SL1466 Просмотр технического описания (PDF) - Zarlink Semiconductor Inc
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SL1466 Datasheet PDF : 18 Pages
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SL1466
Wideband PLL FM Demodulator
Preliminary Information
DS 3979 2.2 August 1997
The SL1466 is a wideband PLL FM demodulator, intended
primarily for application in satellite tuners.
The device contains all elements necessary, with the
exception of external local oscillator tank and loop filter
components, to form a complete PLL system operating at 403
or 480MHz.
An AFC system is provided, whose output signals can be
used to correct for any frequency drift at the head end local
oscillator.
FEATURES
I Single chip PLL system for wideband FM
demodulation
I Simple low component count application
I Fully balanced low radiation design
I High operating input sensitivity
I 2 stage AGC detect for control over internal and
external AGC stages
I Low distortion video output drive
I Video polarity invert
I Digital AFC with window adjust
I ESD protection (Normal ESD handling procedures
should be observed)
GND
1
DIGF LO
2
DIGF HI
3
AFC SET
4
AFC WINDOW
5
OSC VCC
6
OSC +
7
OSC –
8
OSC GND
9
VCO GAIN SET
10
VIDEO DRIVE
11
VIDEO POL SELECT
12
NC
13
NC
14
28
V CC
27
VIDEO FB+
26
VIDEO +
25
VIDEO –
24
VIDEO FB–
23
IF V CC
22
IF IPB
21
IF IP
20
IF GND
19
RF AGC SET
18
AGC TIME CONSTANT
17
IF AGC SET
16
NC
15
RF AGC CONTROL
QP28
Fig.1 Pin connections - top view
APPLICATIONS
I Satellite receiver systems
I Data communications systems
ORDERING INFORMATION
SL1466/KG/QP1S
IF IP
21
22
IF IPB
AGC
AMP
PHASE
DETECTOR
27 VIDEO FB+
26
VIDEO +
25
VIDEO –
24
VIDEO FB–
16
NC
AGC
DETECT
REF
ON CHIP
VCO
S/H
AFC
11
VIDEO DRIVE
12 VIDEO
POLARITY
SELECT
4
AFC SET
13
NC
15
RF AGC CONTROL
28 1
Vcc GND
14
NC
19
18
17
RF AGC
SET
AGC TIME IF
CONST AGC
SET
78
LO
TANK
Fig. 2 Block diagram
10
VCO
GAIN SET
5
AFC WINDOW
2
DIGF LO
3
DIGF HI
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