Integrated I2C Digital Ambient Light Sensor and Proximity Sensor - LTR-507ALS-01

  • Integrated I2C Digital Ambient Light Sensor and Proximity Sensor
  • Integrated I2C Digital Ambient Light Sensor and Proximity Sensor
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• I2C interface
• Built-in temperature compensation circuit
• Programmable independent thresholds and interrupts
• Low active power consumption with shutdown mode
• Supply voltage range from 2.4V to 3.6V capable of 1.7 V logic voltage
• Operating temperaturerange from -40°C to +85°C
• RoHS and Halogen free compliant

  • Model Number: LTR-507ALS-01
  • Data Sheet: Date Sheet File
Quantity:
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Product Specification

LTR-507ALS-01 Ambient Light Sensor and Proximity Sensor Description
The LTR-507ALS-01 is an integrated I2C digital light sensor [ALS] and proximity sensor [PS] with built-in LED driver, in a miniature chipled lead-free surface mount package. This device converts light intensity to a digital output signal capable of direct I2C interface. It provides a linear response over a wide dynamic range and is well suited to applications under high ambient brightness. With built-in proximity sensor, LTR-507ALS-01 offers the feature to detect object at a user configurable distance of typical 50cm Gray Card.

The device supports an interrupt feature that removes the need to poll the sensor for a reading which improves system efficiency.  The device also supports several features that help to minimize the occurrence of false triggering.  This CMOS design and factory-set one time trimming capability ensure minimal device-to-device variations for ease of manufacturability to the end customers.

LTR-507ALS-01 Ambient Light Sensor and Proximity Sensor Features
• I2C interface (Standard mode@100kbit/s, Fast Mode@400kbit/s and High Speed Mode@3.4Mbit/s)
• Built-in temperature compensation circuit
• Programmable independent thresholds and interrupts
• Low active power consumption with shutdown mode
• Supply voltage range from 2.4V to 3.6V capable of 1.7 V logic voltage
• Operating temperaturerange from -40°C to +85°C
• RoHS and Halogen free compliant
•   Light Sensor Features
    - Close to human eye spectral response
    - 4 Gain Range Selections
    - Works under different light source conditions
    - Automatically rejects 50/60Hz lightings flicker
•   Proximity Sensor Features
    - Built-in LED driver and detector
    - Programmable LED drive settings
    - 11-bit effective resolution
    - High ambient light suppression

LTR-507ALS-01 Ambient Light Sensor and Proximity Sensor Application
To control display backlight and/or object detection 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-507ALS-01 Ambient Light Sensor and Proximity Sensor Rating and Specification
Absolute Maximum Rating at Ta=25°C

Parameter
Symbol
Rating
Unit
Supply Voltage
VDD
4.5
V
I2C Address Pin Voltage
SEL
-0.2 to 4.5
V
I2C Bus Pin Voltage
SCL, SDA
-0.2 to 4.5
V
I2C Bus Pin Current
SCL, SDA
10
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
LED Supply Voltage
VLED
2.5
4.35 V
I2C Bus Pin Voltage
Vbus
1.7
3.6
V
I2C Bus Input Pin High Voltage
VIH_SCL, VIH _SDA
1.3

V
I2C Bus Input Pin Low Voltage
VIL_SCL, VIL_SDA


0.3 V
Operating Temperature
Tope
-40
85 °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
Standby Current


5 uA
Standby / Sleep Mode
Initial Startup Time
100

ms
(Note 1)
Wakeup Time from Standb


10 ms
(Note 1)

Characteristics Ambient Sensor
Parameter
Min.
Typ.
Max.
Unit
Condition
Full Scale ADC Count
0
65535
count

Dark ADC Count
0
3 count
E = 0 lux, Dynamic range 1
CH1 Count
90
180 count
E=200 lux white LED (10K color temperature), 
Dynamic range 1, 1 to 64kux, 16 bit A DC

CH2 Count
25
55 count
E=200 lux white LED (10K color temperature), 
Dynamic range 1, 1 to 64kux, 16 bit ADC

Gain 2x
-5%

5%

Dynamic range 1
Gain 100x
-5%

5%

Dynamic range 1
Gain 200x
-5%

5%

Dynamic range 1

Characteristics Proximity Sensor
Parameter
 Min. 
 Typ. 
 Max. 
Unit
Condition
Full Scale ADC Count


2047
 count 

Peak Sensitivity

850

nm
Detection Distance

50
cm 18% Gray card IR LED=LTE-C249, 127 IR pulses
Ambient Light Suppression


50k
lux
Direct sunlight
LED Pulse Count
1
255 pulses

LED Pulse Frequency
30k

100k
Hz
Increment of 10k Hz
LED Duty Cycle

50%

% Fixed at 50% Duty Cycle
LED Peak Current

5
mA
LED Peak Current = 000

10
mA
LED Peak Current = 001

20
mA
LED Peak Current = 010

50
mA
LED Peak Current = 011
65

130 mA
LED Peak Current = 100/101/110/111

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