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AD8381 Datasheet

  • AD8381

  • Fast, High Voltage Drive, 6-Channel Output DecDriverTM Decim...

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a
Fast, High Voltage Drive, 6-Channel Output
DecDriver
TM
Decimating LCD Panel Driver
AD8381
FUNCTIONAL BLOCK DIAGRAM
10
DB (0:9)
10
10
DAC
VID0
2-STAGE
LATCH
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鈥?8 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/ s with 150 pF Load
Available in 48-Lead LQFP
APPLICATIONS
LCD Analog Column Driver
PRODUCT DESCRIPTION
10
AD8381
10
STBY
BYP
BIAS
10
2-STAGE
LATCH
10
DAC
VID1
2-STAGE
LATCH
10
DAC
VID2
2-STAGE
LATCH
10
DAC
VID3
E/O
L/R
CLK
STSQ
XFR
10
2-STAGE
LATCH
10
DAC
VID4
10
SEQUENCE
CONTROL
2-STAGE
LATCH
10
DAC
VID5
SCALING
CONTROL
VREFHI
VREFLO
INV
VMID
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鈥檚 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
脳
7
脳
1.4 mm LQFP
package and operates over the commercial temperature range of
0擄C to 85擄C.
DecDriver is a trademark of Analog Devices, Inc.
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.
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
漏 Analog Devices, Inc., 2002

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