Integrated Low Voltage I2C Ambient Light and Ultraviolet Light Sensor - LTR-390UV-01
? I2C interface capable of Standard mode @100kHz or Fast mode @400kHz communication; 1.8V logic compatible
? Ambient Light / Ultraviolet light (UVS) Technology in one ultra-small 2x2mm 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
? RoHS and Halogen free compliant
- Model Number: LTR-390UV-01
- Data Sheet:
- Quantity:
- - +
Product Specification
LTR-390UV-01 Ambient Light Sensor and Ultraviolet Light Sensor Description
The LTR-390UV-01 is an integrated low voltage I2C ambient light sensor (ALS) and ultraviolet light sensor (UVS) in a single miniature 2x2mm chipled lead-free surface mount package.This sensor converts light intensity to a digital output signal capable of direct I2C interface. It provides a linear ALS response over a wide dynamic range, and is well suited to applications under high 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-390UV-01 Ambient Light Sensor and Ultraviolet Light Sensor Application
? Identifying the UV index in ambient light helps people to effectively protect themselves from sunburns, cancer or eye damage.
? To control brightness and color of the display panel in mobile, computing, and consumer devices.
LTR-390UV-01 Ambient Light Sensor and Ultraviolet Light Sensor Features
? I2C interface capable of Standard mode @100kHz or Fast mode @400kHz communication; 1.8V logic compatible
? Ambient Light / Ultraviolet light (UVS) Technology in one ultra-small 2x2mm 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 , UVS with upper and lower thresholds
? RoHS and Halogen free compliant
? UVS/ALS Features
- 13 to 20bits effective resolution
- Wide dynamic range of 1:18,000,000 with linear response
- Close to human eye spectral response
- Automatic rejection for 50Hz/60Hz lighting flicker
LTR-390UV-01 Ambient Light Sensor and Ultraviolet 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 |
|
-45 to 95 |
°C |
|
Max. Input Current |
SCL, SDA, INT |
-100 |
100 |
mA |
|
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 = 2.8V, Ta=25°C, unless otherwise noted)
|
Parameter |
Min. |
Typ. |
Max. |
Unit |
Condition |
|
ALS Active Mode Current |
|
110 |
|
uA |
Max. duty cycle, Vdd=2.8V, Gain 3x |
|
UVS Active Mode Current |
|
100 |
|
uA |
Max. duty cycle, Vdd=2.8V |
|
Standby Current |
|
1 |
|
uA |
Standby / Sleep 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 Output Resolution |
13 | 18 | 20 |
Bit |
Programmable for 13,16,17,18,19, 20 bit |
|
Dark Level Count |
|
0 | 5 |
count |
0 Lux, Tope=25°C, 18-bit range |
|
Calibrated Lux Error In Gain Range 3 |
-10 |
|
10 | % |
White LED, 5000K,Tope=+25°C |
|
ALS Accuracy |
-25 |
|
25 | % |
Across different light sources |
|
50/60 Hz flicker noise error |
-5 |
|
5 | % |
|
Characteristics UVS Sensor
|
Parameter |
Min. |
Typ. |
Max. |
Unit |
Condition |
|
UVS Output Resolution |
13 | 18 | 20 |
Bit |
Programmable for 13,16,17,18,19,20 bit |
|
UV Count |
|
160 |
|
count |
UV LED 310nm, Tope=25°C, 18-bit Gain range=18, Irradiance =70uW/cm2 |
|
UV Sensitivity |
|
2300 |
|
Counts/UVI |
Gain range = 18, 20-bit |
|
UVI accuracy |
-20
-1
|
|
20
1
|
%
UVI
|
Gain range = 18, 20-bit for UVI>5 UVI<5 |
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