2

FN6189.4

December 17, 2010

Pin Descriptions

PIN

TYPE

PULL U/D

FUNCTION

OUT

Output

Adjustable Sink Current Output Pin. The current that sinks into the OUT pin is equal to the DAC setting times the

maximum adjustable sink current divided by 128. See SET pin function description for the maximum adjustable

sink current setting.

Supply

High-Voltage Analog Supply. Bypass to GND with 0.1µF capacitor.

WP

Input

designed for static control. It has an internal pull-down current sink. To avoid the possibly over-writing the

EEPROM contents, no frequency above 1Hz should be applied to this input. Care should be taken to avoid any

high to low transition on the WP pin results in the register contents being loaded with EEPROM data.

GND

Supply

Ground connection.

Supply

Digital power supply input. Bypass to GND with 0.1µF capacitor.

SDA

In/Out

SCL

Input

SET

Analog

Maximum Sink Current Adjustment Point. Connect a resistor from SET to GND to set the maximum adjustable

Block Diagram

GND

INTERFACE

DAC

REGISTERS

ANALOG DCP

AND

CURRENT SINK

7-BIT EEPROM

SCL

SDA

WP

OUT

SET

1

8

2

5

7

6

3

4

ISL45041

CURRENT SINK

Q1

A1

ISL45041