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Low Voltage I2C Digital Ambient Light Sensor - LTR-329ALS-01

? I2C interface (Fast Mode @ 400kbit/s)
? Ultra-small ChipLED package
? 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 to +70°C
? RoHS and Halogen free compliant

Model Number: LTR-329ALS-01
Data Sheet:

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Product Specification

LTR-329ALS-01 Ambient Light Sensor Description
The LTR-329ALS-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. There are altogether six gain settings (1X, 2X, 4X, 8X, 48X and 96X) available for user to configure.

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-329ALS-01 Ambient Light Sensor Features
? I2C interface (Fast Mode @ 400kbit/s)
? Ultra-small ChipLED package
? 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 to +70°C
? RoHS and Halogen free compliant
? Light Sensor
- Close to human eye spectral response
- Immunity to IR / UV Light Source
- Automatically rejects 50 / 60 Hz lightings flicker
- 6 dynamic range from 0.01 lux to 64k lux
- 16-bit effective resolution

LTR-329ALS-01 Ambient Light Sensor Applications
To control display backlight in
? Mobile Devices: Mobile phone, PDA
? Computing Devices: Notebook PC, Desktop Monitor
? Consumer Devices: LCD/PDP TV backlight systems, Cameras, Personal Navigation Device,
? Digital Photo Frame
? Dashboard

LTR-329ALS-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	T_stg	-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
LED Supply Voltage	VLED	2.5		4.36	V
Interface Bus Power Supply Voltage	V_IO	1.7		3.6	V
Operating Temperature	T_ope	-30		70	°C

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

Parameter	Min.	Typ.	Max.	Unit	Condition
Active Supply Current			250	uA	Active Mode, T_ope= 25°C
Standby Current			5	uA	Standby / Sleep Mode
Initial Startup Time	60	100	1000	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	Full Scale ADC Count
Dark ADC Count	0		6	count	Ch0, Lux = 0
Dark ADC Count	0		6	count	Ch1, Lux = 0
ADC Count (Gain=96)	830 3250		1550 6100	count count	Ch0, Lux = 200 (White LED) Ch1, Lux = 200 (White LED) Integration Time : 50ms Measurement Time : 100ms
ALS Ratio	0.15		0.35	Ratio	Ratio = Ch1/(Ch1 + Ch0), Lux = 200 (White LED)