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PDF VCNL4020X01 Data sheet ( Hoja de datos )
| Número de pieza | VCNL4020X01 | |
| Descripción | Fully Integrated Proximity and Ambient Light Sensor | |
| Fabricantes | Vishay | |
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www.vishay.com
VCNL4020X01
Vishay Semiconductors
Fully Integrated Proximity and Ambient Light Sensor with
Infrared Emitter, I2C Interface, and Interrupt Function
IR anode
SDA
INT
SCL
VDD
1
2
3
4
5
22620
10 IR cathode
9 GND
8 GND
7 nc
6 nc
DESCRIPTION
The VCNL4020X01 is a fully integrated proximity and
ambient light sensor. Fully integrated means that the
infrared emitter is included in the package. It has 16 bit
resolution. It includes a signal processing IC and features
standard I2C communication interface. It features an
interrupt function.
APPLICATIONS
• Proximity sensor for:
- Mobile devices (e.g. smart phones, touch phones,
PDAs, GPS) for touch screen locking, power saving etc.
- Automotive for presence detection
• Integrated ambient light function for display / keypad
contrast control and dimming of mobile devices
• Rear view mirror dimming in automotive
• Proximity / optical switch for consumer, computing,
automotive and industrial devices, and displays (like
notebooks, tablet PCs, and automotive touch panels)
• Dimming control for consumer, computing, industrial, and
automotive displays
FEATURES
• Package type: surface mount
• Dimensions (L x W x H in mm):
4.90 x 2.40 x 0.83
• AEC-Q101 qualified
• Integrated modules: infrared emitter (IRED),
ambient light sensor (ALS-PD), proximity
sensor (PD), and signal conditioning IC
• Interrupt function
• Supply voltage range VDD: 2.5 V to 3.6 V
• Supply voltage range IR anode: 2.5 V to 5 V
• Communication via I2C interface
• I2C bus H-level range: 1.7 V to 5 V
• Floor life: 168 h, MSL 3, according to J-STD-020
• Low stand by current consumption: 1.5 μA
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
PROXIMITY FUNCTION
• Built-in infrared emitter and photo-pin-diode for proximity
function
• 16 bit effective resolution for proximity detection range
ensures excellent cross talk immunity
• Programmable LED drive current from 10 mA to 200 mA in
10 mA steps
• Excellent ambient light suppression by signal modulation
• Proximity distance up to 200 mm
AMBIENT LIGHT FUNCTION
• Built-in ambient light photo-pin-diode with close-to-
human-eye sensitivity
• 16 bit dynamic range from 0.25 lx to 16 klx
• 100 Hz and 120 Hz flicker noise rejection
PRODUCT SUMMARY
PART
NUMBER
OPERATING
RANGE
(mm)
VCNL4020X01 1 to 200
OPERATING
VOLTAGE
RANGE
(V)
2.5 to 3.6
I2C BUS
VOLTAGE
RANGE
(V)
1.7 to 5
LED PULSE
CURRENT (1)
(mA)
10 to 200
AMBIENT
LIGHT
RANGE
(lx)
0.25 to 16 383
AMBIENT
LIGHT
RESOLUTION
(lx)
0.25
OUTPUT
CODE
16 bit, I2C
ADC
RESOLUTION
PROXIMITY /
AMBIENT LIGHT
16 bit / 16 bit
Note
(1) Adjustable through I2C interface
Rev. 1.2, 13-Aug-14
1 Document Number: 84177
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
1 page  
www.vishay.com
VCNL4020X01
Vishay Semiconductors
0° 20°
1.0
0.9 40°
Vertical
0.8 Horizontal
0.7
60°
0.6
80°
0.5 0.4 0.3 0.2 0.1 0
22311
Fig. 11 - Relative Radiant Sensitivity vs. Angular Displacement
(Ambient Light Sensor)
APPLICATION INFORMATION
VCNL4020X01 is a cost effective solution of proximity and ambient light sensor with I2C bus interface. The standard serial digital
interface is easy to access “Proximity Signal” and “Light Intensity” without complex calculation and programming by external
controller. Beside the digital output also a flexible programmable interrupt pin is available.
1. Application Circuit
2.5 V to 5.0 V
2.5 V to 3.6 V
C1 C2
22 μF 100 nF
R1
10R C4 C3
10 μF 100 nF
IR_Anode (1)
VDD (5)
VCNL4020X01
INT (3)
1.7 V to 5.0 V
R2 R3 R4
Host
Micro Controller
GPIO
GND (8, 9)
SCL (4)
SDA (2)
I2C Bus Clock SCL
I2C Bus Data SDA
Fig. 12 - Application Circuit
(x) = Pin Number
Notes
• The interrupt pin is an open drain output. The needed pull-up resistor may be connected to the same supply voltage as the application
controller and the pull-up resistors at SDA/SCL. Proposed value R2 should be >1 kΩ , e.g. 10 kΩ to 100 kΩ.
Proposed value for R3 and R4, e.g. 2.2 kΩ to 4.7 kΩ, depend also on the I2C bus speed.
For detailed description about set-up and use of the interrupt as well as more application related information see AN: “Designing VCNL3020
into an Application”.
• IR_Cathode needs no external connection. The needed connection to the driver is done internally.
Rev. 1.2, 13-Aug-14
5 Document Number: 84177
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
5 Page 
www.vishay.com
VCNL4020X01
Vishay Semiconductors
Register #15 Proximity Modulator Timing Adjustment
Register address = 8Fh.
TABLE 16 - PROXIMITY MODULATOR TIMING ADJUSTMENT #15
Bit 7
Bit 6
Modulation delay time
Bit 5
Bit 4
Bit 3
Proximity frequency
Description
Bit 2
Bit 1
Modulation dead time
Bit 0
Modulation delay time
Proximity frequency
Modulation dead time
R/W bits. Setting a delay time between IR LED signal and IR input signal evaluation.
This function is for compensation of delays from IR LED and IR photo diode. Also in respect to the
possibility for setting different proximity signal frequency. Correct adjustment is optimizing measurement
signal level. ( DEFAULT = 0)
R/W bits. Setting the proximity IR test signal frequency
The proximity measurement is using a square IR signal as measurement signal. Four different values are
possible:
00 = 390.625 kHz (DEFAULT)
01 = 781.25 kHz
10 = 1.5625 MHz
11 = 3.125 MHz
R/W bits. Setting a dead time in evaluation of IR signal at the slopes of the IR signal. ( DEFAULT = 1)
This function is for reducing of possible disturbance effects.
This function is reducing signal level and should be used carefully.
Note
• The settings for best performance will be provided by Vishay. With first samples this is evaluated to:
Delay Time = 0 ; Dead Time = 1 and Prox Frequency = 0 . With that register#15 should be programmed with 1 (= default value).
Register #16 Ambient IR Light Level Register
Register address = 90h.
This register is not intended to be used by customer.
3. IMPORTANT APPLICATION HINTS AND EXAMPLES
3.1 Receiver standby mode
In standby mode the receiver has the lowest current consumption of about 1.5 μA. In this mode only the I2C interface is active.
This is always valid, when there are no measurement demands for proximity and ambient light executed. Also the current sink
for the IR-LED is inactive, so there is no need for changing register #3 (IR LED current).
3.2 Data Read
In order to get a certain register value, the register has to be addressed without data like shown in the following scheme. After
this register addressing, the data from the addressed register is written after a subsequent read command.
Receive byte Read data from VCNL4020X01
S Slave address
Wr A Register address
AP
S Slave address
Rd A
Data byte
AP
S = start condition
P = stop condition
A = acknowledge
Host action
VCNL4020X01 response
Fig. 14 - Send Byte/Receive Byte Protocol
The stop condition between these write and read sequences is not mandatory. It works also with a repeated start condition.
Note
• For reading out 2 (or more) subsequent registers like the result registers, it is not necessary to address each of the registers separately. After
one read command the internal register counter is increased automatically and any subsequent read command is accessing the next
register.
Rev. 1.2, 13-Aug-14
11 Document Number: 84177
For technical questions, contact: [email protected]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet VCNL4020X01.PDF ] | |
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