Texas Instruments THS8134, THS8134A, THS8134B Specifications and User Manual

查询THS8134供应商 THS8134, THS8134A, THS8134B

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

WITH TRI-LEVEL SYNC GENERATION SLVS205D – MAY 1999 – REVISED MARCH 2000

features

TQFP-48 Power PAD PACKAGE

(TOP VIEW)

Triple 8-Bit D/A Converters Minimum 80 MSPS Operation Direct Drive of Doubly-Terminated 75-Ω Load Into Standard Video Levels 3×8 Bit 4:4:4, 2×8 Bit 4:2:2 or 1×8 Bit 4:2:2

(ITU-BT.656) Multiplexed YPb Pr/GBR Input BPb7 NC

Modes BPb6 NC

BPb5 GY0

Bi-Level (EIA) or Tri-Level (SMPTE) Sync

Generation With 7:3 Video/Sync Ratio BPb4 GY1 BPb3 GY2

Integrated Insertion of Sync-On-Green/

BPb2 GY3

Luminance or Sync-On-All Channels

BPb1 GY4

Configurable Blanking Level

BPb0 GY5

Internal Voltage Reference

NC GY6 NC GY7

applications

DVSS CLK High-Definition Television (HDTV) Set-Top DVDD SYNC_T

Boxes/Receivers High-Resolution Image Processing Desktop Publishing Direct Digital Synthesis/I-Q Modulation

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 YPb Pr 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 between the inserted analog syncs (KIMBAL(SYNC)), are the only differences between the unrev, rev A, and rev B device versions. Refer to the Available Options table.

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.

Power PAD is a trademark of Texas Instruments.

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.

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