ISL45041_1012 Datasheet, PDF (2/7 Pages) Intersil Corporation – TFT-LCD I2C Programmable VCOM Calibrator

ISL45041
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.
AV_DD
WP
Supply
Input
High-Voltage Analog Supply. Bypass to GND with 0.1µF capacitor.
Pull-Down
Write Protect. Active Low. To enable programming, connect to 0.7*V_DD supply or greater. The WP pin is
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
glitches on the input. When removing or applying mechanical jumpers, always ensure the V_DD power is off. A
high to low transition on the WP pin results in the register contents being loaded with EEPROM data.
GND Supply
Ground connection.
V_DD
SDA
SCL
Supply
In/Out
Input
Digital power supply input. Bypass to GND with 0.1µF capacitor.
I²C Serial Data Input and Output.
I²C Clock Input
SET Analog
Maximum Sink Current Adjustment Point. Connect a resistor from SET to GND to set the maximum adjustable
sink current of the OUT pin. The maximum adjustable sink current is equal to (AV_DD/20) divided by RSET.
Block Diagram
VDD
5
AVDD
2
6
SDA
7
SCL
3
WP
I²C
INTERFACE
DAC
REGISTERS
CURRENT SINK
7-BIT EEPROM
ISL45041
ANALOG DCP
AND
CURRENT SINK
Q1
A1
1
OUT
8
SET
4
GND
2
FN6189.4
December 17, 2010