Digital Media System-on-Chip (DMSoC) Product Preview

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PRODUCT PREVIEW
DIN<9:0>
MSB
LSB
DACDigitalInput
ExampleforExternalCircuit
Iout[mA]
1.4mA
0
DACOutputCurrent
C
BG
0.1 Fm
VREF
V
ideoDAC
R
BIAS
2550W
IBIAS
RLOAD
499W
IOUT
Buffer
VFB TVOUT
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463A – SEPTEMBER 2007 – REVISED SEPTEMBER 2007
A. Connect IOUT to a high-impedance video buffer device.
B. Place capacitors and resistors as close as possible to the DM355.
C. Configure the VDAC_CONFIG register in the system control module as follows: DINV = 0, PWD_GBZ = 1,
PWD_VBUFZ = 0, ACCUP_EN = X. See theTMS320DM355 ARM Subsystem Reference Guide and the
TMS320DM355 DMSoC Video Processing Back End (VPBE) User’s Guide for more information on VDAC_CONFIG.
Figure 5-31. DAC Only Application Example
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