VCNL4020C

www.vishay.com

Vishay Semiconductors

Rev. 1.1, 20-Mar-18

1

Document Number: 84350

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

High Resolution Digital Biosensor for Wearable Applications

With I2C Interface

DESCRIPTION

The VCNL4020C is a fully integrated biosensor 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

• Wearables

• Health monitoring

•Pulse oximetry

FEATURES

• Package type: surface-mount

• Package form: SMD

• Dimensions (L x W x H in mm): 4.90 x 2.40 x 0.83

• Integrated modules: infrared emitter (IRED),

ambient light sensor (ALS), photo diode (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: 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

OPTICAL BIOSENSORS FUNCTION

• Built-in

infrared

emitter

and

broader

sensitivity

photodiode allows to also work with green and red LEDs

• 16 bit effective resolution ensures excellent cross talk

immunity

• Programmable LED drive current from 10 mA to 200 mA in

10 mA steps

• Excellent ambient light suppression through signal

modulation

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

Note

(1) Adjustable through I2C interface

7

nc

6

nc

9

GND

8

GND

10 IR cathode

IR anode

1

SDA

2

INT

3

SCL

4

V

DD

5

22620

PRODUCT SUMMARY

PART

NUMBER

OPERATING

VOLTAGE

RANGE

(V)

I2C BUS

VOLTAGE

RANGE

(V)

LED PULSE

CURRENT (1)

(mA)

AMBIENT

LIGHT

RANGE

(lx)

SPECTRAL

BANDWIDTH

RANGE

λ0.5 (nm)

OUTPUT

CODE

ADC RESOLUTION

BIOSENSOR / AMBIENT

LIGHT SENSOR

VCNL4020C

2.5 to 3.6

1.7 to 5

10 to 200

0.25 to 16 383

550 to 970

16 bit, I2C

16 bit / 16 bit