DEVICE DESCRIPTION
The ZLNB2006/09/10 group of dual polarisation and
tone switch controller are part of a wide range of
satellite receiver LNB support circuits available from
Zetex. Each part features two completely independent
channels, each providing logic outputs to control LNB
polarisation selection, local oscillator selection and the
ZLNB2009/10 also provides downfeed disable. They
are intended for use in Twin Universal and Quad LNBs,
replacing many discrete components to save both
manufacturing cost and PCB size whilst improving
reliability.
T h e t w o p o l a r i s a t i o n c o n t r o l i n p u t s o f t h e
ZLNB2006/09/10 have a nominal threshold of 14.75V.
The threshold is temperature compensated to
minimise drift. Each features a low and stable input
current that enables transient protection to be
achieved with the addition of only a single resistor per
channel.
Multi Feed LNBs can be called to operate with one or
m o r e o f t h e i r c o n t r o l l i n g r e c e i v e r s p o w e r e d
down/disconnected, with attendant cable mismatch
problems. To ease design for this situation, each
polarisation input of the ZLNB2009/10 has a second
threshold set at 9.5V. An input voltage below this
threshold indicates "receiver not present", switching
the relevant control channels high. This logic output
can be used to disable the associated downfeed driver,
eliminating any problems due to cable mismatch.
FEATURES
Dual polarisation switch
Temperature compensated polarisation switch
threshold
Transient resistant inputs
Includes Receiver-Off detector (ZLNB2009/10)
Dual tone switch
User adjustable filter centre frequency and
bandwidth
User adjustable tone switching delays
Tone and Pol outputs are TTL, CMOS, Pin diode
and IF amp capable
Universal LNB local oscillator selection is achieved by
detection of a low level AC voltage superimposed on
the polarisation control voltage. To facilitate this
function, the ZLNB2006/09/10 includes a separate tone
detector for each channel. Full control of detector
bandwidth and sensitivity is provided using two
external resistors and capacitors. In the ZLNB2006/9,
additional control of tone switch delays is provided to
assist with the rejection of low frequency control
signals intended for other systems.
Polarisation switch and tone detector outputs can
source and sink 10mA making them suitable to drive
TTL and CMOS logic, pin diodes and IF-amp supply
switching.
The ZLNB2006/09/10 operates from a single supply
which can be anything from 5-10V. Their quiescent
current is typically only 6mA and this does not change
significantly with load or logic state. They are available
in the space saving QSOP16 or QSOP20 surface mount
package.
Wide supply operating range
Low quiescent current
Few external components
Eliminates many discrete components
APPLICATIONS
Twin Universal LNB
Multi Feed Universal Lnb's
Twin Universal IF switch boxes
LNB switch boxes
ISSUE 1 - APRIL 2002
DUAL TONE AND POLARITY SWITCH
LNB MULTIPLEX CONTROLLER
ZLNB2006
ZLNB2009
ZLNB2010
1
ZLNB2006
ZLNB2009
ZLNB2010
ISSUE 1 - APRIL 2002
2
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
-0.6V to 12V
Supply Current
100mA
V
POL1
and V
POL2
Input Voltage
25V Continous
Operating Temperature
-40 to 85C
Storage Temperature
-40 to 125C
Power Dissipation (T
amb 25 C)
QSOP16
500mW
QSOP20
500mW
SYMBOL PARAMETER
CONDITIONS
LIMITS
UNITS
Min
Typ
Max
V
CC
Supply Voltage
5
10
V
I
CC
Supply Current
IHV
OUT1,2
=IT
OUT1,2
=0
IT
OUT1,2
=0,IHV
OUT1,2
=10mA,
V
POL
=15.5V
5.5
26
12
32
mA
mA
V
POL1
and V
POL2
Inputs
I
POL
V
TPOL
V
TEN
T
SPOL
Current
Threshold Voltage
Enable Threshold Voltage
(ZLNB2009/10 only)
Switching Speed
V
POL1
= V
POL2
= 25V (Note 2)
T
amb
=-40C to 70C (Note 2)
T
amb
=-40C to 70C (Note 2)
10
14.0
8.0
25
14.75
9.5
40
15.5
10.0
100
A
V
V
S
Filter Amplifier
I
B
Input Bias Current
RF1=150k
0.02
0.07
0.25
A
V
OUT
V
OUT
(Note 1) (ZLNB2006 only)
RF1=150k
1.75
1.95
2.15
V
V
OUT
V
OUT
(Note 1) (ZLNB2009/10 only) RF1=150k
2.215
V
I
OUT
I
OUT
(Note 1) (ZLNB2006 only)
V
OUT
= 2.20V, V
FIN
= 2.42V
440
587
733
A
I
OUT
I
OUT
(Note 1) (ZLNB2000/10 only)
V
OUT
= 2.20V, V
FIN
= 2.50V
470
587
782
A
G
V
Voltage Gain
F=22kHz, Vin=1mV
0
46
dB
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):
T
amb
=
25 C,V
CC
=5V
Note:-
1) The parameters Filter Amplifier V
OUT
, I
OUT
, Rectifier V
OUT
and Comparator Threshold Voltage are all directly (linearly)
related to Vcc.
2) Applied via 10k resistors
ISSUE 1 - APRIL 2002
ZLNB2006
ZLNB2009
ZLNB2010
3
SYMBOL PARAMETER
CONDITIONS
LIMITS
UNITS
Min
Typ
Max
Rectifier (ZLNB2006 and ZLNB2009 ONLY)
V
REC
VOUT (Note 1)
ILeakage
RF1=150k, IL=10
A
RF1=150k, VOUT=3V (Note 1)
2.2
2.45
20
2.69
200
V
nA
Comparator (ZLNB2009 and ZLNB2010 ONLY)
2.980
V
V
TH
DC
Threshold DC
(Note 1)
F=0
V
TH
Threshold AC
Test Circuit 1 (ZLNB2010)
Test Circuit 2 (ZLNB2009)
100
150
300
mV
Comparator (ZLNB2006 ONLY)
V
TH
DC
V
TH
AC
Threshold DC
(Note 1)
Threshold AC
F=0
Test Circuit 2
3.00
100
3.34
150
3.67
300
V
mV
Y
VH
Y
VH
Y
VL
Y Outputs
Voltage High
Voltage High
Voltage Low
I
TOUT
1,2 = -10 A
I
TOUT
1,2 = -5 A
I
TOUT
1,2 = -5mA
V
CC
-0.3
V
CC
-1.2
0
V
CC
-0.17
V
CC
-0.95
0.29
V
CC
V
CC
0.5
V
V
V
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):
T
amb
=
25 C,V
CC
=5V
Note:-
1) The parameters Filter Amplifier VOUT, IOUT, Rectifier VOUT and Comparator Threshold Voltage are all directly
(linearly) related to Vcc.
2) Applied via 10k resistors
ZLNB2006
ZLNB2009
ZLNB2010
ISSUE 1 - APRIL 2002
4
R2
150k
C2
68pF
C1
470pF
R1
10k
R4
150k
C4
68pF
C3
470pF
R3
10k
V2
(See Note 1)
Note 1: V2 Characteristics
Type:- AC source
Frequency:- 22kHz
Voltage:- 300mVp/p Enabled
100mVp/p Disabled
V1
5V
Y22
Y01
Y02
Vcc
Fout2
Y11
Y12
Y31
Gnd
Fin1
Fout1
Vpol2
Vpol1
Y21
Y32
1
Fin2
Z
LN
B
2010
TEST CIRCUIT 1
R2
150k
C2
68pF
C1
470pF
R1
10k
R4
150k
C4
68pF
C3
470pF
R3
10k
V2
(See Note 1)
Note 1: V2 Characteristics
Type:- AC source
Frequency:- 22kHz
Voltage:- 300mVp/p Enabled
100mVp/p Disabled
V1
5V
NC
CR2
CR1
NC
Y11
Y12
Y31
Gnd
Fin1
Fout1
Vpol1
Y32
Y22
Y01
Y02
Vcc
Fout2
Vpol2
Y21
Fin2
R6
1M
C6
100nF
C5
100nF
R5
1M
ZLNB2006
ZLNB2009
TEST CIRCUIT 2
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