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ADD8701

Description
12-Channel Gamma Buffers with VCOM Buffer
File Size139KB,8 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet View All

ADD8701 Overview

12-Channel Gamma Buffers with VCOM Buffer

12-Channel Gamma Buffers
with VCOM Buffer
ADD8701
FEATURES
Single-Supply Operation: 7 V to 16 V
Dual-Supply Operation: 3.5 V to 8 V
Supply Current: 13 mA Max
Upper/Lower Buffers Swing to V
DD
/GND
Continuous Output Current: 10 mA
VCOM Peak Output Current: 250 mA
Offset Voltage: 15 mV Max
Slew Rate: 6 V/ s
Fast Settling Time with Large C-Load
APPLICATIONS
TFT LCD Panels
FUNCTIONAL BLOCK DIAGRAM
VCOM OUT
GND
V12
V11
V10
V9
V8
26
32
31
30
26
28
27
25
24
GND
23
V
DD
22
V6
21
V5
20
V4
19
V3
18
V2
17
V1
V
DD
VCOM IN
IN12
IN11
IN10
IN9
IN8
IN7
1
2
3
4
5
6
7
8
The ADD8701 is a low cost, 12-channel buffer amplifier and
VCOM driver that operates from a single supply. The part is
designed for high resolution TFT LCD panels, and is built on
an advanced, high voltage, CBCMOS process.
The buffers have high slew rate, 10 mA continuous output current,
and high capacitive load drive capability. The VCOM buffer has
increased drive of 35 mA and can drive large capacitive loads. The
ADD8701 offers wide supply range and offset voltages below 15 mV.
The ADD8701 is specified over the –40ºC to +85ºC tempera-
ture range and is available in a 32-lead lead frame chip scale
package (LFCSP).
All inputs and outputs incorporate internal ESD protection
circuits.
GND
IN6
IN5
IN4
IN3
IN2
IN1
V
DD
GENERAL DESCRIPTION
9
10
11
12
13
14
15
16
V7
V
DD
V12
TIMING AND CONTROL
GAMMA
REFERENCE
VOLTAGES
PANEL
TIMING
CONTROLLER
SCAN DRIVER CONTROL
SOURCE DRIVER
NO. 1
384
SOURCE DRIVER
NO. 2
384
SOURCE DRIVER
NO. 8
384
ADD8701
RESISTOR
LADDER
R
G
B
SCAN
DRIVERS
768
TFT COLOR PANEL
1024 768
VCOM OUT
V1
GND
VCOM IN
V
DD
Figure 1. Typical SVGA TFT-LCD Application
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.
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