THS8134, THS8134A, THS8134B

TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER

WITH TRI-LEVEL SYNC GENERATION

SLVS205D – MAY 1999 – REVISED MARCH 2000

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POST OFFICE BOX 655303

features

Load Into Standard Video Levels

(ITU-BT.656) Multiplexed YPbPr/GBR Input

Modes

Generation With 7:3 Video/Sync Ratio

Luminance or Sync-On-All Channels

applications

Boxes/Receivers

See ALSO: THS8133 (10 bit, pin-compatible)

description

The THS8134 is a general-purpose triple high-speed D/A converter (DAC) optimized for use in video/graphics

applications. The device operates from a 5-V analog supply and a 3-V to 5-V range digital supply. The THS8134

has a sampling rate up to 80 MSPS. The device consists of three 8-bit D/A converters and additional circuitry

for bi-level/tri-level sync and blanking level generation in video applications.

THS8134 is also well-suited in applications where multiple well-matched and synchronously operating DACs

are needed; for example, I-Q modulation and direct-digital synthesis in communications equipment.

The current-steering DACs can be directly terminated in resistive loads to produce voltage outputs. The device

provides a flexible configuration of maximum output current drive. Its output drivers are specifically designed

to produce standard video output levels when directly connected to a single-ended doubly-terminated 75

Ω

coaxial cable. Full-scale video/sync is generated in a 7:3 ratio, compliant with SMPTE standards for GBR and

YPbPr signals.

Furthermore, the THS8134 can generate both a traditional bi-level sync or a tri-level sync signal, as per the

SMPTE standards, via a digital control interface. The sync signal is inserted on one of the analog output

channels (sync-on-green/luminance) or on all output channels. Also, a blanking control signal sets the outputs

to defined levels during the nonactive video window.

The position of this defined (blanking) level and the temperature range, over which the maximum imbalance

device versions. Refer to the Available Options table.

Copyright

© 2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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