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AGT3209 데이터시트 PDF




Alta Analog에서 제조한 전자 부품 AGT3209은 전자 산업 및 응용 분야에서
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부품번호 AGT3209 기능
기능 Temperature Compensating Gamma Trimster
제조업체 Alta Analog
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AGT3209 데이터시트, 핀배열, 회로
PreliminarywIwnwf.oDramtaSahteieot4nU.com
Temperature Compensating Gamma Trimster™ ATT3209
FEATURES
9 Programmable Buffered Gamma
Correction Outputs (VGMA0 – VGMA8)
VGMA Output Range 0 to 14V
VGMA Output Accuracy Better Than 1% of
AVDD Reference
VGMA Output Drive > 100µA
Nonvolatile Storage of 32 Gamma
Reference Providing
Dynamic Gamma Correction and Gamma
Correction Based on Programmed
Temperature Profiles
2 Programmable Buffered VCOM Outputs
In System Programmability
Digital Programming Interface
APPLICATIONS
Yield Improvement through Gamma
Programming at Test
Simple Implementation of Dynamic Gamma
Compensation
LCD Panel Color Calibration
Optimized Temperature Dependent Gamma
Correction
DESCRIPTION
The ATT3209 is a programmable gamma
reference that is designed to address gamma
correction in high-resolution LCD panels.
The gamma voltage out puts are programmable
with their individual output values saved in a
nonvolatile analog storage cell. The storage
cells are arranged in a 9 x 32 array allowing
thirty-two gamma correction profiles to be
stored. Depending upon the application
requirements the ATT3209 is configured to
provide either two or three temperature
compensated Bank Select outputs that would be
used to drive the respective Bank Select inputs
of the AGT3209 Gamma Trimster.
In addition to the VGMA outputs there are two
programmable VCOM outputs providing
independent multiple VCOM trim points to
minimize flicker on the LCD panel.
Proprietary and Confidential
Typical Application
Rev 2/7/2005




AGT3209 pdf, 반도체, 판매, 대치품
Alta Analog
ATT3209
www.DataSheet4U.com
Nominal VGMA is dependent upon VREF1 and VREF 2 and is calculated as follows:
RRATIOx(VREF2-VREF 1)+VREF1
FIRST ORDER GAMMA CURVE VALUES
Symbol
Parameter
Test Condition
Min. Nom Max
Trim
Trim
VGMA0
Gamma 0 Output
RRATIO0 = 0.909 V REF2 = 14V, V REF1 = 7V
12.363 13.363 14.363
VGMA1
Gamma 1 Output
RRATIO1 = 0.660 V REF2 = 14V, V REF1 = 7V
10.618 11.618 12.618
VGMA2
Gamma 2 Output
RRATIO2 = 0.525 V REF2 = 14V, V REF1 = 7V
9.672 10.672 11.672
VGMA3
Gamma 3 Output
RRATIO3 = 0.393 V REF2 = 14V, V REF1 = 7V
8.754 9.754 10.754
VGMA4
Gamma 4 Output
RRATIO4 = 0.319 V REF2 = 14V, V REF1 = 7V
8.231 9.231 10.231
VGMA5
Gamma 5 Output
RRATIO5 = 0.264 V REF2 = 14V, V REF1 = 7V
7.849 8.849 9.849
VGMA6
Gamma 6 Output
RRATIO6 = 0.180 V REF2 = 14V, V REF1 = 7V
7.262 8.262 9.262
VGMA7
Gamma 7 Output
RRATIO7 = 0.024 V REF2 = 14V, V REF1 = 7V
6.168 7.168 8.168
VGMA8
Gamma 8 Output
RRATIO8 = 0 V REF2 = 14V, VREF1 = 7V
6 78
VGMA9
Gamma 8 Output
RRATIO8 = 0 V REF2 = 0V, V REF1 = 7V
6 78
VGMA10
Gamma 7 Output
RRATIO7 = 0.024 V REF2 = 0V, VREF1 = 7V
5.832 6.832 7.832
VGMA11
Gamma 6 Output
RRATIO6 = 0.180 V REF2 = 0V, VREF1 = 7V
4.74 5.74 6.74
VGMA12
Gamma 5 Output
RRATIO5 = 0.264 V REF2 = 0V, VREF1 = 7V
4.152 5.152 6.152
VGMA13
Gamma 4 Output
RRATIO4 = 0.319 V REF2 = 0V, VREF1 = 7V
3.767 4.767 5.767
VGMA14
Gamma 3 Output
RRATIO3 = 0.393 V REF2 = 0V, VREF1 = 7V
3.249 4.249 5.249
VGMA15
Gamma 2 Output
RRATIO2 = 0.525 V REF2 = 0V, VREF1 = 7V
2.325 3.325 4.325
VGMA16
Gamma 1 Output
RRATIO1 = 0.660 V REF2 = 0V, VREF1 = 7V
1.38 2.38 3.38
VGMA17
Gamma 0 Output
RRATIO0 = 0.909 V REF2 = 0V, V REF1 = 7V
0 0.637 1.637
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Proprietary and Confidential
Page 4
Revision 2/7/2005

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AGT3209 전자부품, 판매, 대치품
Alta Analog
VGMA
VGMA0
VGMA1
VGMA2
VGMA3
VGMA4
VGMA5
VGMA6
VGMA7
VGMA8
RRATIO
0.909
0.660
0.525
0.393
0.319
0.264
0.180
0.024
0.000
Table1: RRATIO Table.
Dynamic Gamma Compensation
In many applications, especially those which
involve the display of video information such as
movies or television programming, it is desirable
to be able to change the gamma curve based on
the active frame information. The ATT3209
stores thirty-two individual gamma curves that
can be dynamically ‘switched in’ by the panel’s
timing controller in response to the frame data.
Temperature and Gamma Profiles
The ATT3209 has two nonvolatile arrays. One
is the temperature profile. This array stores up
to eight programmable voltage references
against which the VTEMP input is compared.
As the VTEMP changes and transitions through
the preset temperature profile the low order
bank select (B0:B1 or B0:B2) will change,
effectively selecting a new gamma profile
optimal for the current temperature. These
signals used internally will also be output on the
B0:B2 pins.
The gamma profile array is comprised of thirty-
two (32) banks of nine (9) programmable
gamma outputs. The active bank, or profile, is
selected by 5 of the 6 bank select inputs. The
active bank select inputs are determined by the
state of DTSEL as shown in Table 2.
ATT3209 Active and Inactive Bank Pins
DTSEL B0 B1 B2 B3 B4 B5
VSS A A A A A IA
VCC A A IA A A A
Table 2. Active Bank Select pins.
ATT3209
www.DataSheet4U.com
When DTSEL is tied low, the ATT3209 is
configured with B0:B2 being used internally and
as active outputs reflecting the temperature
input, and B3 & B4 are used as the dynamic
gamma inputs.
When DTSEL is tied high, the ATT3209 is
configured with B0 & B1 being used internally
and as active outputs reflecting the temperature
input, and B3:B5 are used as the dynamic
gamma inputs.
ATT3209 and AGT3209
The ATT3209 is designed to work in conjunction
with the AGT3209. When they are paired the,
the bank select pins are connected as shown in
table 3.
B0
VSS B0
AGT3209 Pins
B1 B2 B3
B1 B2 B3
VCC B0 B1 B3 B4
Table 3. Shared pins.
B4
B4
B5
VCOM
The ATT3209 also provides two “trimmable”
VCOM outputs. The nominal output is equivalent
to Panel AVDD/2. The VCOM output voltage can
be trimmed to AVDD/2 ±1V. For example;
assume a LCD panel with a 14V panel AVDD,
then VCOM can be trimmed anywhere between
6V and 8V effectively in 8mV increments.
The ATT3209 is easily programmed either by
Alta Analog or the end user. It can be
programmed as a standalone device in most any
test fixture or in-circuit on the assembled LCD-
panel.
PROGRAMMING
The programming interface is a set of three
inputs plus a digital supply (VCC).
SDA is the serial data input pin used to input
instructions to the ATT3209.
VPP is a dual function pin. It is first used to clock
in the serial data stream. Once the instruction
has been issued VPP will then be used as the
programming voltage input pin.
AOUT is a buffered analog voltage output that
reflects the VGMA voltage level of the cell
Proprietary and Confidential
Page 7
Revision 2/7/2005

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관련 데이터시트

부품번호상세설명 및 기능제조사
AGT3209

Temperature Compensating Gamma Trimster

Alta Analog
Alta Analog

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