Datasheet

VCNL3020
www.vishay.com
Vishay Semiconductors
Rev. 1.2, 20-Mar-18
4
Document Number: 84150
For technical questions, contact: [e-mail]
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
Fig. 7 - Relative Spectral Sensitivity vs. Wavelength
(Proximity Sensor)
Fig. 8 - Relative Radiant Sensitivity vs. Angular Displacement
(Proximity Sensor)
APPLICATION INFORMATION
VCNL3020 is a cost effective solution of proximity sensor with I
2
C bus interface. The standard serial digital interface is easy to
access “Proximity Signal” without complex calculation and programming by external controller. Beside the digital output also
a flexible programmable interrupt pin is available.
1. Application Circuit
Fig. 9 - 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 I
2
C 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.
1.1
0
0.2
0.4
0.6
0.8
0.9
1.0
0.1
0.3
0.5
0.7
1100400
500
600 700 800 900 1000
S(λ)
rel
- Relative Spectral Sensitivity
λ - Wavelength (nm) 22307
0° 20°
40°
60°
80°
0.6
0.7
0.8
0.9
1.0
00.10.20.30.40.5
S
rel
- Relative Sensitivity
22308
ϕ - Angular Displacement
22312-4
Host
Micro Controller
I
2
C Bus Clock SCL
I
2
C Bus Data SDA
VCNL3020
INT (3)
SCL (4)
SDA (2)
GND (8, 9)
V
DD
(5)
IR_Anode (1)
C1 C2
C3C4
R1
100 nF
100 nF10 μF
22 μF
10R
GPIO
2.5 V to 3.6 V
2.5 V to 5.0 V
1.7 V to 5.0 V
R2 R3 R4