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under any patent or patent rights of Analog Devices.
a
AD8381
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002
Fast, High Voltage Drive, 6-Channel Output
DecDriver
TM
Decimating LCD Panel Driver
FUNCTIONAL BLOCK DIAGRAM
DB (0:9)
VID0
VID1
VID2
VID3
VID4
2-STAGE
LATCH
XFR
VID5
DAC
10
10
10
10
10
10
10
10
10
10
10
10
DAC
2-STAGE
LATCH
2-STAGE
LATCH
2-STAGE
LATCH
2-STAGE
LATCH
2-STAGE
LATCH
DAC
10
SEQUENCE
CONTROL
DAC
DAC
DAC
BIAS
SCALING
CONTROL
VREFHI VREFLO INV VMID
STBY
BYP
CLK
STSQ
E/O
L/R
AD8381
FEATURES
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–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
Drives Capacitive Loads:
27 ns Settling Time to 1% into 150 pF Load
Slew Rate 265 V/H9262s with 150 pF Load
Available in 48-Lead LQFP
APPLICATIONS
LCD Analog Column Driver
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. STBY
pin reduces power to a minimum, with fast recovery.
The AD8381 is offered in a 48-lead 7 × 7 × 1.4 mm LQFP
package and operates over the commercial temperature range of
0°C to 85°C.
DecDriver is a trademark of Analog Devices, Inc.