VCNL3020 Datasheet by Vishay Semiconductor Opto Division

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Fully Integrated Proximity Sensor With Infrared Emitter,
I2C Interface, and Interrupt Function
DESCRIPTION
The VCNL3020 is a fully integrated proximity 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, PDA, GPS) for touch screen locking, power
saving, etc.
• Proximity / optical switch for consumer, computing and
industrial devices and displays
FEATURES
Package type: surface-mount
Dimensions (L x W x H in mm): 4.90 x 2.40 x 0.83
Integrated modules: infrared emitter (IRED),
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
•I
2C bus H-level range: 1.7 V to 5 V
Floor life: 72 h, MSL 4, 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
Note
(1) Adjustable through I2C interface
Note
(1) MOQ: minimum order quantity
7 nc
6 nc
9 GND
8 GND
10 IR cathode
IR anode 1
SDA 2
INT 3
SCL 4
VDD 5
PRODUCT SUMMARY
PART NUMBER
OPERATING
RANGE
(mm)
OPERATING
VOLTAGE RANGE
(V)
I2C BUS
VOLTAGE RANGE
(V)
LED PULSE
CURRENT (1)
(mA)
OUTPUT
CODE
ADC RESOLUTION
PROXIMITY /
AMBIENT LIGHT
VCNL3020 1 to 200 2.5 to 3.6 1.7 to 5 10 to 200 16 bit, I2C16 bit / -
ORDERING INFORMATION
ORDERING CODE PACKAGING VOLUME (1) REMARKS
VCNL3020-GS08 Tape and reel MOQ: 3300 pcs 4.90 mm x 2.40 mm x 0.83 mm
VCNL3020-GS18 MOQ: 13 300 pcs
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CIRCUIT BLOCK DIAGRAM
Note
nc must not be electrically connected
Pads 6 and 7 are only considered as solder pads
TEST CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL MIN. MAX. UNIT
Supply voltage VDD -0.3 5.5 V
Operation temperature range Tamb -25 +85 °C
Storage temperature range Tstg -25 +85 °C
Total power dissipation Tamb 25 °C Ptot 50 mW
Junction temperature Tj100 °C
BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL MIN. TYP. MAX. UNIT
Supply voltage VDD 2.5 3.6 V
Supply voltage IR anode 2.5 5 V
I2C Bus H-level range 1.7 5 V
INT H-level range 1.7 5 V
INT low voltage 3 mA sink current 0.4 V
Current consumption Standby current,
no IRED-operation 1.5 2 μA
Current consumption
proximity mode incl. IRED
(averaged)
2 measurements per second,
IRED current 20 mA A
250 measurements per second,
IRED current 20 mA 520 μA
2 measurements per second,
IRED current 200 mA 35 μA
250 measurements per second,
IRED current 200 mA 4mA
I2C clock rate range fSCL 3400 kHz
VCNL 3020
ASIC
1
2
3
4
5
VDD
IR Anode
SDA
SCL
INT
6
10
9
8
7
IR Cathode
GND
nc
nc
GND
IRED
Proxi PD
d = 20 mm
Kodak gray card
(18 % reflectivity)
VCNL3020 IRED
30 mm x 30 mm
Proxi-PD
22300-3
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BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
Fig. 1 - Idle Current vs. Ambient Temperature
Fig. 2 - Idle Current vs. VDD
Fig. 3 - Proximity Value vs. Distance
Fig. 4 - Forward Current vs. Temperature
Fig. 5 - Relative Radiant Intensity vs. Wavelength
Fig. 6 - Relative Radiant Intensity vs. Angular Displacement
2.4
1.0
1.2
1.4
1.8
1.6
2.0
2.2
110- 50
- 30
10 50 90
- 10
30 70
IDD - Supply Current Idle Mode (μA)
Tamb - Ambient Temperature (°C)22301
V
DD
= 3.6 V
V
DD
= 3.5 V
V
DD
= 3.3 V
V
DD
= 3.1 V V
DD
= 2.5 V
V
DD
= 2.7 V
V
DD
= 2.9 V
2.4
1.0
1.2
1.4
1.6
1.8
2.0
2.2
3.82.4 2.6 2.8 3.0 3.2 3.4 3.6
I
DD
- Supply Current Idle Mode (μA)
V
DD
- Supply Voltage (V)
22302
100 °C
80 °C
55 °C
25 °C
-10 °C
-40 °C
100 000
1
100
1000
10 000
10
0.1
1
10 100
Proximity Value (cts)
Distance to Reflecting Card (mm)
LED current 200 mA
Media: Kodak gray card
Mod. frequency = 390 kHz
LED current 100 mA
LED current 20 mA
250
0
50
100
150
200
140-60
-20
20 60 100
I
IRED
- Forward Current IRED (mA)
T
amb
- Ambient Temperature (°C)
22304
20 mA
40 mA
60 mA
80 mA
100 mA
120 mA
140 mA
160 mA
180 mA
200 mA
VIRED = 2.5 V
1.1
0
0.2
0.4
0.6
0.8
0.9
1.0
0.1
0.3
0.5
0.7
1050750
800
850 900 950 1000
I
e, rel
- Relative Radiant Intensity
λ - Wavelength (nm)
22305
I
F
= 100 mA
0° 20°
40°
60°
80°
0.6
0.7
0.8
0.9
1.0
00.10.20.30.40.5
I
rel
- Relative Radiant Intensity
22306
ϕ - Angular Displacement
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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 I2C 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 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.
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
I2C Bus Clock SCL
I2C Bus Data SDA
VCNL3020
INT (3)
SCL (4)
SDA (2)
GND (8, 9)
VDD (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
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2. I2C Interface
The VCNL3020 contains seventeen 8 bit registers for operation control, parameter setup and result buffering. All registers are
accessible via I2C communication. Figure 13 shows the basic I2C communication with VCNL3020.
The built in I2C interface is compatible with all I2C modes (standard, fast, and high speed).
I2C H-level range = 1.7 V to 5 V.
Please refer to the I2C specification from NXP for details.
Fig. 10 - Send Byte/Receive Byte Protocol
Device Address
The VCNL3020 has a fix slave address for the host
programming and accessing selection. The predefined 7 bit
I2C bus address is set to 0010 011 = 13h. The least
significant bit (LSB) defines read or write mode. Accordingly
the bus address is set to 0010 011x = 26h for write, 27h for
read.
Register Addresses
VCNL3020 has seventeen user accessible 8 bit registers.
The register addresses are 80h (register #0) to 90h
(register #16).
REGISTER FUNCTIONS
Register #0 Command Register
Register address = 80h
The register #0 is for starting proximity measurements. This register contains a flag bit for data ready indication.
Note
Beside prox_en first selftimed_en needs to be set. On-demand measurement mode is disabled if selftimed_en bit is set. For the selftimed_en
mode changes in reading rates (reg #2) can be made only when b0 (selftimed_en bit) = 0.
SSlave address
Rd
Receive byte Read data from VCNL3020
ARegister address A
Wr P
SSlave address PA
AData byte
Send byte Write command to VCNL3020
S = start condition
P = stop condition
A = acknowledge
Host action
VCNL3020 response
SSlave address A Register address A
Wr P
Data byte A
22313-3
TABLE 1 - COMMAND REGISTER #0
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
config_lock n/a prox_data_rdy n/a prox_od n/a prox_en selftimed_en
Description
config_lock Read only bit. Value = 1
prox_data_rdy Read only bit. Value = 1 when proximity measurement data is available in the result registers. This bit will
be reset when one of the corresponding result registers (reg #7, reg #8) is read.
prox_od R/W bit. Starts a single on-demand measurement for proximity.
Result is available at the end of conversion for reading in the registers #7(HB) and #8(LB).
prox_en R/W bit. Enables periodic proximity measurement
selftimed_en R/W bit. Enables state machine and LP oscillator for self timed measurements; no measurement is
performed until the corresponding bit is set
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Register #1 Product ID Revision Register
Register address = 81h. This register contains information about product ID and product revision.
Register data value of current revision = 21h.
Register #2 Rate of Proximity Measurement
Register address = 82h.
Note
If self_timed measurement is running, any new value written in this register will not be taken over until the mode is actualy cycled.
Register #3 LED Current Setting for Proximity Mode
Register address = 83h. This register is to set the LED current value for proximity measurement.
The value is adjustable in steps of 10 mA from 0 mA to 200 mA.
This register also contains information about the used device fuse program ID.
TABLE 2 - PRODUCT ID REVISION REGISTER #1
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Product ID Revision ID
Description
Product ID Read only bits. Value = 2
Revision ID Read only bits. Value = 1
TABLE 3 - PROXIMITY RATE REGISTER #2
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
n/a Rate of Proximity Measurement (no. of
measurements per second)
Description
Proximity rate
R/W bits.
000 - 1.95 measurements/s (DEFAULT)
001 - 3.90625 measurements/s
010 - 7.8125 measurements/s
011 - 16.625 measurements/s
100 - 31.25 measurements/s
101 - 62.5 measurements/s
110 - 125 measurements/s
111 - 250 measurements/s
TABLE 4 - IR LED CURRENT REGISTER #3
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Fuse prog ID IR LED current value
Description
Fuse prog ID Read only bits.
Information about fuse program revision used for initial setup/calibration of the device.
IR LED current value
R/W bits. IR LED current = Value (dec.) x 10 mA.
Valid Range = 0 to 20d. e.g. 0 = 0 mA , 1 = 10 mA, …., 20 = 200 mA (2 = 20 mA = DEFAULT)
LED Current is limited to 200 mA for values higher as 20d.
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Register #7 and #8 Proximity Measurement Result Register
Register address = 87h and 88h. These registers are the result registers for proximity measurement readings.
The result is a 16 bit value. The high byte is stored in register #7 and the low byte in register #8.
Register #9 Interrupt Control Register
Register address = 89h.
TABLE 5 - PROXIMITY RESULT REGISTER #7
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
Read only bits. High byte (15:8) of proximity measurement result
TABLE 6 - PROXIMITY RESULT REGISTER #8
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
Read only bits. Low byte (7:0) of proximity measurement result
TABLE 7 - INTERRUPT CONTROL REGISTER #9
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Int count exceed n/a INT_PROX_
ready_EN n/a INT_THRES_EN INT_THRES_
SEL
Description
Int count exceed
R/W bits. These bits contain the number of consecutive measurements needed above/below the
threshold
000 - 1 count = DEFAULT
001 - 2 count
010 - 4 count
011 - 8 count
100 -16 count
101 - 32 count
110 - 64 count
111 - 128 count
INT_PROX_ready_EN R/W bit. Enables interrupt generation at proximity data ready
INT_THRES_EN R/W bit. Enables interrupt generation when high or low threshold is exceeded
INT_THRES_SEL R/W bit. 0: thresholds are applied to proximity measurements
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Register #10 and #11 Low Threshold
Register address = 8Ah and 8Bh. These registers contain the low threshold value. The value is a 16 bit word. The high byte is
stored in register #10 and the low byte in register #11.
Register #12 and #13 High Threshold
Register address = 8Ch and 8Dh. These registers contain the high threshold value. The value is a 16 bit word. The high byte is
stored in register #12 and the low byte in register #13.
Register #14 Interrupt Status Register
Register address = 8Eh. This register contains information about the interrupt status indicates if high or low going threshold
exceeded.
Note
Once an interrupt is generated the corresponding status bit goes to 1 and stays there unless it is cleared by writing a 1 in the corresponding
bit. The int pad will be pulled down while at least one of the status bit is 1.
TABLE 8 - LOW THRESHOLD REGISTER #10
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
R/W bits. High byte (15:8) of low threshold value
TABLE 9 - LOW THRESHOLD REGISTER #11
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
R/W bits. Low byte (7:0) of low threshold value
TABLE 10 - HIGH THRESHOLD REGISTER #12
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
R/W bits. High byte (15:8) of high threshold value
TABLE 11 - HIGH THRESHOLD REGISTER #13
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Description
R/W bits. Low byte (7:0) of high threshold value
TABLE 12 - INTERRUPT STATUS REGISTER #14
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
n/a int_prox_ready n/a int_th_low int_th_hi
Description
int_prox_ready R/W bit. Indicates a generated interrupt for proximity
int_th_low R/W bit. Indicates a low threshold exceed
int_th_hi R/W bit. Indicates a high threshold exceed
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Register #15 Proximity Modulator Timing Adjustment
Register address = 8Fh.
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 proximity 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 proximity measurement demands 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.
Fig. 11 - 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.
TABLE 13 - PROXIMITY MODULATOR TIMING ADJUSTMENT #15
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Modulation delay time Proximity frequency Modulation dead time
Description
Modulation delay 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)
Proximity frequency
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
Modulation dead time
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.
SSlave address
Rd
Receive byte Read data from VCNL4020
ARegister address AWr P
SSlave address PA
AData byte
S = start condition
P = stop condition
A = acknowledge
Host action
VCNL4020 response
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Example: read register “Proximity Result Register” #7 and #8:
Addressing:command: 26h, 87h (VCNL3020_I2C_Bus_Write_Adr., Proximity Result Register #7 [87])
Read register #7: command: 27h, data (VCNL3020_I2C_Bus_Read_Adr., {High Byte Data of Proximity Result register #7 [87])}
Read register #8: command: 27h, data (VCNL3020_I2C_Bus_Read_Adr., {Low Byte Data of Proximity Result register #8 [88])}
PACKAGE DIMENSIONS in millimeters
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TAPE AND REEL DIMENSIONS in millimeters
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SOLDER PROFILE
Fig. 12 - Lead (Pb)-free Reflow Solder Profile
According to J-STD-020
DRYPACK
Devices are packed in moisture barrier bags (MBB) to
prevent the products from moisture absorption during
transportation and storage. Each bag contains a desiccant.
FLOOR LIFE
Floor life (time between soldering and removing from MBB)
must not exceed the time indicated on MBB label:
Floor life: 72 h
Conditions: Tamb < 30 °C, RH < 60 %
Moisture sensitivity level 4, according to J-STD-020.
DRYING
In case of moisture absorption devices should be baked
before soldering. Conditions see J-STD-020 or label.
Devices taped on reel dry using recommended conditions
192 h at 40 °C (+ 5 °C), RH < 5 %.
240 °C
Max. 260 °C
217 °C
255 °C
19841
10
100
1000
10000
0
100
200
300
0 50 100 150 200 300
Axis Title
1st line
2nd line
2nd line
Temperature (°C)
Time (s)
50
150
250
250
245 °C
Max. 100 s
Max. 30 s
Max. 120 s
Max. ramp down 6 °C/s
Max. ramp up 3 °C/s
— VISHAY. V
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Revision: 08-Feb-17 1Document Number: 91000
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