Low Voltage I2C Digital Ambient Light Sensor - LTR-303ALS-01

  • Low Voltage I2C Digital Ambient Light Sensor
  • Low Voltage I2C Digital Ambient Light Sensor
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• I2C interface (Fast Mode @ 400kbit/s)
• Ultra small 6 pin ChipLED package
• 2.0mm(L), 2.0mm(B), 0.7mm(H)
• Built-in temperature compensation circuit
• Low active power consumption with standby mode
• Supply voltage range from 2.4V to 3.6V capable of 1.7V logic voltage
• Operating temperature range from -30°C - 70°C

  • Model Number: LTR-303ALS-01
  • Data Sheet: Date Sheet File
Quantity:
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Product Specification

LTR-303ALS-01 Ambient Light Sensor Description
The LTR-303ALS-01 is a low voltage I2C digital light sensor [ALS] in a low cost miniature 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 response over a wide dynamic range from 0.01 lux to 64k lux and is well suited to applications under high ambient brightness.

LTR-303ALS-01 Ambient Light Sensor Features
• I2C interface (Fast Mode @ 400kbit/s)
• Ultra small 6 pin ChipLED package 
• 2.0mm(L), 2.0mm(B), 0.7mm(H)
• Built-in temperature compensation circuit
• Low active power consumption with standby mode
• Supply voltage range from 2.4V to 3.6V capable of 1.7V logic voltage
• Operating temperature range from -30°C - 70°C
• RoHS and Halogen free compliant
• Close to human eye spectral response
• Immunity to IR / UV Light Source
• Automatically rejects 50 / 60 Hz lightings flicker
• Full dynamic range from 0.01 lux to 64k lux
• 16-bit effective resolution

LTR-303ALS-01 Ambient Light Sensor Applications
• Back-lighting Control in mobile/portable devices 
• Touch Panel Control in mobile/portable devices

LTR-303ALS-01 Ambient Light Sensor Ratings and Specifications
Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Rating

Unit

Supply Voltage

VDD

3.8

V

Digital Voltage Range

SCL, SDA, INT

-0.5 to 3.8

V

Digital Output Current

SCL, SDA, INT

-1 to 20

mA

Storage Temperature

Tstg

-40 to 100

°C
Note:Exceeding these ratings could cause damage to the sensor. All voltages are with respect to ground. Currents are positive into, negative out of the specified terminal.

Recommended Operating Conditions

Description

Symbol

Min.

Typ.

Max.

Unit

Supply Voltage

VDD

2.4

 

3.6

V

Interface Bus Power Supply Voltage

VIO

1.7

 

3.6

V

I2C Bus Input Pin High Voltage

VIH SCL, VIH SDA

1.2

 

 

V

I2C Bus Input Pin Low Voltage

VIL SCL, VIL SDA

 

 

0.6

V

Operating Temperature

Tope

-30

 

70

°C


Electrical & Optical Specifications
All specifications are at VDD = 3.0V, Tope= 25°C, unless otherwise noted.

Parameter

Min.

Typ.

Max.

Unit

Condition

Active Supply Current

 

 

220

uA

Active Mode,

Tope= 25°C, 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)


Light Sensor

Parameter
Min.
Typ.
Max.
Unit
Condition
Full Scale ADC Count


65535
count

Dark ADC Count
0
6 count
Ch0, Lux = 0
0
6 count
Ch1, Lux = 0
ADC Count (Gain=96)
@200Lux
3250

6100
count
Ch1 (see note 2)
White LED 200 Lux
Integration Time : 50ms
Measurement Time : 100ms
1050

1950
count
Ch1 (see note 2)
White LED 200 Lux
Integration Time : 50ms
Measurement Time : 100ms
0.15

0.35 Ratio
Ch1/(Ch0 + Ch1)

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