cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 103

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Figure 1-37. Filterless DAC Outputs for VGA (RGB)—DAC Output Operation
100381B
NOTE(S):
Make sure to have only one of the paired outputs plugged in simultaneously.
CX25870/871
In VGA Output Mode
DACC
DACA
DACB
68
70
72
mode circumvent the three capacitors and one inductor found in the DAC
low-pass filters used for standard definition TV outputs.
one method of bypassing the capacitors and inductor. Note that an additional
RCA (or other type) of connector is recommended in this case for the Red. Green,
and Blue VGA Outputs.
Finally, Conexant recommends that any designer utilizing the CX25870 in this
DAC B
DAC C
Conexant
5443R10-0041
5443R10-0041
5443R10-0041
3.3 V
3.3 V
3.3 V
VAA
VAA
VAA
BAT54S
BAT54S
BAT54S
SOT-23
SOT-23
SOT-23
D6
D6
D6
R1
75.0 "
0805
5%
R2
75.0 "
0805
5%
R7
75.0 "
0805
5%
DAC A
DAC B
DAC B
C9
270 pF
0805
5%
C13
270 pF
0805
5%
C16
270 pF
0805
5%
22 pF
22 pF
22 pF
0805
0805
0805
C12
C15
5%
5%
5%
C8
1.8 µH
1.8 µH
1.8 µH
1210
1210
1210
5%
5%
5%
L1
L3
L2
1.0 Functional Description
Figure 1-37
C10
330 pF
0805
5%
C14
330 pF
0805
5%
C17
330 pF
0805
5%
AOUT
BOUT
COUT
C = Chroma
1.3 Device Description
CVBS =
Composite
Y = Luma
2
2
2
illustrates
VGA R
Output
VGA G
Output
VGA B
Output
2
2
2
100381_083
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