ADVANCE INFORMATION
2042-2·1
SL1451
WIDEBAND PLL FM DETECTOR FOR SATELLITE TV
The SL1451 is a phase locked loop demodulator for use in
wideband FM systems. It is intended for use with an IF input
frequency from 300MHz to 700MHz in satellite receivers. It
consists of an input RF amplifier, signal level detector, UHF phase
detector UHF oscillator and video/loop amplifier. Both positive
and negative going video outputs are available.
LOOP FEEDBACK 1
0V
OSCILLATOR EMITTER
1
2
3
4
5
6
7
8
16
15
14
13
LOOP FEEDBACK 2
VIDEO OUTPUT
VIDEO OUTPUT
V
CC
RF IN
RF IN
RF AMP GAIN CONTROL
AGC OUTPUT
FEATURES
I
Complete PLL System for Wideband FM Demodulator
I
Noise Threshold Performance: 8dB (Typ.)
I
Low External Component Count
I
Positive and Negative going Video Output
I
Demodulates FM Signals with up to 28MHz p-p
Deviation
APPLICATIONS
OSCILLATOR BASE
OSCILLATOR V
CC
PHASE DETECTOR IN
PHASE DETECTOR IN
0V
SL1451
12
11
10
9
DP16
Fig. 1 Pin connections - top view
I
DBS Receivers
I
Wideband Data Communications Demodulation
ORDERING INFORMATION
SL1451 NA DP
(16-lead plastic DIL package)
ABSOLUTE MAXIMUM RATINGS
Operating temperature range
Supply voltage, V
CC
Storage temperature
Junction temperature
210°C
to180°C
11V
255°C
to
1150°C
1175°C
RF GAIN
CONTROL
10
AGC PHASE DETECTOR INPUTS
OUTPUT
INPUT INPUT
9
6
7
LOOP FEEDBACK
INPUT 1
1
V
CC
13
680
RF INPUT
RF INPUT
12
11
570
PHASE
DETECTOR
RF AMPLIFIER
570
VIDEO AMPLIFIER
680
16
2
14
15
VIDEO OUTPUT
VIDEO OUTPUT
OSC V
C
5
3·3k
2·2k
8
OSC BASE
OSC EMITTER
4
3
OSCILLATOR
TRANSISTOR
LOOP FEEDBACK
INPUT 2
V
EE
1 V
EE
2
4·9k
820
V
EE
2
Fig. 2 Block diagram
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
