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CA3189 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer CA3189
Beschreibung FM IF System
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 8 Seiten
CA3189 Datasheet, Funktion
www.DataSheet4U.com
May 1999
POSSOIBBLSEOSLUECBTASE3T0PIT8RU9OETDEUPCRTODUCT
CA3189
FM IF System
[ /Title
(CA31
89)
/Sub-
ject
(FM
IF Sys-
tem)
/Autho
r ()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
FM IF
ampli-
fier,
quadrat
ure
detec-
tor,
tuning
meter
out-
put,
lim-
iter,
AFC
circuit,
AGC
cir-
cuit,
mut-
ing cir-
cuit,
indus-
trial
tem-
pera-
Features
Description
• Includes IF Amplifier, Quadrature Detector, AF
Preamplifier, and Specific Circuits for AGC, AFC, Tun-
ing Meter, Deviation-Noise Muting, and ON Channel
Detector
• FM IF Amplifier Applications in High-Fidelity,
Automotive, and Communications Receivers
• Exceptional Limiting Sensitivity -12µV (Typ) at -3dB
Point
• Low Distortion -0.1% (Typ) (with Double-Tuned Coil)
• Single-Coil Tuning Capability
• Improved S + N/N Ratio
• Externally Programmable Recovered Audio Level
• Provides Specific Signal for Control of Interchannel
Muting (Squelch)
• Provides Specific Signal for Direct Drive of a Tuning
Meter
• On Channel Step for Search Control
• Provides Programmable AGC Voltage for RF Amplifier
• Provides a Specific Circuit for Flexible Audio Output
• Internal Supply Voltage Regulators
• Externally Programmable “On” Channel Step Width,
and Deviation at Which Muting Occurs
The Harris CA3189E is a monolithic integrated circuit that
provides all the functions of a comprehensive FM-lF system.
The block diagram of the CA3189E includes a three-stage
FM-lF amplifier/limiter configuration with level detectors for
each stage, a doubly-balanced quadrature FM detector and
an audio amplifier that features the optional use of a muting
(squelch) circuit.
The advanced circuit design of the IF system includes desir-
able deluxe features such as programmable delayed AGC
for the RF tuner, an AFC drive circuit, and an output signal to
drive a tuning meter and/or provide stereo switching logic. In
addition, internal power-supply regulators maintain a nearly
constant current drain over the voltage supply range of
+8.5V to +16V.
The CA3189E is ideal for high-fidelity operation. Distortion in
a CA3189E FM-lF System is primarily a function of the
phase linearity characteristic of the outboard detector coil.
The CA3189E has all the features of the CA3089E plus addi-
tions. See CA3189E features compared to the CA3089E in
Table 1.
Part Number Information
PART NUMBER
CA3189E
TEMP.
RANGE (oC)
PACKAGE
-40 to 85 16 Ld PDIP
PKG.
NO.
E16.3
Pinout
CA3189
(PDIP)
TOP VIEW
IF IN 1
INPUT
BYPASS
2
3
FRAME 4
MUTE CONTROL 5
AUDIO OUT 6
AFC OUT 7
IF OUT 8
16
DELAYED AGC
15
14 SUBSTRATE (GND)
13
TUNING
METER OUT
12 MUTE LOGIC
11 V+
10 REF BIAS
9
QUADRATURE
INPUT
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
1-800-4-HARRIS or 407-727-9207 | Copyright © Harris Corporation 1999
1
File Number 1046.4






CA3189 Datasheet, Funktion
CA3189
Schematic Diagrams (Continued)
www.DataSheet4U.com
A
9
QUADRATURE
INPUT
DETECTOR
R33
500
B Q23
Q24Q25
CA3189E
REF
BIAS
10
8
IF
OUT
R32
500
Q35
Q32Q33
R31
390
R37 R38
600 400
Q44 Q46
Q45
D6
Q50
Q50A
R26
10K
Q26
R34
10K
Q34
Q38 Q39
D2 D3
C
R35
2.2K
Q40
Q27 Q41
R29 R36
200 200
R63
425
Q48 Q48A
V+
Q79
R65
3.9K
Q81
Q82
R64
425
V+
Q80
R67
10.1K
R40
1K
R66
550
AUDIO
AMPL.
R44 R42
400 600
Q53 Q51
Q54
Q49AQ49
Q83
R41
1K
6
R9
9.6K
Q28 V+
Z1
C
B
Q5
A
R8
1.9
Q29
K R30
Q30
D4
R45
500
Q31 Q43
R5
3.8K
533 D5
R55
D Z2 17K
D1
R90 5K
5
Q90
R74 R73
1K 1K
Q94 Q96
Q100
Q95 R76
1K
Q102
Q101
Q103 R39
400
R43
400
Q47 Q52
7
Q56
R4
R89 700
10
E
Q65
Q66
Q67
BIAS
SUPPLY
R70
6.96
K
R77
1K
Q97
V+
Q98
C9 R57
Q71
10
Q72
11.8K
C15
Q78
V+
F Q73 10
C10
34
R54
3K
R58
50
Z3
Q91
R71
1K
Q104
Q92 Q93 Q99
R72 R73
R78
1K 1K 1.08K
R79
1.08K
Q55
R47
667
Q57
R48
667
MUTE DRIVE
12
DEVIATION MUTE DETECTOR
AND AFC AMPLIFIER
6

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