THS8134_14 Datasheet, PDF (19/26 Pages) Texas Instruments – TRIPLE 8-BIT, 80 MSPS VIDEO D/A CONVERTER

THS8134, THS8134A, THS8134B
TRIPLE 8ĆBIT, 80 MSPS VIDEO D/A CONVERTER
WITH TRIĆLEVEL SYNC GENERATION
SLVS205D − MAY 1999 − REVISED MARCH 2000
APPLICATION INFORMATION
SMPTE 274M (continued)
+300
Vertical
Sync
0
Blanking
−300
OH
+350
+300
Broad Pulse
P’B, P’r
0
−300
−350
+700
+300
Y’,R’,G’,B’
0
−300
OH
Figure 14. SMPTE 274M Analog Interface Horizontal Timing Details^†
† _{This figure is for illustration purposes only. Consult the latest SMPTE 274M standard when designing a compliant system.}
For GBR operation, Table 9 lists the THS8134 full-scale output currents that produce compliant signals to the
standard after proper termination. These amplitudes are valid also in YPbPr mode for the Y channel. For GBR
operation, the device needs to be configured with INS3_INT high, corresponding to the GBR with sync-on-all
operation mode of Table 1.
Table 9. THS8134 Signals for SMPTE 274M Compliant Operation on GBR and Y Channels
LEVEL
White
Video
Sync Pos
Black
Blank
Sync Neg
GBRY
(mA)
(V)
26.67
1.000
Video+8.00 Video+0.3
16.00
0.600
8.00
0.3000
8.00
0.3000
0
0
SYNC
1
1
0
1
1
0
SYNC_T
X
X
1
X
X
0
BLANK
1
1
X
1
0
X
DAC INPUT
FFh
Data
xxh
00h
xxh
xxh
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