4.0 Applications
Bt860/861
4.1 PC Board Considerations
Multiport YCrCb to NTSC/PAL /SECAM
Figure 4-1. Typical Connection Diagram
(1)
5 V
Digital Power Plane
Analog Power Plane
C6
VDD
VDDMAX
L1
3.3 V (VCC)
C10 – C14
VAA
C5
COMP 1
COMP 2
C7 – C9
C1
C15
VBIAS 1
VBIAS 2
VREF
C2
C3
C4
Ground
GND
(Power Supply
Connector)
RSET
1
RSET
2
AGND
R
R
R
R
R
R
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
FSADJ 1
FSADJ 2
DACA
DACB
DACB
DACB
DACB
DACB
P
P
LPF
LPF/RF MOD
LPF
P
P
P
P
To Video
Connector
LPF/RF MOD
LPF
LPF
LPF
C18
RF Modulator/CVBS Out
Buffer
VAA
CVBS
P
22 pF
Schottky
Diode
P
75
RF
Modulator
DAC
Output
To
Filter
TRAP
(2)
1.8 µH
ZIN = 1 K
L2
82
C16
C17
270 pF
330 pF
Schottky
Diode
Audio
GND
NOTE(S):
(1)
This pin must be connected to 5 V if 5 V tolerance is required. If only 3.3 V tolerance is required, this pin should be
connected to VAA.
Some modulators may require AC coupling capacitors (10 µF).
(2)
3. For a typical parts list, seeTable 4-1.
861_035
4-2
Conexant
D860DSA
CONEXANT [ CONEXANT SYSTEMS, INC ]
