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AD8387-EB Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD8387-EB Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 16 page High Performance, 12-Bit, 12-Channel Decimating, LCD DecDriver® AD8387 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. FEATURES High accuracy, high-resolution voltage outputs 1 mV channel matching 12-bit input resolution Laser-trimmed outputs Fast settling, high voltage drive 35 ns settling time to 0.25% into 150 pF load Slew rate 420 V/μs Outputs to within 1.3 V of supply rails High update rates Fast, 110 MHz clock Programmable video reference (brightness) and full-scale (contrast) output levels Flexible logic INV bit reverses polarity of video signal R/L reverses loading order of data ISW selects frame/row or column/dot inversion DSW selects single or dual data bus mode Output short-circuit protection 3.3 V logic, 11 V to 18 V analog supplies Available in 80-lead, 12 mm × 12 mm, TQFP E-pad APPLICATIONS LCD microdisplay driver FUNCTIONAL BLOCK DIAGRAM DBA(0:11) VID0 VID1 VID10 VID11 DBB(0:11) BYP TSW GSW DSW CLK XFR R/L VRL VRH ISW INV TWO-STAGE LATCH TWO-STAGE LATCH TWO-STAGE LATCH TWO-STAGE LATCH SCALING CONTROL DAC DAC DAC DAC SEQUENCE CONTROL THERMAL SWITCH BIAS G-MODE SWITCH 12 12 12 12 12 12 12 12 12 12 AD8387 Figure 1. GENERAL DESCRIPTION The AD8387 DecDriver provides dual, fast latched, 12-bit decimating input, which drives 12 high voltage outputs. Twelve- bit input words are loaded into 12 separate high speed, bipolar DACs sequentially. Flexible digital input format allows more than one AD8387 to be used in parallel for higher resolution displays. The output signal can be adjusted for dc reference, signal inversion, and contrast for maximum flexibility. The AD8387 is fabricated on ADI’s fast bipolar, 26 V XFCB process, providing fast input logic, bipolar DACs with trimmed accuracy and fast settling, high voltage, precision drive amplifiers on the same chip. The AD8387 dissipates 1.34 W nominal static power. The AD8387 is offered in an 80-lead TQFP E-pad package and operates over the commercial temperature range of 0°C to +85°C. 5 0 0 INTERNAL AMBIENT TEMPERATURE ( °C) 4 3 2 1 10 20 30 40 50 60 70 80 NORMAL PROJECTOR OPERATING TEMPERATURE RANGE CODE 4095 CODE 0 CODE 2048 Figure 2. Channel Matching vs. Temperature |
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