ISL45042A_07 Datasheet, PDF (1/8 Pages) Intersil Corporation – LCD Module Calibrator

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Data Sheet
August 29, 2007
ISL45042A
FN6158.3
LCD Module Calibrator
The V_COM voltage of an LCD panel needs to be adjusted to
remove flicker. The ISL45042A can be used to digitally
adjust a panel’s V_COM voltage by controlling its output sink
current. The output of the ISL45042A is connected to an
external voltage divider and an external V_COM buffer
amplifier. In this application, the user can control the V_COM
voltage with 7-Bit accuracy (128 steps). Once the desired
V_COM setting is obtained, the settings can be stored in the
non-volatile EEPROM memory, which would then be
automatically recalled during every power-up.
The V_COM adjustment and non-volatile memory
programming is through a single interface pin (CTL). Once
the desired programmed value is obtained the Counter
Enable pin (CE) can be used to prevent further adjustment
or programming.
The full-scale sink current of the ISL45042A is set using an
external resistor connected to the SET pin. The full-scale
sink current determines the lowest voltage of the external
voltage divider.
The ISL45042A is available in an 8 Ld 3mmx3mm TDFN
package with a maximum thickness of 0.8mm for ultra thin
LCD panel design.
Pinout
ISL45042A
(8 LD TDFN)
TOP VIEW
OUT 1
AVDD 2
N/C 3
GND 4
8 SET
7 CE
6 CTL
5 V_DD
Features
• 128-Step Adjustable Sink Current Output
• 2.6V to 3.6V Logic Supply Voltage Operating Range
• 4.5V to 20V Analog Supply Voltage Range
• Rewritable EEPROM for storing the optimum V_COM value
• Output Adjustment Enable/Disable Control
• Output Guaranteed Monotonic Over-Temperature
• Two Pin Adjustment, Programming and Enable
• Ultra Thin 8 Ld 3mmx3mm DFN (0.8mm max)
• Pb-free available (RoHS compliant)
Applications
• LCD Panels
Ordering Information
TEMP.
PART NUMBER PART RANGE
(Note)
MARKING (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL45042AIRZ 42AZ
-40 to +85 8 Ld 3x3 TDFN L8.3x3A
ISL45042AIRZ-T* 42AZ
-40 to +85 8 Ld 3x3 TDFN
Tape and Reel
L8.3x3A
ISL45042AIRZ-TK* 42AZ
-40 to +85 8 Ld 3x3 TDFN
Tape and Reel
L8.3x3A
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special
Pb-free material sets; molding compounds/die attach materials and
100% matte tin plate PLUS ANNEAL - e3 termination finish, which is
RoHS compliant and compatible with both SnPb and Pb-free soldering
operations. Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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