VCNL4100 Datasheet VCNL4100 | P7-P9

VCNL4100

www.vishay.com

Vishay Semiconductors

Rev. 1.2, 30-Aug-16

Document Number: 84319

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

APPLICATION INFORMATION

Pin Connection with the Host

VCNL4100 is a cost effective solution of a long distance proximity sensor with I

C interface. The standard serial digital interface

easily accesses “light intensity” by using simple calculations.

Application circuitry below shows the added MOSFET which is driven by the ASIC’s pin 2. A 22 k pull-up resistor needs to be

added here. The R

LED

defines the current through the IRED. A small 0.1 μF is sufficient at V

for power supply noise rejection,

but a 2.2 μF should be placed at V

IRED

to provide the energy for the IRED.

For the I

C bus design, the pull-up voltage refers to the I/O specification of the baseband due to its “open drain” design. The

pull-high resistors for the I

C bus lines are recommended to be  2.2 k.

Fig. 10 - Application Diagram

Notes

•V

range: 2.5 V to 3.6 V and V

IRED

is recommended 5.0 V

• Power path of V

and V

IRED

should be routed separately up to stable power source.

•The R

LED

resister value should be evaluated within ready-made application and the current through VCNL4100-internal IRED should not

exceed 800 mA.

Digital Interface

VCNL4100 applies single 8-bit slave address 0xC0 (HEX) following I

C 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

VCNL4100. As fig. 11 shows, VCNL4100’s I

C command format is simple for read and write operations between VCNL4100

and the host. The white sections indicate host activity and the gray sections indicate VCNL4100’s acknowledgement of the host

access activity. Write word and read word protocols are suitable for accessing registers particularly for 16-bit ALS data and

8-bit PS data. Interrupt can be cleared by reading data out from register: INT_Flag.

Fig. 11 - Command Protocol Format

INT

SCLK

VCNL4100

LED

CATHODE

0.1 μF

GND

SCK

SDA

IRED

2.2 μF

2.2 kΩ

pull up

PMOS

2.7 Ω

LED

LED+

LED-

2.2 kΩ 20 kΩ

MCU

SCLK

SDAT

8.2 kΩ

INT

S Slave Address

A Command Code A Data Byte Low A Data Byte High A

17 811 1

818

Send Byte ɦ Write Command to VCNL4100

Slave Address

A Command Code A S Slave Address

A Data Byte Low A

Data Byte High A P

11 8 1

711

Receive Byte ɦ Read Data from VCNL4100

S = start condition

P = stop condition

A = acknowledge

Shaded area = VCNL4100 acknowledge

VCNL4100

www.vishay.com

Vishay Semiconductors

Rev. 1.2, 30-Aug-16

Document Number: 84319

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

Function Description

VCNL4100 applies a 16-bit high resolution ALS that provides the best ambient light sensing capability up to 0.011375 lx/step

which works well under a low transmittance lens design (dark lens). A flexible interrupt function of ALS (register: ALS_CONF) is

also supported. The INT signal will not be asserted by VCNL4100 if the ALS value is not over high INT threshold window level,

or lower than low INT threshold window level of ALS. As long as the ALS INT is asserted, the host can read the data from

VCNL4100.

For proximity sensor function, VCNL4100 supports different kinds of mechanical design to achieve the best proximity detection

performance for any color object. The basic PS function settings, such as duty ratio, integration time, interrupt, and PS

enable / disable and persistence, are handled by the register: PS_CONF1. Duty ratio controls the PS response time. Integration

time represents the duration of the energy being received. The interrupt is asserted when the PS detection levels over 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 VCNL4100 that saves host loading from periodically reading PS data. More than that,

INT flag (register: INT_Flag) indicates the behavior of INT triggered under different conditions. PS persistence (PS_PERS) sets

up the PS INT asserted conditions as long as the PS output value continually exceeds the threshold level.

Descriptions of each slave address operation are shown in table 1.

TABLE 1 - COMMAND CODE AND REGISTER DESCRIPTION

COMMAND

CODE

NAME

R / W

DEFAULT

VALUE

FUNCTION DESCRIPTION

00H_L ALS_CONF R / W 00H ALS integration time, persistence, interrupt, and function enable / disable

00H_H Reserved R / W 00H Reserved

01H_L ALS_THDH_L R / W 00H ALS high interrupt threshold LSB byte

01H_H ALS_THDH_M R / W 00H ALS high interrupt threshold MSB byte

02H_L ALS_THDL_L R / W 00H ALS low interrupt threshold LSB byte

02H_H ALS_THDL_M R / W 00H ALS low interrupt threshold MSB byte

03H_L PS_CONF1 R / W 00H PS duty ratio, integration time, persistence, and PS enable / disable

03H_H PS_CONF2 R / W 00H PS gain, ITB, interrupt setting

04H_L PS_CONF3 R / W 00H PS active forced, averaging, background light cancellation setting

04H_H PS_SPO R / W 00H Set initial value to “0xA0” or “0x20”

05H_L Reserved R / W 00H Reserved

05H_H Reserved R / W 00H Reserved

06H_L PS_THDL R / W 00H PS low interrupt threshold setting

06H_H PS_THDH R / W 00H PS high interrupt threshold setting

07H_L Reserved R / W 00H Reserved

07H_H Reserved R / W 00H Reserved

08H_L PS_Data R 00H PS output data

08H_H Reserved R 00H Reserved

09H_L ALS_Data_L R 00H ALS LSB output data

09H_H ALS_Data_M R 00H ALS MSB output data

0AH_L Reserved R 00H Reserved

0AH_H Reserved R 00H Reserved

0BH_L Reserved R 00H Reserved

0BH_H INT_Flag R 00H ALS, PS interrupt flags

VCNL4100

www.vishay.com

Vishay Semiconductors

Rev. 1.2, 30-Aug-16

Document Number: 84319

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

Command Register Format

VCNL4100 provides an 8-bit command register for ALS and PS controlling independently. The description of each command

format is shown in following tables.



TABLE 2 - REGISTER: ALS_CONF DESCRIPTION

Command Bit76543210

ALS_CONF COMMAND CODE: 00H_L (00H DATA BYTE LOW)

Command Bit Description

ALS_IT 7 : 6

(0 : 0) = 80 ms; (0 : 1) = 160 ms; (1 : 0) = 320 ms; (1 : 1) = 640 ms

ALS integration time setting, longer integration time has higher sensitivity

Reserved 5 : 4 Default = (0 : 0), reserved

ALS_PERS 3 : 2

(0 : 0) = 1, (0 : 1) = 2, (1 : 0) = 4, (1 : 1) = 8

ALS interrupt persistence setting

ALS_INT_EN 1 0 = ALS interrupt disable, 1 = ALS interrupt enable

ALS_SD 0 0 = ALS power on, 1 = ALS shut down

TABLE 3 - REGISTER: RESERVE COMMAND DESCRIPTION

Reserved COMMAND CODE: 00H_H (00H DATA BYTE HIGH)

Command Bit Description

Reserved 7 : 0 Default = 00H

TABLE 4 - REGISTER ALS_THDH_L AND ALS_THDH_M DESCRIPTION

ALS_THDH_L

ALS_THDH_M

COMMAND CODE: 01H_L (01H DATA BYTE LOW)

COMMAND CODE: 01H_H (01H DATA BYTE HIGH)

ALS_THDH_L 7 : 0 00H to FFH, ALS high interrupt threshold LSB byte

ALS_THDH_M 7 : 0 00H to FFH, ALS high interrupt threshold MSB byte

TABLE 5 - REGISTER: ALS_THDL_L AND ALS_THDL_M DESCRIPTION

ALS_THDL_L

ALS_THDL_M

COMMAND CODE: 02H_L (02H DATA BYTE LOW)

COMMAND CODE: 02H_H (02H DATA BYTE HIGH)

ALS_THDL_L 7 : 0 00H to FFH, ALS low interrupt threshold LSB byte

ALS_THDL_M 7 : 0 00H to FFH, ALS low interrupt threshold MSB byte

TABLE 6 - REGISTER: PS_CONF1 DESCRIPTION

PS_CONF1 COMMAND CODE: 03H_L (03H DATA BYTE LOW)

Command Bit Description

PS_Duty 7 : 6

(0 : 0) = 1/5120, (0 : 1) = 1/640, (1 : 0) = 1/80, (1 : 1) = 1/20

PS IRED on / off duty ratio setting

PS_ IT 5 : 4

(0 : 0) = 1T, (0 : 1) = 1.3T, (1 : 0) = 1.6T, (1 : 1) = 2T

PS integration time setting

PS_PERS 3 : 2

(0 : 0) = 1, (0 : 1) = 2, (1 : 0) = 3, (1 : 1) = 4

PS interrupt persistence setting

Reserved 1 Default = 0, reserved

PS_SD 0 0 = PS power on, 1 = PS shut down

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P17

VCNL4100

Mfr. #:

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Manufacturer:

Vishay Semiconductors

Description:

Proximity Sensors RECOMMENDED ALT 78-VCNL4200

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