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AD8385ASVZ Datasheet(PDF) 1 Page - Analog Devices |
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AD8385ASVZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page 10-Bit, 12-Channel Decimating LCD DECDRIVER® with Level Shifters AD8385 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 www.analog.com Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved. FEATURES High voltage drive to within 1.3 V of supply rails Output short-circuit protection High update rates Fast, 100 Ms/s 10-bit input data update rate Static power dissipation: 1.84 W Voltage controlled video reference (brightness), offset, and full-scale (contrast) output levels INV bit reverses polarity of video signal 3.3 V logic, 9 V to 18 V analog supplies Level shifters for panel timing signals High accuracy voltage outputs Laser trimming eliminates the need for adjustments or calibration Flexible logic STSQ/XFR allow parallel AD8385 operation Fast settling into capacitive loads 30 ns settling time to 0.25% into 150 pF load Slew rate 460 V/µs Available in 100-lead 14 mm × 14 mm TQFP E-pad GENERAL DESCRIPTION The AD8385 provides a fast, 10-bit, latched decimating digital input that drives 12 high voltage outputs. 10-bit input words are loaded into 12 separate high speed, bipolar DACs sequentially. Flexible digital input format allows several AD8385s 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, 8-bit DACs are integrated to provide dc reference signals. A 3-wire serial interface controls overload protection, output mode, and the serial DACs. The AD8385 is fabricated on ADI’s fast bipolar, 26 V XFHV process, which provides fast input logic, bipolar DACs with trimmed accuracy and fast settling, high voltage, precision drive amplifiers on the same chip. The AD8385 dissipates 1.84 W nominal static power. The AD8385 is offered in a 100-lead, 14 mm × 14 mm TQFP E-pad package and operates over the commercial temperature range of 0°C to 85°C. FUNCTIONAL BLOCK DIAGRAM BYP DYIN DIRYIN DIRXIN NRGIN DXIN ENBX1I ENBX2I ENBX3I ENBX4I CLXIN CLYIN MONITI SVRH SVRL SVRL SDI SCL SEN VRH VRH VRL R/L CLK STSQ XFR DB(0:9) INV V1 V2 TSTM CLX CLY CLXN CLYN MONITO AD8385 VAO1 VAO2 VID0 VID1 VID2 VID3 VID4 VID5 VID6 VID7 VID8 VID9 VID10 VID11 DY DIRY DIRX NRG DX ENBX1 ENBX2 ENBX3 ENBX4 SCALING CONTROL SEQUENCE CONTROL BIAS DACs 2-STAGE LATCH INV CONTROL 12-BIT SHIFT REGISTER DUAL DAC S R 9/ 2/ 3/ 3/ 3/ 4/ 10/ 9/ 2/ 2/ 12/ Figure 1. |
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