Home > Trade Leads > Electrical Components & Equipments > Sensors & Transducers > Photosensors > Sell > LTR-91400 Integrated Low Voltage I2C Ambient Light, Gesture And Proximity Sensor

LTR-91400 Integrated Low Voltage I2C Ambient Light, Gesture And Proximity Sensor

Post Date:

2018/11/07 17:33:59

Expired Date:

2019/02/05 23:59:59

Trade Leads Category:

Photosensors

Company Info

Shenzhen Week Technology Ltd.
Contact Person: Yan Zhang
Address: 16 Floor, Building #3, Zhongke Mansion, Gaoxin South 1St Rd, Hi-Tech Park, Nanshan
City: SHENZHEN
State/Province: GUANGDONG
Country/Region: China (mainland)
Zip/Post Code: 518067


Details

LTR-91400 Ambient Light Sensor, Gesture Sensor And Proximity Sensor Description
LTR-91400is an integrated low voltage I2C ambient light sensor [ALS], gesture sensor [GS] and proximity sensor [PS], with built-in emitter in a single miniature chipled lead-free surface mount package. 

This sensor converts light intensity to a digital output signal capable of direct I2C interface. The gesture sensor provides object motion direction information based on the reflected IR light detected by the 4 photodiodes for East, West, North and South direction. Besides, ambient light sensor provides a linear response over a wide dynamic range and is well suited to applications under high ambient brightness. With built-in proximity sensor (emitter and detector), it offers the feature to detect object at a user configurable distance.

The sensor supports an interrupt feature that removes the need to poll the sensor for a reading which improves system efficiency. The sensor 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 sensor-to-sensor variations for ease of manufacturability to the end customers.

LTR-91400 Ambient Light Sensor, Gesture Sensor And Proximity Sensor Application
To control brightness of the display panel, and/or detection of object or motion in mobile, computing, and consumer devices.

LTR-91400 Ambient Light Sensor, Gesture Sensor And Proximity Sensor Features
• I2C interface (Standard mode @100kHz or Fast mode @400kHz)
• Gesture, Ambient Light, and Proximity Sensing in one ultra-small ChipLED package
• Very low power consumption with sleep mode capability
• Operating voltage ranges: 2.4V to 3.6V
• Operating temperature ranges: -30 to +70°C
• Programmable interrupt function for ALS, PS, and GS.
• Built-in temperature compensation circuit
• RoHS and Halogen free compliant
•   GS Features
    - 4 photodiodes for East, West, North and South direction
    - 32 dataset storage FIFO
    - 8-bit effective resolution
    - Programmable LED drive settings
    - Programmable crosstalk correction 
•   ALS Features
    - 16-bits effective resolution
    - Wide dynamic range of 1:15,000,000 with linear response
    - Close to human eye spectral response
    - Automatic rejection for 50Hz/60Hz lighting flicker
•   PS Features
    - Built-in LED driver and detector
    - 11-bit effective resolution
    - Programmable LED drive settings
    - Programmable crosstalk correction 
    - High Ambient Light Suppression

LTR-91400 Ambient Light Sensor, Gesture Sensor And Proximity Sensor Rating and Specification
Absolute Maximum Rating 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 85 °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
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 Specifications (VDD = 3.0V, Ta=25°C, unless otherwise noted)
Parameter Min. Typ. Max Unit Condition
Active Supply Current 1   210   uA ALS in active mode
ALS integration time = 100ms
ALS measurement repeat rate = 400ms
Active Supply Current 2   100   uA PS in active mode, 25% Duty Cycle, 8us Pulse 
Width, 100mA, 8 Pulses
PS measurement repeat rate = 100ms
Not including VLED current
Active Supply Current 3   450   uA GS+PSin active mode, 25% Duty Cycle, 8us Pulse 
Width, 100mA, 8 Pulses
PS measurement repeat rate = 100ms
Full 32 dataset, GS wait time = 0ms
Standby Current     5 uA Standby / Sleep Mode
Initial Startup Time     100 ms Min wait time after power up (supply ramp up to 
2.4V) before sending I2C commands
Wakeup Time from Standby     10 ms Max wait time after turning device from stand-by to 
active before measurements starts
Leakage Current -5   5 uA SDA, SCL, INT pins

Characteristics ALS Ambient Light Sensor
Parameter Min. Typ. Max. Unit Condition
Full ADC Resolution   16   bits  
Dark Count   0 10 count Lux = 0, Tope=25°C
ADC Ch0 Count Gain X128   34000   count Lux=100, White LED, CCT~5K
ALS Lux Accuracy -20   20 %  
50/60 Hz flicker noise error -5   5 %  

Characteristics Proximity Sensor
Parameter Min. Typ. Max. Unit Condition
Full ADC Resolution   11   bits  
LED peak wavelength   940   nm  
Detection Distance 50     mm Under dark tinted window 25%
Duty Cycle, 8us Pulse Width, 
100mA, 2 Pulses, 
18% Gray Card
LED Pulse Width   8   us  
LED Duty Cycle   25   %  
LED Peak Current 12.5   300 mA Programmable LED current
Measurement repeat rate 6.125   800 msec  
Number of LED Pulses 1   15 Pulses  
Ambient Light Suppression     50K lux Direct Sunlight

Characteristics Gesture Sensor
Parameter Min. Typ. Max. Unit Condition
Full ADC Resolution   8   bits  
LED peak wavelength   940   nm  
FIFO RAM   32   set Sets of 4 bytes
Detection Distance    10   cm With recommended optical 
design
LED Pulse Width   8   us  
LED Duty Cycle   25   %  
LED Peak Current 12.5   300 mA  

Related Searches on ttnet.net: