Fast, High Voltage Drive, 6-Channel Output
®
a
DecDriver Decimating LCD Panel Driver
AD8381
FEATURES
FUNCTIONAL BLOCK DIAGRAM
High Voltage Drive:
Rated Settling Time to within 1.3 V of Supply Rails
Output Overload Protection
High Update Rates:
Fast, 100 Ms/s 10-Bit Input Word Rate
Low Power Dissipation: 570 mW
Includes STBY Function
Voltage Controlled Video Reference (Brightness) and
Full-Scale (Contrast) Output Levels
3.3 V or 5 V Logic and 9 V to 18 V Analog Supplies
High Accuracy:
Laser Trimming Eliminates External Calibration
Flexible Logic:
INV Reverses Polarity of Video Signal
STSQ/XFR for Parallel AD8381 Operation in
12-Channel Systems
10
10
10
10
10
10
10
10
10
10
10
10
10
2-STAGE
LATCH
DB (0:9)
DAC
DAC
DAC
DAC
DAC
DAC
VID0
VID1
VID2
VID3
VID4
VID5
2-STAGE
LATCH
AD8381
2-STAGE
LATCH
STBY
BYP
BIAS
2-STAGE
LATCH
E/O
R/L
2-STAGE
LATCH
Drives Capacitive Loads:
27 ns Settling Time to 1% into 150 pF Load
Slew Rate 265 V/s with 150 pF Load
Available in 48-Lead LQFP
CLK
2-STAGE
LATCH
SEQUENCE
CONTROL
STSQ
XFR
APPLICATIONS
LCD Analog Column Driver
SCALING
CONTROL
VREFHI
VREFLO
INV VMID
PRODUCT DESCRIPTION
The AD8381 provides a fast, 10-bit latched decimating digital
input, which drives six high voltage outputs. Ten-bit input
words are sequentially loaded into six separate high speed, bipolar
DACs. Flexible digital input format allows several AD8381s to be
used in parallel for higher resolution displays. STSQ synchronizes
sequential input loading, XFR controls synchronous output
updating and R/L controls the direction of loading as either
left-to-right or right-to-left. Six channels of high voltage
output drivers drive to within 1.3 V of the rail in rated settling
time. The output signal can be adjusted for brightness, signal
inversion, and contrast for maximum flexibility.
The AD8381 is fabricated on ADI’s proprietary, fast bipolar
24 V process, providing fast input logic, bipolar DACs with
trimmed accuracy and fast settling, high voltage precision drive
amplifiers on the same chip.
The AD8381 dissipates 570 mW nominal static power. The
STBY pin reduces power to a minimum, with fast recovery.
The AD8381 is offered in a 48-lead 7 mm ¥ 7 mm ¥ 1.4 mm
LQFP package and operates over the commercial temperature
range of 0∞C to 85∞C.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
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 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
© 2003 Analog Devices, Inc. All rights reserved.
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