1
FN0561.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2002. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
CA3089
FM IF System
Description
Intersil CA3089 is a monolithic integrated circuit that pro-
vides all the functions of a comprehensive FM-IF system.
The block diagram shows the CA3089 features, which
include a three-stage FM-IF 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 delayed AGC for the RF tuner,
and AFC drive circuit, and an output signal to drive a tuning
meter and/or provide stereo switching logic. In addition, inter-
nal power supply regulators maintain a nearly constant cur-
rent drain over the voltage supply range of +8.5V to +16V.
The CA3089 is ideal for high-fidelity operation. Distortion in a
CA3089 FM-IF System is primarily a function of the phase
linearity characteristic of the outboard detector coil.
Features
.
For FM IF Amplifier Applications in High-Fidelity,
Automotive, and Communications Receivers
Includes: IF Amplifier, Quadrature Detector, AF
Preamplifier, and Specific Circuits for AGC, AFC, Muting
(Squelch), and Tuning Meter
Exceptional Limiting Sensitivity
at -3dB Point. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
V (Typ)
Low Distortion:
(with Double-Tuned Coil) . . . . . . . . . . . . . . . . . 0.1% (Typ)
Single-Coil Tuning Capability
High Recovered Audio . . . . . . . . . . . . . . . . . . 400mV (Typ)
Provides Specific Signal for Control of Interchannel Muting
(Squelch)
Provides Specific Signal for Direct Drive of a Tuning Meter
Provides Delayed AGC Voltage for RF Amplifier
Provides a Specific Circuit for Flexible AFC
Internal Supply-Voltage Regulators
Pinouts
Part Number Information
PART
NUMBER
TEMP. RANGE
(
o
C)
PACKAGE
PKG. NO.
CA3089E
-40 to 85
16 Ld PDIP
E16.3
CA3089M1
(3089M)
-40 to 85
20 Ld SOIC
M20.3
CA3089
(PDIP)
TOP VIEW
CA3089
(SOIC)
TOP VIEW
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
IF IN
INPUT BYPASS
DC FB BYPASS
FRAME GND
MUTE CONTROL
AUDIO OUT
IF OUT
AFC OUT
NC
SUBSTRATE (GND)
TUNING METER OUT
MUTE LOGIC
V+
REF BIAS
QUADRATURE INPUT
DELAYED AGC
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
GND
IF IN
INPUT BYPASS
DC FB BYPASS
FRAME GND
MUTE CONTROL
AFC OUT
AUDIO OUT
IF OUT
GND
GND
GND
SUBSTRATE (GND)
TUNING METER OUT
DELAYED AGC
MUTE LOGIC
V+
REF BIAS
QUADRATURE INPUT
NC
Data Sheet
October 2002
OBSO
LETE
PROD
UCT
NO RE
COMM
ENDE
D REP
LACE
MENT
2
Absolute Maximum Ratings
Thermal Information
Supply Voltage
Between V+ and Frame GND. . . . . . . . . . . . . . . . . . . . . . . . . .16V
Between V+ and Substrate GND . . . . . . . . . . . . . . . . . . . . . . .16V
DC Current (Out of Delayed AGC). . . . . . . . . . . . . . . . . . . . . . . 2mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40
o
C to 85
o
C
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
95
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300
o
C
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
V+ = 12V (See Figures 3 and 4)
(NOTE 3)
PARAMETER
TEST CONDITIONS
TEMP.
(
o
C)
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Quiescent Circuit Current
No signal input, Non muted
25
16
23
30
mA
DC Voltages
Terminal 1 (IF Input)
25
1.2
1.9
2.4
V
Terminal 2 (AC Return to Input)
25
1.2
1.9
2.4
V
Terminal 3 (DC Bias to Input)
25
1.2
1.9
2.4
V
Terminal 6 (Audio Output)
25
5.0
5.6
6.0
V
Terminal 10 (DC Reference)
25
5.0
5.6
6.0
V
DYNAMIC CHARACTERISTICS
Input Limiting Voltage (-3dB point), V
1
(lim)
-
f
O
= 10.7MHz,
f
MOD
= 400Hz,
Deviation =
75kHz
25
-
12
25
V
AM Rejection (Terminal 6), AMR
V
IN
= 0.1V,
AM Mod. = 30%
25
45
55
-
dB
Recovered AF Voltage (Terminal 6) V
O
(AF)
V
IN
= 0.1V
25
300
400
500
mV
Total Harmonic
Distortion, THD
(Note 2)
Single Tuned (Terminal 6)
25
-
0.5
1.0
%
Double Tuned (Terminal 6)
25
-
0.1
-
%
Signal Plus Noise to Noise Ratio (Terminal 6)
25
60
67
-
dB
NOTES:
2. THD characteristics are essentially a function of the phase characteristics of the network connected between Terminals 8, 9, and 10.
3. Terminal numbers refer to 16 Lead PDIP.
Application Information
FIGURE 1. AFC CHARACTERISTICS (CURRENT AT
TERMINAL 7) vs CHANGE IN FREQUENCY. (SEE
TEST CIRCUIT FIGURE 3)
FIGURE 2. MUTING ACTION, TUNER AGC, AND TUNING
METER OUTPUT vs INPUT SIGNAL VOLTAGE.
(SEE TEST CIRCUIT FIGURE 3)
-100
CHANGE IN FREQUENCY (kHz)
-50
0
50
100
-125
-100
-75
-50
-25
0
25
50
75
100
125
A
5k
V+ = 12V, T
A
25
o
C
10
7
CURR
ENT
IN
T
O
TE
RM
IN
AL 7
(
A)
100K
10K
1K
100
10
1
INPUT SIGNAL (
V)
RE
CO
V
E
R
E
D
A
UDI
O
(d
B)
M
U
TI
NG
CO
NT
R
O
L
A
T
M
A
XIM
U
M
RE
SIST
A
N
C
E
DC
(
V
)
0
-10
-20
-30
-40
-50
-60
6
5
4
3
2
1
V+ = 12V, T
A
= 25
o
C
RECOVERED AUDIO FROM FULL OUTPUT
(LEFT COORDINATE)
TUNER AGC DC VOLTAGE AT
TERM. 15 (RIGHT COORDINATE)
VOLTAGE AT TERMINAL 13
METER CIRCUIT (33k
TO GND)
(RIGHT COORDINATE)
CA3089
3
Test Circuits
NOTES:
4. All resistance values are in ohms.
5. L tunes with 100pF (C) at 10.7MHz.
6. Q
0
(unloaded)
75 (G.I. Automatic Mfg. Div. EX22741 or equivalent)
NOTES:
7. All resistance values are in ohms.
8. T PRI. - Q
0
(unloaded)
75 (tunes with 100pF (C
1
) 20
of 34e on
7
/
32
" dia. form).
9. SEC. - Q
0
(unloaded)
75 (tunes with 100pF (C
2
) 20
of 34e on
7
/
32
" dia. form).
10. kQ (percent of critical coupling)
70%.
(Adjusted for coil voltage V
C
) = 150mV.
Above values permit proper operation of mute (squelch) circuit
"E" type slugs, spacing 4mm.
FIGURE 3. TEST CIRCUIT FOR CA3089E USING A SINGLE-
TUNED DETECTOR COIL
FIGURE 4. TEST CIRCUIT FOR CA3089E USING A DOUBLE-
TUNED DETECTOR COIL
AUDIO
OUT
SIGNAL
INPUT
VOLTAGE
14
4
15
13
5
12
0.001
F
10
K
33K
0.001
F
0.01
F
6
FULL
SCALE
150
A
2
3
0.01
F
0.33
F
0.5M
120K
470
TUNING METER
2.7K
0.02
F
51
1
0.01
F
11
0.05
F
8
7
9
10
3.9K
100
C
L
5K
22
H
AFC OUTPUT
V+ = 12V
pF
CA3089E
(NOTE 5)
AUDIO
OUT
SIGNAL
INPUT
VOLTAGE
14
4
15
13
5
12
0.001
F
10
K
33K
0.001
F
0.01
F
6
FULL
SCALE
150
A
2
3
0.01
F
0.33
F
0.5M
120K
470
TUNING METER
2.7K
0.02
F
51
1
0.01
F
11
0.05
F
8
7
9
10
8.2K
100
C
2
T (NOTE 8)
5K
22
H
AFC OUTPUT
V+ = 12V
pF
CA3089E
C
1
100
pF
3K
Test Applications
FIGURE 5. TYPICAL FM TUNER USING THE CA3089E WITH A SINGLE TUNED DETECTOR COIL
AUDIO
OUT
0.01
F
6
3.9K
2.7K
CA3089E
2
14
4
9
8
11
10
22
H
250pF
220pF
1
3
300
INPUT
IF OUT
FM
TUNER
100
CERAMIC
FILTER
0.01
F
0.05
F
330
V+ = 12V
C
100pF
L (NOTE 14)
CA3089E
Performance Data at f
O
= 98MHz, f
MOD
= 400Hz, Deviation =
75kHz:
-3dB Limiting Sensitivity . . . . . . . . . . . . . . . . . . 2
V (Antenna Level)
20dB Quieting Sensitivity . . . . . . . . . . . . . . . . . 1
V (Antenna Level)
30dB Quieting Sensitivity . . . . . . . . . . . . . . . .1.5
V (Antenna Level)
NOTES:
11. All resistance values are in ohms.
12. Waller 4SN3FIC or equivalent.
13. Murata SFG 10.7mA or equivalent.
14. L tunes with 100pF (C) at 10.7MHz Q
0
unloaded
75
(G.I. EX22741 or equivalent).
(NOTE 13)
(NOTE 12)
CA3089
4
Block Diagram
NOTES:
15. All resistance values are in ohms.
16. L Tunes with 100pF (C) at 10.7MHz.
17. QO @ 75 (G.I. EX22741 or equivalent).
18. Pin numbers refer to 16 lead DIP.
FIGURE 6A. BOTTOM VIEW OF PRINTED CIRCUIT BOARD
FIGURE 6B. COMPONENT SIDE - TOP VIEW
FIGURE 6. ACTUAL SIZE PHOTOGRAPHS OF THE CA3089E AND OUTBOARD COMPONENTS MOUNTED ON A PRINTED-CIRCUIT BOARD
Test Applications
(Continued)
14
13
15
2
3
1
11
8
9
10
5
6
7
4
LEVEL
DETECTOR
12
LEVEL
DETECTOR
LEVEL
DETECTOR
LEVEL
DETECTOR
1
ST
IF
AMPL.
2
ND
IF
AMPL.
3
RD
IF
AMPL.
MUTE (SQUELCH)
DRIVE CIRCUIT
QUADRATURE
DETECTOR
TUNING
METER
CIRCUIT
AFC
AMPL.
AUDIO
AMPL.
AUDIO
MUTE
(SQUELCH)
CONTROL
AMPL.
V+
FRAME
SUBSTRATE
150
A
METER
33K
TUNING METER OUTPUT
TO STEREO
THRESHOLD
LOGIC CIRCUITS
10K
DELAYED
AGC FOR
RF AMPL
0.02
F
0.02
F
IF
INPUT
TO INTERNAL
REGULATORS
IF
OUT
REFERENCE
BIAS
AFC
OUTPUT
AUDIO
OUTPUT
MUTING
SENSITIVITY
0.33
F
500K
120K
470
QUADRATURE
INPUT
22
H
C =
100pF
L
IF AMPLIFIER
(NOTE 16)
CA3089
5
Schematic Diagram
A
Q
9
Q
15
R
6
2K
R
7
2K
R
10
2K
R
11
2K
C
12
1
C
11
1
C
13
1
1
13
2
3
C
14
1
C
R
18
2K
R
19
2K
R
23
2K
Q
21
Q
22
R
27
750
R
24
480
R
25
1.5K
V+
V+
V+
B
Q
3
Q
4
C
2
1
Q
8
Q
8A
Q
10
Q
11
Q
7A
Q
7
R
12A
2K
R
16A
2K
R
13A
2K
Q
1
Q
2
IF
INPUT
INPUT
BYPASSING
R
2
30K
Q
6
R
3
360
R
1
30K
C
4
0.2
R
13
2.7K
Q
12
R
14
360
R
12
2.7K
C
1
1
C
3
0.2
R
16
2.7K
Q
14
Q
14A
Q
16
Q
17
Q
18
Q
13A
Q
13
R
15
2.7K
R
15A
2K
R
21
480
R
22
1.5K
R
20
2K
Q
19
Q
20
R
28
750
15
R
50
500
Q
58
V+
V+
R
51
5K
C5
2
Q
59
R
52
400
R
53
600
R
56
600
R
61
4K
C
6
3
Q
60
Q
61
Q
62
Q
70
Q
75
Q
77
Q
76
Q
74
R
59
150
R
60
300
Q
84
TUNING
METER
AGC FOR
RF AMPL.
IF AMPLIFIER
LEVEL DETECTOR AND METER CIRCUIT
R
17
360
C
7
3
Q
63
Q
64
C
8
3
Q
69
Q
68
SEE
NEXT
PAGE
NOTE: Pin numbers refer to 16 lead PDIP.
CA3089
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