Diodes ZNBG3118 - Manual (Page 7)

ZNBG3118
ZNBG3118
Document number: DS32049 Rev. 2 - 2
7 of 10
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February 2010
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Figure 4 Applications circuit for the ZNBG3118 using logic controlled PLL local oscillators at 3.3V
Functional Tables
ZNBG3118 System Function
Inputs Outputs
Vin (V) Fin (kHz) FET 1 FET 2 FET 3 LB
(1)
HB
(1)
<14.0 0 Disabled Active Active Active Disabled
>15.5 0 Active Disabled Active Active Disabled
<14.0 22 Disabled Active Active Disabled Active
>15.5 22 Active Disabled Active Disabled Active
Note 1: See LO description above and the table below for explanation of Active and Disabled.
Tone Detection Function
Lov Fin (kHz) LB HB LB HB
Gnd
0 Enabled Disabled Gnd -2.5V
22 Disabled Enabled -2.5V Gnd
Vosc
0 Enabled Disabled Vosc Note (2)
22 Disabled Enabled Note
(2)
Vosc
Vcc
0 Enabled Disabled Vcc – 0.1V Note
(2)
22 Disabled Enabled Note
(2)
Vcc – 0.1V
Note 2: 0 Volts in a typical LNB application but dependant on the external circuits
Vcc
CNB 47nF
CSUB 47nF
LNB Downf eed
RPOL
10k
CFIN
330pF
Gnd
ZNBG3118
Cs
u
b
Cnb1
Cnb2
Rc
a
l
G2 D3 G3 D1
2
LB G1
HB
Fi
n
Vpol
Vcc
Lov
RCAL 39k
RHB
HB
Local
Osc.
PLL