THS8134, THS8134A, THS8134B
TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER
WITH TRI-LEVEL SYNC GENERATION
SLVS205D – MAY 1999 – REVISED MARCH 2000
features
D
D
D
D
D
D
D
D
D
48 47 46 45 44 43 42 41 40 39 38 37
M2
M1
AVSS
ABPb
AVDD
ARPr
AVSS
AGY
AVDD
COMP
FSADJ
VREF
BPb7
BPb6
BPb5
BPb4
BPb3
BPb2
BPb1
BPb0
NC
NC
DV
SS
DV
DD
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
36
35
34
33
32
31
30
29
28
27
26
25
D
D
D
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 YPbPr/GBR Input
Modes
Bi-Level (EIA) or Tri-Level (SMPTE) Sync
Generation With 7:3 Video/Sync Ratio
Integrated Insertion of Sync-On-Green/
Luminance or Sync-On-All Channels
Configurable Blanking Level
Internal Voltage Reference
TQFP-48 PowerPAD™ PACKAGE
(TOP VIEW)
applications
High-Definition Television (HDTV) Set-Top
Boxes/Receivers
High-Resolution Image Processing
Desktop Publishing
Direct Digital Synthesis/I-Q Modulation
NC
NC
GY0
GY1
GY2
GY3
GY4
GY5
GY6
GY7
CLK
SYNC_T
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
between the inserted analog syncs (K
IMBAL(SYNC)
), are the only differences between the unrev, revA, and revB
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.
PowerPAD is a trademark of Texas Instruments.
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.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
NC
NC
RPr0
RPr1
RPr2
RPr3
RPr4
RPr5
RPr6
RPr7
BLANK
SYNC
Copyright
©
2000, Texas Instruments Incorporated
1
TI [ TEXAS INSTRUMENTS ]
