max9590 Maxim Integrated Products, Inc., max9590 Datasheet
max9590
Manufacturer Part Number
max9590
Description
14 Programmable Gamma Reference Buffers With 4 Static References For Tft-lcd Displays
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX9590.pdf
(1 pages)
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The MAX9590 provides 14 programmable voltage
references and 4 static voltage references for gamma
correction in TFT-LCD displays. Two register banks are
provided to store two sets of gamma reference values.
Gamma values are programmed into the banks through
the I
values in 0.5µs.
The 14 programmable reference voltages are divided
evenly into seven upper and seven lower voltages for the
upper and lower gamma curves of LCD column drivers.
Each gamma reference voltage has an 8-bit DAC and
isolation buffer associated with it to ensure stable
operation. Therefore, the reference voltages remain
stable without synchronizing to the LCD horizontal timing.
In addition, each buffer is able to provide a high current
that further ensures a stable voltage when critical levels
and patterns are displayed.
The 14 programmable buffers wake-up in high-impedance
state until the registers are programmed. This protects
the LCD system from high transient currents during the
startup phase.
The MAX9590 is available in a 38-pin TQFN package
and is specified for operation over the -40°C to +85°C
temperature range.
XX-XXXX; Rev 0; 4/06
+ 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
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.
MAX9590ETU+
TFT-LCD Displays
Industrial Reference Voltage Generators
2
C* interface and the outputs can switch between
PART
2
C Standard Specification as defined by Philips.
14 Programmable Gamma Reference Buffers with
2
2
C components from Maxim Integrated Products,
C system, provided that the system conforms
-40°C to +85°C
TEMP RANGE
________________________________________________________________ Maxim Integrated Products
Ordering Information
General Description
2
C Patent Rights to use these com-
4 Static References for TFT-LCD Displays
PIN-PACKAGE
38 TQFN
(5mm x 7mm)
Applications
T3857-1
CODE
PKG
o
o
o
o
o
o
o
o
o
BANK_SEL
STD_REG
REFU_H
REFU_L
REFL_H
REFL_L
14 Programmable Reference Voltages
4 Static Reference Voltages
Independent DACs with 8-Bit Resolution
Two Register Banks for Two Sets of
Gamma Values
Fast Switching between Gamma Values
16.5V (max) Operating Voltage
Output Swing within 150mV of Rails
Peak Current Greater than 200mA
Output Channels Tri-Stated During Wake-Up
DV
AV
GND
CAP
SDA
SCL
DD
A0
DD
I
2
C INTERFACE
MEMORY
MEMORY
MEMORY
MEMORY
BANK A
BANK B
BANK A
BANK B
(HIGH)
(HIGH)
(LOW)
(LOW)
Block Diagram
MAX9590
Features
OUT1
OUT2
OUT3
OUT7
OUT_REFU_L
OUT8
OUT9
OUT10
OUT14
OUT_REFU_H
OUT4
OUT5
OUT6
OUT_REFL_H
OUT11
OUT12
OUT13
OUT_REFL_L
1
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