VCNL36825T
www.vishay.com
Vishay Semiconductors
Proximity Sensor With Interrupt, VCSEL, and I2C Interface
FEATURES
• Package type: surface-mount
• Dimensions (L x W x H in mm): 2.0 x 1.25 x 0.5
• Integrated modules: vertical cavity surface
emitting laser (VCSEL), proximity sensor (PS),
and signal conditioning IC
• Interrupt function
• 1.6 mm single hole opening design
• Supply voltage range VDD: 2.64 V to 3.6 V
• Low power consumption I2C (SMBus compatible
interface)
LINKS TO ADDITIONAL RESOURCES
• Output type: I2C bus
3D 3D
Design Tools
Related
Documents
3D Models
• Temperature compensation: -40 °C to +85 °C
Application
Notes
• Floor life: 168 h, MSL 3, according to J-STD-020
DESCRIPTION
VCNL36825T integrates a proximity sensor (PS), and a
VCSEL into one small package. It incorporates photodiodes,
amplifiers, and analog to digital converting circuits into a
single chip by CMOS process. PS programmable interrupt
features of individual high and low thresholds offers the best
utilization of resource and power saving on the
microcontroller.
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
PROXIMITY FUNCTION
• Immunity to red glow (940 nm IRED)
• Programmable IVCSEL sink current
• Intelligent cancellation to reduce cross talk phenomenon
• Smart persistence scheme to reduce PS response time
PIN DEFINITION
• Low power consumption mode
1
• Sunlight cancellation up to 100 klx
6
INTERRUPT
• Programmable interrupt function for PS with upper and
lower thresholds
• Adjustable persistence to prevent false triggers for PS
APPLICATIONS
3
4
• Handheld device
• Consumer device
1
INT
4
VDD
2
NC
5
SCL
3
GND
6
SDA
• Industrial application
• True wireless stereo (TWS) earphones
PRODUCT SUMMARY
PART
NUMBER
VCNL36825T
Rev. 1.3, 14-Sep-2021
OPERATING
RANGE
(mm)
OPERATING
VOLTAGE RANGE
(V)
I2C BUS
VOLTAGE RANGE
(V)
VCSEL DRIVING
CURRENT
(mA)
OUTPUT
CODE
ADC RESOLUTION
PROXIMITY /
AMBIENT LIGHT
200
2.64 to 3.6
1.7 to 3.6
20
12 bit, I2C
12 bit / -
Document Number: 80235
1
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ORDERING INFORMATION
ORDERING CODE
PACKAGING
VOLUME (1)
REMARKS
VCNL36825T
Tape and reel
MOQ: 4500 pcs, 4500 pcs/reel
2.0 mm x 1.25 mm x 0.5 mm
Note
(1) MOQ: minimum order quantity
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
TEST CONDITION
SYMBOL
MIN.
MAX.
UNIT
Supply voltage
VDD
-0.3
3.8
V
Operation temperature range
Tamb
-40
+85
°C
Storage temperature range
Tstg
-40
+100
°C
BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
TEST CONDITION
Supply voltage (1)
SYMBOL
MIN.
TYP.
MAX.
UNIT
VDD
2.64
-
3.6
V
Supply current
Excluding VCSEL driving
IDD
100
200
300
μA
Shutdown current
Light condition = dark;
VDD = 3.3 V, Tamb = 25 °C
IDD (SD)
-
1
-
μA
VPULL UP
1.65
-
-
V
V
I2C supply voltage
I2C
VDD = 3.3 V
VIH
1.26
-
-
I2C signal input, logic low
signal input, logic high
VDD = 3.3 V
VIL
-
-
0.73
V
Peak wavelength of VCSEL
IF = 12 mA
λp(VCSEL)
-
940
-
nm
PS view angle horizontal
-
± 45
-
°
PS view angle vertical
-
± 60
-
°
Note
(1) Based on VCSEL current setting, V
DD min. voltage need adjust, example as below
VCSEL current setting
10 mA
12 mA
14 mA
16 mA
18 mA
20 mA
Min. VDD
2.64 V
2.70 V
2.76 V
2.81 V
2.85 V
2.90 V
Rev. 1.3, 14-Sep-2021
Document Number: 80235
2
For technical questions, contact: sensorstechsupport@vishay.com
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
VCNL36825T
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Vishay Semiconductors
LABEL FOR LASER CLASS 1
LASER
1
Note
• Product specification with IEC / EN 60825-1:2014 compliance and above label
BLOCK DIAGRAM
VDD
VDD and anode are internally connected
Pin 4
PS timing
controller
PS
buffer
DSP
VCSEL
PD
Oscillator
INT
SCL
SDA
Current
driver
Pin 1
Pin 5
I2C bus logic
control
Pin 6
Pin 3
Pin 2
(n.c.)
GND
Rev. 1.3, 14-Sep-2021
Document Number: 80235
3
For technical questions, contact: sensorstechsupport@vishay.com
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
VCNL36825T
www.vishay.com
Vishay Semiconductors
I2C BUS TIMING CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
STANDARD MODE
SYMBOL
MIN.
MAX.
f(I2CCLK)
10
t(BUF)
4.7
t(HDSTA)
Repeated start condition setup time
Stop condition setup time
Data hold time
Data setup time
Clock frequency
Bus free time between start and stop condition
Hold time after (repeated) start condition;
after this period, the first clock is generated
FAST MODE
UNIT
MIN.
MAX.
100
10
400
kHz
-
1.3
-
μs
4.0
-
0.6
-
μs
t(SUSTA)
4.7
-
0.6
-
μs
t(SUSTO)
4.0
-
0.6
-
μs
t(HDDAT)
0
3450
0
900
ns
t(SUDAT)
250
-
100
-
ns
I2C clock (SCK) low period
t(LOW)
4.7
-
1.3
-
μs
I2C clock (SCK) high period
t(HIGH)
4.0
-
0.6
-
μs
Clock / data fall time
t(f)
-
300
-
300
ns
Clock / data rise time
t(r)
-
1000
-
300
ns
Note
• Data based on standard I2C protocol requirement, not tested in production
t(LOW)
I2C BUS
CLOCK
(SCLK)
t(r)
t(f)
VIH
VIL
t(HDSTA)
t(HIGH)
t(SUSTA)
t(SUSTO)
t(BUF)
t(HDDAT)
I2C BUS
DATA
(SDAT)
t(SUDAT)
VIH
Start
{
S
Start condition
{
P
Stop condition
{
{
VIL
S
P
Stop
t(LOSEXT)
SCLKACK
t(LOWMEXT)
SDAACK
t(LOWMEXT)
t(LOWMEXT)
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
Fig. 1 - I2C Bus Timing Diagram
Rev. 1.3, 14-Sep-2021
Document Number: 80235
4
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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PARAMETER TIMING INFORMATION
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
SA7
SA5
SA6
SA4
SA3
W
SA1
SA2
Start by
master
SA7
SA6
SA5
SA4
SA3
SA1
SA2
SA0
ACK by
VCNL36825T
ACK by
VCNL36825T
2
I C bus slave address byte
Command code
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
SA7
SA6
SA4
SA5
SA2
SA3
SA7
SA0
SA1
SA6
SA4
SA5
SA3
SA2
SA1
SA0
Stop by
ACK by
VCNL36825T master
ACK by
VCNL36825T
Data byte low
Data byte high
Fig. 2 - I2C Bus Timing for Sending Word Command Format
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
SA7
SA6
SA5
SA4
SA3
W
SA1
SA2
Start by
master
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
ACK by
VCNL36825T
ACK by
VCNL36825T
Command code
2
I C bus slave address byte
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
SA7
SA6
SA5
SA4
SA3
SA2
R
SA1
Start by
master
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
ACK by
master
ACK by
VCNL36825T
Data byte low
2
I C bus slave address byte
I2C BUS
CLOCK
(SCLK)
I2C BUS
DATA
(SDAT)
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
NACK by
master
Stop by
master
Data byte high
Fig. 3 - I2C Bus Timing for Receiving Word Command Format
Rev. 1.3, 14-Sep-2021
Document Number: 80235
5
For technical questions, contact: sensorstechsupport@vishay.com
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
VCNL36825T
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Vishay Semiconductors
TYPICAL PERFORMANCE CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
Axis Title
Axis0°
Title 10°
1000
60
50
40
100
30
20
10
0
400
500
600
700
800
900
10
1000
20°
10000
30°
1000
40°
1.0
0.9
50°
0.8
100
60°
70°
0.7
2nd line
70
2nd line
80
1st line
2nd line
Relative Response (%)
1st line
90
Ie, rel. - Relative Radiant Intensity
10000
- Angular Displacement
100
80°
10
0.6
Wavelength (nm)
2nd line
0.4
0.2
0
1st line
Fig. 4 - Normalized Spectral Response
Fig. 6 - VCSEL Profile
Axis Title
Axis Title
100
280
10000
10000
100
240
1000
1st line
2nd line
10
IDD - Supply Current (µA)
1st line
1000
1st line
2nd line
IF - Forward Current (mA)
1st line
260
220
200
100
180
160
1
10
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
140
10
-40
-20
0
20
40
60
80
VF - Forward Voltage (V)
2nd line
Temperature (°C)
2nd line
Fig. 5 - Forward Current vs. Forward Voltage
Fig. 7 - IDD vs. Temperature
Rev. 1.3, 14-Sep-2021
100
Document Number: 80235
6
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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
VCNL36825T
www.vishay.com
Vishay Semiconductors
APPLICATION INFORMATION
Pin Connection With the Host
VCNL36825T integrates proximity sensor, and IR VCSEL all together with I2C interface. It is very easy for the baseband (CPU)
to access PS output data via I2C interface without extra software algorithms. The hardware schematic is shown in the following
diagram.
One additional 1 μF capacitor in the circuit is used for power supply noise rejection, and 2.2 kΩ is proposed for the pull high
resistors of I2C except 10 kΩ applied on INT pin.
Vpull_up
VDD
1 µF
2.2 kΩ
2.2 kΩ
4
5
SCL
VDD
SCL
6
SDA
SDA
10 kΩ
VCNL36825T
Baseband
1
INT
INT
NC
2
NC or GND
GND
3
Fig. 8 - Hardware Pin Connection Diagram
Digital Interface
VCNL36825T applies single slave address 0x60 (HEX) of 7-bit addressing following I2C protocol. All operations can be
controlled by the command register. The simple command structure helps users easily program the operation setting and latch
the light data from VCNL36825T. As Fig. 9 shows, VCNL36825T’s I2C command format is simple for read and write operations
between VCNL36825T and the host. The white sections indicate host activity and the gray sections indicate VCNL36825T’s
acknowledgement of the host access activity. Write word and read word protocol is suitable for accessing registers particularly
for 12-bit PS data. Interrupt can be cleared by reading data out from register: INT_FLAG. All command codes should follow read
word and write word protocols.
Send byte write command to VCNL36825T
1
7
1
1
8
1
8
1
8
1
1
S
Slave address
Wr
A
Command code
A
Data byte low
A
Data byte high
A
P
Receive byte read data from VCNL36825T
1
7
1
1
8
1
1
7
1
1
8
1
8
1
1
S
Slave address
Wr
A
Command code
A
S
Slave address
Rd
A
Data byte low
A
Data byte high
N
P
S = start condition
P = stop condition
A = acknowledge
N = not acknowledge
Host action
VCNL36825T response
Fig. 9 - Write Word and Read Word Protocol
Rev. 1.3, 14-Sep-2021
Document Number: 80235
7
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
VCNL36825T
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Vishay Semiconductors
Function Description
VCNL36825T supports different kinds of mechanical designs to achieve the best proximity detection performance for any
color of object with more flexibility. The basic PS function settings, such as measurement period, integration time, interrupt, PS
start / stop and persistence, are handled by the register PS_CONF2_L. PS_PERIOD controls the PS response time. PS_IT
represents the duration of the energy being received. The PS_INT is asserted when the PS detection levels higher than the high
threshold level setting (register: PS_THDH) or lower than low threshold (register: PS_THDL). If the interrupt function is enabled,
the host reads the PS output data from VCNL36825T that saves host loading from periodically reading PS_DATA. More than
that, INT_FLAG indicates the behavior of INT triggered under different conditions. PS_PERS sets up the PS_INT asserted
conditions as long as the PS output value continually exceeds the threshold level. The intelligent cancellation level can be set
on register: PS_CANC to reduce the cross talk phenomenon.
A smart persistence (register: PS_SMART_PERS) is provided to get faster PS response time and prevent false trigger for PS.
TABLE 1 - COMMAND CODE AND REGISTER DESCRIPTION
COMMAND DATE BYTE
CODE
LOW / HIGH
0x00
0x03
0x04
0x05
0x06
0x07
0x08
0xF8
0xF9
0xFA
0xFB
REGISTER
NAME
R/W
DEFAULT
VALUE
L
PS_CONF1_L
R/W
0x01
H
PS_CONF1_H
R/W
0x00
Initialization
FUNCTION DESCRIPTION
Calibration and on / off
L
PS_CONF2_L
R/W
0x01
PS period, persistence, interrupt, smart persistence, and PS start /
stop
H
PS_CONF2_H
R/W
0x00
PS integration time, multi pulse and interrupt function
L
PS_CONF3_L
R/W
0x00
PS force mode and sunlight light protect interrupt setting
H
PS_CONF3_H
R/W
0x00
PS VCSEL current
L
PS_THDL_L
R/W
0x00
PS low interrupt threshold setting (data byte low)
H
PS_THDL_H
R/W
0x00
PS low interrupt threshold setting (data byte high)
L
PS_THDH_L
R/W
0x00
PS high interrupt threshold setting (data byte low)
H
PS_THDH_H
R/W
0x00
PS high interrupt threshold setting (data byte high)
L
PS_CANC_L
R/W
0x00
PS cancellation setting (data byte low)
H
PS_CANC_H
R/W
0x00
PS cancellation setting (data byte high)
L
PS_CONF4_L
R/W
0x00
PS auto-calibration period, number, interrupt setting
H
PS_CONF4_H
R/W
0x00
PS low power mode setting
L
PS_DATA_L
R
0x00
PS channel output data (data byte low)
H
PS_DATA_H
R
0x00
PS channel output data (data byte high)
L
Reserved
R
0x00
Reserved
H
INT_FLAG
R
0x00
PS interrupt flag
L
ID_L
R
0x26
Device ID (data byte low)
H
ID_H
R
0x00
Device ID (data byte high)
L
PS_AC_DATA_L
R
0x00
PS auto-calibration data (data byte low)
H
PS_AC_DATA_H
R
0x00
PS auto-calibration data (data byte high), busy and sunlight protect
Note
• All of reserved register are used for internal test. Please keep as default setting
Rev. 1.3, 14-Sep-2021
Document Number: 80235
8
For technical questions, contact: sensorstechsupport@vishay.com
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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Command Register Format
VCNL36825T provides an 8-bit command register for PS controlling independently. The description of each command format
is shown in following tables.
TABLE 2 - REGISTER: PS_CONF1_L DESCRIPTION
REGISTER NAME
Command
COMMAND CODE: 0x00_L (0x00 DATA BYTE LOW)
Bit
PS_CAL
7
Reserved
6:2
Description
Must be set to “1” when power on ready
Default = (0 : 0 : 0 : 0 : 0)
Set this bit = “1” to enable bias circuit
PS_ON
1
Reserved
0
Note
• Initialization process: step 1: PS_ON = “1”; step 2: set PS_CAL = “1”
Default = 1, must always stay = 1
TABLE 3 - REGISTER: PS_CONF1_H DESCRIPTION
REGISTER NAME
COMMAND CODE: 0x00_H (0x00 DATA BYTE HIGH)
Command
Bit
Reserved
15 : 10
Description
Reserved
9
Must be set to “1” when power on ready
Reserved
8
Default = 0
Default = (0 : 0 : 0 : 0 : 0 : 0)
TABLE 4 - REGISTER: PS_CONF2_L DESCRIPTION
REGISTER NAME
Command
COMMAND CODE: 0x03_L (0x03 DATA BYTE LOW)
Bit
Description
PS_PERIOD
7:6
(0 : 0) = 10 ms, (0 : 1) = 20 ms, (1 : 0) = 40 ms, (1 : 1) = 80 ms
PS measurement period setting
PS_PERS
5:4
(0 : 0) = 1, (0 : 1) = 2, (1 : 0) = 3, (1 : 1) = 4
PS interrupt persistence setting
PS_ INT
3:2
(0 : 0) = interrupt disable, (0 : 1) = logic high / low mode, (1 : 0) = first high, (1 : 1) = interrupt enable
PS_SMART_PERS
1
0 = disable smart persistence, 1 = enable smart persistence
PS_ST
0
0 = PS start, 1 = PS stop, default = 1; for active force mode set AF = 1 before setting PS_ST = 0
TABLE 5 - REGISTER: PS_CONF2_H DESCRIPTION
COMMAND CODE: 0x03_H (0x03 DATA BYTE HIGH)
Command
Bit
Description
PS_IT
15 : 14
(0 : 0) = 1T, (0 : 1) = 2T, (1 : 0) = 4T, (1 : 1) = 8T
PS_MPS
13 : 12
(0 : 0 ) = 1, (0 : 1) = 2, (1 : 0) = 4, (1 : 1) = 8;
PS multi-pulse setting
PS_ITB
PS_HG
Reserved
Rev. 1.3, 14-Sep-2021
11
10
9:8
0: ITB = 25 μs, 1: ITB = 50 μs
0 = disable, 1 = enable, PS high gain mode
Default = (0 : 0)
Document Number: 80235
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TABLE 6 - REGISTER: PS_CONF3_L DESCRIPTION
COMMAND CODE: 0x04_L (0x04 DATA BYTE LOW)
Register
Bit
Reserved
7
PS_AF
6
0 = auto mode; 1 = force mode
5
0 = no PS active force mode trigger, 1 = trigger one time cycle; VCNL36825T output one cycle data every
time host writes in “1” to sensor; the state returns to “0” automatically
PS_TRIG
Description
Default = 0
PS_FORCENUM
4
0 = one detect cycle after trigger, 1 = two detect cycle after trigger
Reserved
3
When use PS function, must write “1”
PS_SP_INT
2
0 = disable, 1 = enable, PS sunlight light protect INT setting
Reserved
1:0
Reserved
TABLE 7 - REGISTER: PS_CONF3_H DESCRIPTION
COMMAND CODE: 0x04_H (0x04 DATA BYTE HIGH)
Register
Bit
PS_SC
15 : 13
PS_HD
12
I_VCSEL
11 : 8
Description
Default = (0 : 0 : 0), with all 3 bit = “1”, (1 : 1 : 1), sunlight cancellation is enabled
0 = PS output is 12 bits, 1 = PS output is 16 bits
(0 : 0 : 0 : 0) = reserved; (0 : 0 : 0 : 1) = reserved; (0 : 0 : 1 : 0) = 10 mA; (0 : 0 : 1 : 1) = 12 mA;
(0 :1 : 0 : 0) = 14 mA; (0 : 1 : 0 : 1) = 16 mA; (0 : 1 : 1 : 0) = 18 mA; (0 : 1 : 1 : 1) = 20 mA;
VCSEL current selection setting
TABLE 8 - REGISTER: PS_THDL DESCRIPTION
COMMAND CODE: 0x05_L (0x05 DATA BYTE LOW) AND 0x05_H (0x05 DATA BYTE HIGH)
Command
Bit
Description
PS_THDL_L
7:0
0x00 to 0xFF, PS interrupt low threshold setting (data byte low)
PS_THDL_H
11 : 8
0x00 to 0x0F, PS interrupt low threshold setting (data byte high)
TABLE 9 - REGISTER: PS_THDH DESCRIPTION
COMMAND CODE: 0x06_L (0x06 DATA BYTE LOW) AND 0x06_H (0x06 DATA BYTE HIGH)
Command
Bit
Description
PS_THDH_L
7:0
0x00 to 0xFF, PS interrupt high threshold setting (data byte low)
PS_THDH_H
11 : 8
0x00 to 0x0F, PS interrupt high threshold setting (data byte high)
TABLE 10 - REGISTER: PS_CANC DESCRIPTION
COMMAND CODE: 0x07_L (0x07 DATA BYTE LOW) AND 0x07_H (0x07 DATA BYTE HIGH)
Command
Bit
Description
PS_CANC_L
7:0
0x00 to 0xFF, PS cancellation level setting (data byte low)
PS_CANC_H
11 : 8
0x00 to 0x0F, PS cancellation level setting (data byte high)
TABLE 11 - REGISTER: PS_CONF4_L DESCRIPTION
COMMAND CODE: 0x08_L (0x08 DATA BYTE LOW)
Register
Bit
Description
PS_AC_PERIOD
7:6
(0 : 0) = 3 ms, (0 : 1) = 6 ms, (1 : 0) = 12 ms, (1 : 1) = 24 ms; PS auto-calibration detect sample period setting
PS_AC_NUM
5:4
(0 : 0) = 1, (0 : 1) = 2, (1 : 0) = 4, (1 : 1) = 8; PS auto-calibration detect sample number setting
PS_AC
3
PS_AC_TRIG
2
0 = disable, 1 = enable; trigger one time auto-calibration
Reserved
1
Reserved
PS_AC_INT
0
0 = disable, 1 = enable; PS auto-calibration INT setting
Rev. 1.3, 14-Sep-2021
0 = disable, 1 = enable; PS auto-calibration enable; need set PS_AF = 1
Document Number: 80235
10
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VCNL36825T
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TABLE 12 - REGISTER: PS_CONF4_H DESCRIPTION
COMMAND CODE: 0x08_H (0x08 DATA BYTE HIGH)
Register
Bit
Reserved
15 : 11
Default = (0 : 0 : 0 : 0 : 0)
PS_LPPER
10 : 9
(0 : 0) = 40 ms, (0 : 1) = 80 ms, (1 : 0) = 160 ms, (1 : 1) = 320 ms;
PS detection period setting at low power mode (PS_LPEN = 1)
PS_LPEN
8
Description
0 = disable, 1 = enable = starts proximity low power measurements; now PS_LPPER used as period,
but I_VCSEL, PS_IT, PS_ITB, PS_MPS as defined within register 3 and register 4
TABLE 13 - READ OUT REGISTER DESCRIPTION
Register
Command Code
Bit
Description
PS_DATA_L
0xF8_L (0xF8 data byte low)
7:0
0x00 to 0xFF, PS output data (data byte low)
PS_DATA_H
0xF8_H (0xF8 data byte high)
11 : 8
0x00 to 0x0F, PS output data (data byte high)
INT_FLAG
0xF9_H (0xF9 data byte high)
15 : 14
13
12
11
10
9
8
Reserved
PS_ACFLAG, after PS finishing auto-calibration, INT raise
PS_SPFLAG, PS entering protection mode
Reserved
Reserved
PS_IF_CLOSE, PS rises above PS_THDH INT trigger event
PS_IF_AWAY, PS drops below PS_THDL INT trigger event
ID_L
0xFA_L (0xFA data byte low)
7:0
ID_H
0xFA_H (0xFA data byte high)
15 : 14
13 : 12
11 : 8
PS_AC_DATA_L
PS_AC_DATA_H
0xFB_L (0xFB data byte low)
7:0
0xFB_H (0xFB data byte high)
15
14
13 : 12
11 : 8
Default = 0010 0110, device ID (data byte low)
(0 : 0)
(0 : 0) slave address = 0x60
Version code (0 : 0 : 0 : 0) device ID (data byte high)
0x00 to 0xFF, PS auto-calibration data (data byte low)
AC_BUSY, when AC, the bit will be “1”
AC_SUN, PS enters sunlight protect during auto-calibration
Reserved
0x00 to 0xFF, PS auto-calibration data (data byte high)
Initialization
VCNL36825T includes default values for each register. As long as power is on, it is ready to be controlled by host via I2C bus.
Proximity Interrupt
There are three different Interrupt methods: “normal” interrupt mode, first high mode and so-called “logic high / low” mode.
The first high mode is selected by setting (0x03_L, bit 3:2 = 1:0) within register PS_CONF2_L. In this mode, the initial interrupt
that is triggered needs to be with regard to the high threshold (PS_THDH). Passing underneath the low threshold will have no
effect until the first high threshold event has occurred. In this mode, the interrupt event will remain set, until it is cleared, by
reading the interrupt register.
The “normal” interrupt mode is selected with PS_INT = interrupt enabled (0x03_L, bit 3 : 2 = 1 : 1) within register PS_CONF2_L.
Tests with ready-made application will show where to set the value for high threshold (PS_THDH) and low threshold (PS_THDL).
For more information and explanation please study also the application note www.vishay.com/doc?80274.
The “logic high / low” mode is selected with PS_INT = trigger by logic high/low mode (0x03_L, bit 3 : 2 = 0 : 1) within register
PS_CONF2_L. When this mode is selected, the interrupt pin is pulled low when the proximity counts reach the programmed
high threshold (PS_THDH) and will return to high level when counts drop below the count value for low threshold (PS_THDL).
With help of the function PS persistence one may also improve a reliable detection that not just one short event directly triggers
an interrupt, but only when 2 (or up to 4) consecutive proximity measurements are above the programmed threshold value the
interrupt will be set; please see also within the application note www.vishay.com/doc?80274.
Rev. 1.3, 14-Sep-2021
Document Number: 80235
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VCNL36825T
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PROXIMITY LOW POWER CONSUMPTION MODE
With register PS_LPEN set to 1, proximity sensor operate as low power consumption mode offering significant lower power
consumption of just 6.63 μA with response time of 320 ms for proximity detection. This is a remarkable feature for any
application requiring lower power consumption and did not want to always request one proximity measurement with proximity
force mode (PS_AF and PS_TRIG).
PS period (ms)
Low power mode (μA)
40
80
160
320
18.00
11.50
8.25
6.63
Note
• I_VCSEL = 10 mA, PS_IT = 1T, PS_ITB = 50 μs
PROXIMITY DETECTION HYSTERESIS
A PS detection hysteresis is important that keeps PS state in a certain range of detection distance. For example, PS_INT asserts
when PS value over PS_THDH. Host switches off panel backlight and then clears INT. When PS value is less than PS_THDL,
Host switches on panel backlight. Any PS value lower than PS_THDH or higher than PS_THDL, PS_INT will not be asserted.
Host does keep the same state.
Vpull_up
VDD
1 µF
2.2 k
2.2 k
4
5
VDD
SCL
SCL
6
SDA
SDA
10 k
VCNL36825T
Baseband
INT
1
INT
NC / GND
2
NC
GND
3
Fig. 10 - VCNL36825T Reference Circuit Connection With Host (proximity detection logic output mode)
(VCNL36825T INT pin connecting to host GPIO instead of INT pin)
Rev. 1.3, 14-Sep-2021
Document Number: 80235
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THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
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VCNL36825T
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PACKAGE INFORMATION in millimeters
Top view
Side view
1.25 ± 0.1
0.5 ± 0.1
3
4
6
1
4
3
0.075 ± 0.05
6
0.350 ± 0.05
0.700 ± 0.05
0.450 ± 0.05
0.743
2.00 ± 0.1
0.129
1
Bottom view
0.075 ± 0.05
1
INT
4
VDD
2
NC
5
SCL
3
GND
6
SDA
0.400 ± 0.05
Fig. 11 - VCNL36825T Package Dimensions
LAYOUT PAD INFORMATION in millimeters
0.300
0.725
0.725
0.500
0.400
0.700
Fig. 12 - VCNL36825T PCB Layout Footprint
RECOMMENDED STORAGE AND REBAKING CONDITIONS
PARAMETER
CONDITIONS
Storage temperature
MIN.
MAX.
UNIT
-40
85
°C
%
Relative humidity
-
60
Open time
-
168
h
From the date code on the aluminized envelope (unopened)
-
12
months
Tape and reel: 60 °C
-
22
h
Tube: 60 °C
-
22
h
Total time
Rebaking
Rev. 1.3, 14-Sep-2021
Document Number: 80235
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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
VCNL36825T
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RECOMMENDED INFRARED REFLOW
Soldering conditions which are based on J-STD-020 C
IR REFLOW PROFILE CONDITION
PARAMETER
CONDITIONS
Peak temperature
TEMPERATURE
TIME
260 °C + 5 °C / - 5 °C (max.: 265 °C)
10 s
150 °C to 200 °C
60 s to 180 s
Preheat temperature range and timing
Timing within 5 °C to peak temperature
Timing maintained above temperature / time
Timing from 25 °C to peak temperature
-
10 s to 30 s
217 °C
60 s to 150 s
-
8 min (max.)
Ramp-up rate
3 °C/s (max.)
-
Ramp-down rate
6 °C/s (max.)
-
Temperature (°C)
Recommend Normal Solder Reflow is 235 °C to 265 °C
Max. Temperature
260 °C + 5 °C / - 5 °C/10 s
260
200
150
Ramp-Down Rate
6 °C/s (max.)
Ramp-Up Rate
3 °C/s (max.)
217
Soldering Zone
60 s to 150 s
Ramp-Up Rate
3 °C/s (max.)
Pre-Heating Time
t2 - t1 = 60 s to 180 s
t2
t1
Time (s)
Fig. 13 - VCNL36826S Solder Reflow Profile Chart
RECOMMENDED IRON TIP SOLDERING CONDITION AND WARNING HANDLING
1. Solder the device with the following conditions:
1.1. Soldering temperature: 400 °C (max.)
1.2. Soldering time: 3 s (max.)
2. If the temperature of the method portion rises in addition to the residual stress between the leads, the possibility that an
open or short circuit occurs due to the deformation or destruction of the resin increases
3. The following methods: VPS and wave soldering, have not been suggested for the component assembly
4. Cleaning method conditions:
4.1. Solvent: methyl alcohol, ethyl alcohol, isopropyl alcohol
4.2. Solvent temperature < 45 °C (max.)
4.3. Time: 3 min (min.)
Rev. 1.3, 14-Sep-2021
Document Number: 80235
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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TAPE PACKAGING INFORMATION in millimeters
Rev. 1.3, 14-Sep-2021
Document Number: 80235
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