Integrated Low Voltage I2C Ambient Light Sensor - LTR-308ALS-01
? I2C interface
? Ambient Light in ultra-small chipled package
? Very low power consumption with sleep mode capability
? Operating voltage ranges: 1.7V to 3.6V
? Operating temperature ranges: -40 to +85°C
? RoHS and Halogen free compliant
- Model Number: LTR-308ALS-01
- Data Sheet:
- Quantity:
- - +
Product Specification
LTR-308ALS-01 Ambient Light Sensor Description
The LTR-308ALS-01 is an integrated low voltage I2C ambient light sensor (ALS) in a single 2x2mm miniature chipled lead-free surface mount package.
The ALS provides a linear response over a wide dynamic range, which is well suited to applications under very low or bright ambient brightness.
The sensor has a programmable interrupt with hysteresis to response to events and that removes the need to poll the sensor for a reading which improves system efficiency. This CMOS design and factory-set one time trimming capability ensure minimal sensor-to-sensor variations for ease of manufacturability to the end customers.
LTR-308ALS-01 Ambient Light Sensor Application
Control brightness of display panel in mobile, computing, and consumer devices.
LTR-308ALS-01 Ambient Light Sensor Features
? I2C interface (Standard mode @100kHz or Fast mode @400kHz)
? Ambient Light in ultra-small chipled package
? Very low power consumption with sleep mode capability
? Operating voltage ranges: 1.7V to 3.6V
? Operating temperature ranges: -40 to +85°C
? Built-in temperature compensation circuit
? Programmable interrupt function for ALS with upper and lower thresholds
? RoHS and Halogen free compliant
? ALS Features
- 16 to 20 bits effective resolution
- Wide dynamic range (0.01 to 157K lux) with linear response
- Close to human eye spectral response
- Automatic rejection for 50Hz/60Hz lighting flicker
LTR-308ALS-01 Ambient Light Sensor Rating and Specification
Absolute Maximum Rating at Ta=25°C
|
Parameter |
Symbol |
Min. |
Max. |
Unit |
|
Supply Voltage |
VDD |
|
4.0 |
V |
|
Digital Voltage Range |
SCL, SDA, INT |
-0.5 |
4.0 |
V |
|
Storage Temperature |
Tstg |
-40 |
100 |
°C |
|
Electrostatic Discharge Protection (Human Body Model JESD22-A114) |
VHBM |
|
2000 | V |
Recommended Operating Conditions
|
Description |
Symbol |
Min. |
Typ. |
Max. |
Unit |
|
Supply Voltage |
VDD |
1.7 |
|
3.6 |
V |
|
Interface signal input high |
VI2Chigh |
1.5 |
|
VDD |
V |
|
Interface signal input low |
VI2Clow |
0 |
|
0.4 |
V |
|
Operating Temperature |
Tope |
-40 |
|
85 |
°C |
Electrical Specifications (VDD = 1.8V, Ta=25°C, unless otherwise noted)
|
Parameter |
Min. |
Typ. |
Max. |
Unit |
Condition |
|
Active Supply Current |
|
110 |
|
uA |
Max. duty cycle, Vdd=1.8V, Gain 3x |
|
andby Current |
|
1 |
|
uA |
Shutdown Mode |
|
Wakeup Time from Standby |
|
5 | 10 | ms |
From Standby to Active mode where measurement can start |
Characteristics Ambient Light
|
Parameter |
Min. |
Typ. |
Max. |
Unit |
Condition |
|
ALS Resolution |
16 |
|
20 |
Bit |
Programmable for 16, 17, 18, 19, 20 Bit |
|
ALS Lux accuracy |
-10 |
|
10 | % |
White LED, 5000K, Ta = 25°C |
|
Dark Level Count |
|
0 | 5 |
Count |
0 Lux, 18-bit resolution |
|
Integration time |
50 |
|
400 | ms |
With 50/60Hz Rejection |
|
50/60 Hz flicker noise error |
-5 |
|
+5 | % |
|
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