zlnb2004 Zetex Semiconductors plc., zlnb2004 Datasheet - Page 7

• Manufacturer Part Number: zlnb2004
• Description: Zlnb2004 - Dual Tone And Polarity Switch Lnb Multiplex Controller
• Manufacturer: Zetex Semiconductors plc.

APPLICATION CIRCUIT EXAMPLES
The following circuit shows the additional components that will be used for polarisation mode
and 22kHz tone detection in a typical ZLNB2001/2 application.
The following circuit shows the additional components that will be used for polarisation mode
and 22kHz tone detection in a typical ZLNB2003/4 application.
LNB Downfeed
No.2
LNB Downfeed
No.2
ZLNB2001 ZLNB2002
ZLNB2003 ZLNB2004
470pF
470pF
68pF
R3
10k
68pF
R3
10k
R4
150k
R4
150k
C4
C4
C3
C3
R6
1M
C6
100nF
C
G
F
F
G
F
F
V
V
ZLNB2001
ZLNB2003
OUT2
IN2
REC2
OUT2
IN2
POL2
POL2
ND
ND
C5
100nF
V
F
F
V
V
F
F
V
C
OUT1
IN1
OUT1
IN1
CC
POL1
CC
POL1
REC1
88
R5
1M
R2
150k
R2
150k
C1
C1
C2
C2
68pF
470pF
68pF
470pF
LNB Downfeed
No.1
LNB Downfeed
No.1
R1
10k
R1
10k
V
V
CC
CC