P
May 1999
T
UCT
ROD RODUC
EP
LET
TE P
BSO BSTITU
O
SU
9E
IBLE CA308
OSS
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-
鏗乪r,
quadrat
ure
detec-
tor,
tuning
meter
out-
put,
lim-
iter,
AFC
circuit,
AGC
cir-
cuit,
mut-
ing cir-
cuit,
indus-
trial
tem-
pera-
Features
鈥?Includes IF Ampli鏗乪r, Quadrature Detector, AF
Preampli鏗乪r, and Speci鏗乧 Circuits for AGC, AFC, Tun-
ing Meter, Deviation-Noise Muting, and ON Channel
Detector
鈥?FM IF Ampli鏗乪r Applications in High-Fidelity,
Automotive, and Communications Receivers
鈥?Exceptional Limiting Sensitivity -12碌V (Typ) at -3dB
Point
鈥?Low Distortion -0.1% (Typ) (with Double-Tuned Coil)
鈥?Single-Coil Tuning Capability
鈥?Improved S + N/N Ratio
鈥?Externally Programmable Recovered Audio Level
鈥?Provides Speci鏗乧 Signal for Control of Interchannel
Muting (Squelch)
鈥?Provides Speci鏗乧 Signal for Direct Drive of a Tuning
Meter
鈥?On Channel Step for Search Control
鈥?Provides Programmable AGC Voltage for RF Ampli鏗乪r
鈥?Provides a Speci鏗乧 Circuit for Flexible Audio Output
鈥?Internal Supply Voltage Regulators
鈥?Externally Programmable 鈥淥n鈥?Channel Step Width,
and Deviation at Which Muting Occurs
Description
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 ampli鏗乪r/limiter con鏗乬uration with level detectors for
each stage, a doubly-balanced quadrature FM detector and
an audio ampli鏗乪r 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-鏗乨elity 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 (
o
C)
-40 to 85
PACKAGE
16 Ld PDIP
PKG.
NO.
E16.3
Pinout
CA3189
(PDIP)
TOP VIEW
IF IN 1
INPUT
BYPASS
2
3
16
15
DELAYED AGC
14 SUBSTRATE (GND)
13 TUNING
METER OUT
12 MUTE LOGIC
11 V+
10 REF BIAS
9
QUADRATURE
INPUT
FRAME 4
MUTE CONTROL 5
AUDIO OUT 6
AFC OUT 7
IF OUT 8
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
1-800-4-HARRIS or 407-727-9207
|
Copyright
漏
Harris Corporation 1999
File Number
1046.4
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