ISL29021 查看數據表（PDF） - Renesas Electronics

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ISL29021

Digital Proximity Sensor with Interrupt Function

Renesas Electronics 

ISL29021

Pinout

ISL29021

(8 LD ODFN

TOP VIEW)

VDDD 1

VDDA 2

GND 3

REXT 4

8 IRDR

7 INT

6 SDA

5 SCL

EXPOSED PAD CAN BE CONNECTED TO GND OR

ELECTRICALLY ISOLATED

Pin Descriptions

PIN NUMBER PIN NAME

DESCRIPTION

1

VDDD Positive digital supply: 2.5V to 3.63V.

2

VDDA Positive analog supply: 2.5V to 3.63V, VDDA and VDDD should be externally shorted.

3

GND Ground.

4

REXT External resistor pin setting the internal reference current and the conversion time. 499k with 1% tolerance resistor

is recommended.

5

SCL I2C serial clock line

6

SDA I2C serial data line

The I2C bus lines can be pulled from 1.7V to above VDD, 3.63V max.

7

INT Interrupt pin; LO for interrupt/alarming. The INT pin is an open drain.

8

IRDR IR LED driver pin connecting to the anode of the external IR LED. The source current of the IR LED driver can be

programmed through I2C.

Exposed pad connected to ground or electrically isolated.

Block Diagram

VDDA

2

VDDD

1

IR DATA

PROCESS

IR PHOTODIODE

ARRAY

IREF

FOSC

INTEGRATION

ADC

4

REXT

3

GND

ISL29021

COMMAND

REGISTER

DATA

REGISTER

I2C

INTERRUPT

IR DRIVER

6 SDA

5 SCL

7 INT

8 IRDR

FN6732 Rev 0.00

March 3, 2009

Page 2 of 12

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