MAX8738 Maxim Integrated Products, MAX8738 Datasheet
MAX8738
Manufacturer Part Number
MAX8738
Description
EEPROM-Programmable TFT VCOM Calibrator
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8738.pdf
(13 pages)
www.DataSheet4U.com
The MAX8738 is an I
ment solution for thin-film transistor (TFT) liquid-crystal
displays (LCDs). The MAX8738 simplifies the labor-inten-
sive VCOM-adjustment process and replaces mechani-
cal potentiometers, which significantly reduces labor
costs, increases reliability, and enables automation.
The MAX8738 attaches to an external resistive voltage-
divider and sinks a programmable current to set the
VCOM voltage level. An internal 7-bit digital-to-analog
converter (DAC) controls the sink current. The DAC is
ratiometric relative to AVDD and is guaranteed to be
monotonic over all operating conditions. This VCOM
calibrator IC includes an EEPROM to store the desired
VCOM voltage level. The EEPROM can be programmed
repeatedly, giving TFT LCD manufacturers the flexibility
to calibrate the display panel as many times as the
manufacturing process requires.
The MAX8738 features a 2-wire I
adjustment commands and EEPROM programming.
The interface utilizes the existing I
panel connector so no additional panel connector pins
are required. The MAX1512 is a similar product with a
1-wire interface and is recommended for applications
with no existing I
The MAX8738 is available in an 8-pin µMAX
A complete evaluation kit is available to simplify evalua-
tion and production development.
19-3624; Rev 0; 3/05
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
LCD Panels
Notebook Computers
Display Products
LCD TVs
AVDD
GND
OUT
V
2
DD
C interface.
________________________________________________________________ Maxim Integrated Products
1
2
4
3
2
C-programmable VCOM-adjust-
General Description
MAX8738
MAX
Pin Configuration
EEPROM-Programmable TFT VCOM
2
C* interface for DAC-
8
7
6
5
2
Applications
C bus on the LCD
SET
SCL
SDA
HV
®
package.
Calibrator with I
♦ 7-Bit Adjustable Sink-Current Output
♦ Resistor-Adjustable, Full-Scale Range
♦ Guaranteed Monotonic Output Over Operating
♦ 2-Wire I
♦ EEPROM Stores VCOM Setting
♦ 4.5V to 20V Analog Supply Voltage Range
♦ 60µA (max) AVDD Supply Current
♦ 16.1V to 28V EEPROM Programming Supply
♦ <1µA HV Supply Current (Not in Program Mode)
♦ 8-Pin µMAX
+Denotes lead-free package.
Purchase of I
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I
ponents in an I
to the I
MAX8738EUA
MAX8738EUA+
BUS
Range
(V
Voltage Range (V
I
2
C
AVDD
PART
2
C Standard Specification as defined by Philips.
+3.3V
)
2
C Interface
2
C components from Maxim Integrated Products,
2
C system, provided that the system conforms
Typical Operating Circuit
SDA
SCL
V
GND
DD
MAX8738
HV
TEMP RANGE
-40
-40
Ordering Information
R
SET
)
o
o
2
C to +85
C to +85
C Patent Rights to use these com-
VGON
AVDD
2
HV
OUT
SET
C Interface
AVDD
o
o
C
C
R2
R1
PIN-PACKAGE
8 µMAX
8 µMAX
Features
VCOM
1
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