ISL29021_14 Datasheet, PDF (2/12 Pages) Intersil Corporation – Digital Proximity Sensor with Interrupt Function

ISL29021
Pinout
ISL29021
(8 LD ODFN
TOP VIEW)
VDDD 1
VDDA 2
GND 3
REXT 4
8 IRDR
7 INT
6 SDA
5 SCL
Pin Descriptions
EXPOSED PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
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. 499kΩ 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 V_DD, 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
2
FN6732.0
March 3, 2009