znbg3118 Diodes, Inc., znbg3118 Datasheet - Page 7

• Manufacturer Part Number: znbg3118
• Description: Lna Gaas Fet Bias Controller With Polarization And Band Select
• Manufacturer: Diodes, Inc.

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