) housed in a miniature, lead-free surface-mount package. It converts light intensity into a digital output signal with a direct I2C interface. This sensor offers a linear response across a wide dynamic range (0.01 lux to 64k lux) and is suitable for applications with high ambient brightness. It features six configurable gain settings (1X, 2X, 4X, 8X, 48X, and 96X) and an interrupt function to improve system efficiency by eliminating the need for constant polling. Its CMOS design and factory-set trimming minimize sensor-to-sensor variations. Applications include back-lighting and touch panel control in mobile/portable devices.
Product Attributes
- Brand: LITE-ON
- Origin: Taiwan, R.O.C.
- Certifications: RoHS and Halogen free compliant
Technical Specifications
| Parameter | Min. | Typ. | Max. | Unit | Condition |
| Supply Voltage | 2.4 | 3.6 | V | ||
| Interface Bus Power Supply Voltage | 1.7 | 3.6 | V | ||
| I2C Bus Input Pin High Voltage (SCL, SDA) | 1.2 | V | |||
| I2C Bus Input Pin Low Voltage (SCL, SDA) | 0.6 | V | |||
| Operating Temperature | -30 | 70 | C | ||
| Active Supply Current | 220 | uA | Active Mode, Ta = 25C, VDD=3.6V, Integration Time: 100ms, Measurement rate: 200ms | ||
| Standby Current | 5 | uA | Standby / Sleep Mode | ||
| Initial Startup Time | 100 | ms | (Note 1) | ||
| Wakeup Time from Standby | 10 | ms | (Note 1) | ||
| Full Scale ADC Count | 65535 | count | |||
| Dark ADC Count (Ch0, Lux = 0) | 0 | 6 | count | ||
| Dark ADC Count (Ch1, Lux = 0) | 0 | 6 | count | ||
| ADC Count (Gain=96) @200Lux (Ch0) | 3250 | 6100 | count | White LED 200 Lux, Integration Time: 50ms, Measurement Time: 100ms | |
| ADC Count (Gain=96) @200Lux (Ch1) | 1050 | 1950 | count | White LED 200 Lux, Integration Time: 50ms, Measurement Time: 100ms | |
| Ratio Ch1/(Ch0 + Ch1) | 0.15 | 0.35 | |||
| SCL Clock Frequency | 1 | 400 | kHz | I2C Fast Mode | |
| Bus Free Time (tBUF) | 1.3 | us | Between STOP and START condition | ||
| Hold Time (tSTA) | 0.6 | us | Repeated START condition | ||
| LOW Period of SCL Clock (tLOW) | 1.3 | us | |||
| HIGH Period of SCL Clock (tHIGH) | 0.6 | us | |||
| Set-up Time for Repeated START (tSU:STA) | 0.6 | us | |||
| Set-up Time for STOP Condition (tSU:STO) | 0.6 | us | |||
| Rise Time (tRT) | 30 | 300 | ns | SDA and SCL signals | |
| Fall Time (tFT) | 30 | 300 | ns | SDA and SCL signals | |
| Data Hold Time (tHD:DAT) | 0.3 | 0.9 | us | ||
| Data Set-up Time (tSU:DAT) | 100 | ns | |||
| Pulse Width of Spikes (tSP) | 0 | 50 | ns | To be suppressed by input filter |
2410121607_LITEON-LTR-303ALS-01_C364577.pdf
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