SL1461SA
Wideband PLL FM Demodulator
Advance Information
DS4049 - 1.2 December 1994
The SL1461SA is a wideband PLL FM demodulator,
intended primarily for application in satellite tuners.
The device contains all elements necessary, with the
exception of external oscillator sustaining network and loop
feedback components, to form a complete PLL system
operating at frequencies up to 800MHz.
An AFC with window adjust is provided, whose output
signal can be used to correct for any frequency drift at the head
end local oscillator.
AFC PUMP
AFC WINDOW ADJUST
V
EE
OSCILLATOR +
OSCILLATOR –
AGC BIAS
AGC OUTPUT
RF INPUT
1
2
3
4
5
6
7
8
16
15
AFC OUTPUT
V
CC
VIDEO FEEDBACK +
VIDEO –
VIDEO +
VIDEO FEEDBACK –
VIDEO OUTPUT
RF INPUT
SL1461SA
14
13
12
11
10
9
FEATURES
s
Single chip PLL system for wideband FM
demodulation
s
Simple low component count application
s
Allows for application of threshold extension
s
Fully balanced low radiation design
s
High operating input sensivity
s
Improved VCO stability with variations in supply or
temperature
s
AGC detect and bias adjust
s
75Ω video output drive with low distortion levels
s
Dynamic self biasing analog AFC
s
Full ESD Protection*
* Normal ESD handling procedures should be observed
MP16
Fig.1 Pin connections - top view
APPLICATIONS
s
Satellite receiver systems
s
Data communications Systems
ORDERING INFORMATION
SL1461SA/KG/MPAS
AGC BIAS
RF INPUTS
AGC OUTPUT
6
8
9
7
14
12
13
11
VIDEO
FEEDBACK +
VIDEO +
VIDEO –
VIDEO
FEEDBACK –
VIDEO
OUTPUT
AFC PUMP
AFC OUTPUT
10
1
LOCAL
OSCILLATOR
AFC WINDOW
ADJUST
4
5
16
2
Fig.2 SL1461SA block diagram
MITEL [ MITEL NETWORKS CORPORATION ]
