THS8200/8210
‘ALL-FORMAT’ OVERSAMPLED COMPONENT VIDEO/PC GRAPHICS D/A SYSTEM WITH
THREE 11 BIT DAC’S, CGMS DATA INSERTION AND 525P MACROVISION
TM COPY
PROTECTION
SLES032—6/18/02 3:33 PM
POST OFFICE BOX 655303
DALLAS TEXAS 77265
47
Copyright 2001 Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data
and other specifications are design goals. Texas Instruments
reserves the right to change or discontinue these products
without notice.
The figure below shows the linear DAC I/O relationship for either of both nominal full-scale settings.
SMPTE compatible RGB output with sync signal inserted on G (Green) channel
In this mode, a tri-level (HDTV modes) /bi-level (SDTV modes) sync signal is inserted into the G channel. The
nominal analog output voltage range, which is from the sync tip to the peak of active video, is from 0.0V to 1.050V.
During the active video period, the peak-to-peak AC value (dynamic range) is 700mV (from 350mV to 1050mV).
The blank levels on all three channels correspond to the bottom code "64" and are at 350mV. Below the analog
video output signals are illustrated, both the output from the G channel with a tri-level or a bi-level sync pulse
inserted, as well as the outputs from R and B channels. No sync signal is inserted during the sync period on R&B
channels.
Alternatively sync can be inserted on all three channels on ths8200 by appropriately programming the sync
amplitudes levels. On those channels where no sync is inserted, the blank levels are maintained at a 350mV DC
level.
The range of active video codes on R, G, B, channels is from 64 to 940. By definition, code 64 is corresponding to
blank level output, and code 940 is corresponding to peak analog output. Input codes outside this region can either