10-Bit, 6-Channel Decimating
LCD DecDriver® with Level Shifters
AD8384
PRODUCT FEATURES
High accuracy, high resolution voltage outputs
FUNCTIONAL BLOCK DIAGRAM
10-bit input resolution
BYP
BIAS
Laser trimmed outputs
VRH
VRL
2
SCALING
CONTROL
Fast settling, high voltage drive
30 ns settling time to 0.25% into a 150 pF load
Slew rate 460 V/µs
Outputs to within 1.3 V of supply rails
High update rates
VID0
VID1
VID2
VID3
VID4
VID5
/
6
/
2-STAGE
LATCH
10
DACs
DB(0:9)
/
R/L
CLK
STSQ
XFR
4
/
SEQUENCE
CONTROL
INV
CONTROL
Fast, 100 Ms/s 10-bit input data update rate
Voltage controlled video reference (brightness), offset, and
full-scale (contrast) output levels
Flexible logic
STSQ/XFR allow parallel AD8384 operation
INV bit reverses polarity of video signal
Output short-circuit protection
INV
V1
V2
TSTM
SDI
SCL
SEN
12-BIT
SHIFT
REGISTER
VAO1
VAO2
3
2
DUAL
DAC
/
/
SVRH
SVRL
3.3 V logic, 9 V to 18 V analog supplies
18 V level shifters for panel timing signals
Available in 80-lead 12 mm × 12 mm TQFP E-pad
DYIN
DXIN
DIRYIN
DIRXIN
NRGIN
ENBX1IN
ENBX2IN
ENBX3IN
ENBX4IN
DY
DX
DIRY
DIRX
NRG
ENBX1
ENBX2
ENBX3
ENBX4
9
2
9
/
/
/
APPLICATIONS
LCD analog column drivers
2
2
CLX
CLY
/
/
CLXIN
CLYIN
CLXN
CLYN
R
S
MONITI
MONITO
AD8384
Figure 1.
PRODUCT DESCRIPTION
The AD8384 DecDriver provides a fast, 10-bit, latched,
The AD8384 is fabricated on the 26 V, fast, bipolar XFHV
process developed by Analog Devices, Inc. This process
provides fast input logic, bipolar DACs with trimmed accuracy
and fast settling, high voltage, precision drive amplifiers on the
same chip.
decimating digital input that drives six high voltage outputs.
10-bit input words are loaded sequentially into six separate high
speed, bipolar DACs. Flexible digital input format allows several
AD8384s to be used in parallel in high resolution displays. The
output signal can be adjusted for dc reference, signal inversion,
and contrast for maximum flexibility. Integrated level shifters
convert timing signals from a 3 V timing controller to high
voltage for LCD panel timing inputs. Two serial input, 8-bit
DACs are integrated to provide dc reference signals. DAC
addresses and 8-bit data are loaded in one 12-bit serial word.
The AD8384 dissipates 1.1 W nominal static power.
The AD8384 is offered in an 80-lead 12 mm × 12 mm TQFP
E-pad package and operates over the 0°C to 85°C commercial
temperature range.
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.
Specifications subject to change without notice. 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 owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.