TMS320DM6437
Digital Media Processor
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SPRS345B–NOVEMBER 2006–REVISED MARCH 2007
The DM6437's analog video DAC outputs are designed to drive a 500-Ω load. Figure 6-27 describes a
typical circuit that will permit connecting the analog video output from the DM6437 device to standard
75-Ω impedance video systems. Another solution is to use a Video Amplifier, such as the Texas
Instruments' OPA361, which provides a complete solution to the typical output circuit shown in
Figure 6-27.
3.3 V
Low-Pass Filter
fc = 6.5 MHz
+
75 Ω
IOUT
DAC
−
~RLOAD = 500 Ω
V
O
75 Ω
R2 = 1.12 kΩ
R1 = 267 Ω
æ
ö
R2
÷
R1ø
ç
÷
´I
V
= 1+
´R
OUT LOAD
ç
÷
O
ç
è
Figure 6-27. Typical Output Circuit for NTSC/PAL Video From DACs
236
Peripheral Information and Electrical Specifications
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