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PDF AGT3209 Data sheet ( Hoja de datos )
| Número de pieza | AGT3209 | |
| Descripción | Temperature Compensating Gamma Trimster | |
| Fabricantes | Alta Analog | |
| Logotipo |  |
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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
1 page  
Alta Analog
ATT3209
www.DataSheet4U.com
INPUT / OUTPUT FUNCTION DESCRIPTION
Name
VDD
AVDD
VGMA0-
VGMA8
Description
Digital Supply
Input
Analog Supply
Analog Outputs
Value Range
3V to 3.3V
10-14 V
VREF 1 to VREF 2
B0 – B2
Bank Select
I/O’s
B3 – B5
Bank Select
VREF 1/
VREF 2
AOUT
VPP
Input Reference
voltages
Analog Output
Programming
Voltage
&
Serial Clock
CMOS inputs
0-14 Volts
10-14Volts
VIL to VIH
DTSEL
Temperature
Profile Select
CMOS Input
VTEMP
Temperature
sensor input
ATTEN ATT enable input
OSC
BEN
Oscillator output
Bank ENABLE
CMOS input
Function
Analog Gamma Output Channels
During normal ATT3209 operation the B0 –
B2 pins are outputs that output the result of
the temperature profile logic.
The B3-B5 inputs are the dynamic bank
select inputs. The state of DTSEL
determines whether the banks are arranged
as 8 banks of 4 profiles or 4 banks of 8
profiles.
Reference voltages for generating VGMA
outputs.
Outputs the current value of the selected
channel of the selected bank during
programming
Dual Function:
Programming mode - Input for VPP pulses
for adjusting the VGMA output values.
Digital mode – clock input for serial
interface.
Internally this input tied to ground through a
100K ohm resistor. The state of DTSEL
selects the five B inputs that will be used by
the ATT3209. DTSEL low configures the
array 4 banks of 8 temperature profiles.
DTSEL high configures the array 8 dynamic
banks of 4 temperature profiles.
Internally this input tied to ground through a
100K ohm resistor. Temperature sensor
input to the programmable temperature
profile array.
Internally this input tied to ground through a
100K ohm resistor. This input should be tied
directly to VCC for normal device operation.
OSC is an output used during test and will
be a no–connect during normal device
operation.
Proprietary and Confidential
Page 5
Revision 2/7/2005
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AGT3209.PDF ] | |
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