THS8200-EP Datasheet, PDF (54/104 Pages) Texas Instruments – All-Format Oversampled Component Video/PC Graphics D/A System With Three 11-Bit DACs, CGMS Data Insertion

THS8200-EP
SLES253 – DECEMBER 2009
www.ti.com
4.8.1 RGB Output Without Sync Signal Insertion/General-Purpose Application DAC
In this mode, no sync signal is inserted on any of the analog outputs. HS_OUT and VS_OUT signals are
generated for output video synchronization. This mode is commonly used in computer graphics video
output.
Two levels of full-scale output can be selected by software. For video applications, the nominal voltage
levels are 0.7 V and 1.305 V.
For component video applications, the nominal voltage level is 0.7 V; 1.305 V is used in NTSC/PAL
composite video display. For composite video applications, the digital video stream must be encoded in an
external digital NTSC/PAL encoder. The THS8200 only converts the digital composite signal to analog
composite video.Figure 4-39 illustrates analog outputs without sync insertion.
When the THS8200 is programmed in this mode, it can also be used as a general-purpose DAC due to
the linear response to the DAC input codes. Optionally, the CSM block can be bypassed to avoid any
processing on the device input codes.
0.700 V/1.305 V
1023
0.000 V/0.000 V
0
Figure 4-39. RGB Without Sync Insertion or Composite Video Output
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Detailed Functional Description
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