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THS8135-THS8135PHP-THS8135PHPG4
Triple 10-Bit 240MSPS Video DAC with Tri-Level Sync & Video (ITU-R.BT601)-Compliant Full Scale Range
THS8135
www.ti.com SLAS343B –MAY 2001–REVISED APRIL 2013
10-BIT 240-MSPS VIDEO DAC
WITH TRI-LEVEL SYNC AND VIDEO (ITU-R.BT601)-COMPLIANT FULL-SCALE RANGE
Checkfor Samples: THS8135
1FEATURES Triple 10-Bit D/A Converters • Bi-Level (EIA)or Tri-Level (SMPTE) Sync
Generation• 240-MSPS Operation Integrated Sync-On-Green/Luminanceor Sync-• YPbPr/RGB Configurable Blanking Levels,
On-All Composite Sync InsertionCorrectly Positioned for Either Full (0-1023)or
Video (ITU-R.BT601) Compliant Input Code • Internal Voltage Reference
Ranges • Low-Power Operation From 3.3-V Analog and Generic Triple DAC Mode for Non-Video 1.8-V Digital Suply Levels
Applications
APPLICATIONS• Direct Driveof Double-Terminated 75-Ω Load
Into Standard Video Levels • High-Definition Television (HDTV) Set-Top
Boxes/Receivers/Displays• 3x10 Bit 4:4:4, 2x10 Bit 4:2:2or 1x10 Bit 4:2:2
(ITU-R.BT656) Multiplexed YCbCr/GBR Input • High-Resolution Image Processing
Data Formats
DESCRIPTIONThe THS8135isa general-purpose triple high-speed D/A converter optimized for use in video/graphics
applications. The device operates from 3.3-V analog and 1.8-V digital supplies. The THS8135 performanceis
assuredata sampling rateupto 240 MSPS. The THS8135 consistsof three 10-bit D/A converters and additional
circuitry for bi-level/tri-level sync and blanking level generation. By providinga dc offset for the lowest video
amplitude outputin video DAC mode, the device can inserta (negative) bi-levelor (negative/positive) tri-level
sync on either only the green/luminance (sync-on-green/sync-on-Y) channel or on all channels for video
applications.A generic DAC mode avoids thisdc offset, making this device suitable for non-video applicationsas
well.
The THS8135isa footprint-compatible functional upgradeto the THS8133.In addition, the THS8135 allowsa
higher update rate for oversampled video digitizing for all PC graphics formats upto UXGA (1600x1200)
resolutionat 85 Hz andall practical digital TV formats including HDTV. The support for oversampling significantly
reduces the complexityof the analog reconstruction filter required behind the DAC. for the full 10-bit input code range. Alternatively, the same levels canbe input range compliantto the video sampling standard ITU-R.BT-601.In that case, theis dependent on the RGBor YCbCr color space configurationof the device. operation, full video output swingis reached for input codes 64-940 onall channels. 64-940 64-960on Cb andCr channels scaling The device provides outside the ITU-R.BT601 range generationof ITU-/ super-white levels. digital controlofa reference (blanking) level on the analog outputsfor either RGBor YPbPr component outputs andor output amplitude(s) always has the requiredto the directly terminatedin resistiveto The maximum output current drive. The devices output drivers have been video output levels when directly connectedtoa single-ended double-
