Intersil Corporation CA3089 Datasheet

CA3089

November 1996

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 T uning Meter

• Exceptional Limiting Sensitivity

at -3dB Point. . . . . . . . . . . . . . . . . . . . . . . . . . 12µV (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

FM IF System

Description

Intersil CA3089 is a monolithic integrated circuit that pro­vides 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 desir­able 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, inter­nal power supply regulators maintain a nearly constant cur­rent drain over the v oltage supply r ange 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.

Ordering Information

PART NUMBER

(BRAND)

CA3089E -40 to 85 16 Ld PDIP E16.3
CA3089M1

(3089M)

TEMP.

RANGE (oC) PACKAGE

-40 to 85 20 Ld SOIC M20.3

PKG.

Pinout

CA3089

(PDIP)

TOP VIEW

16

IF IN
INPUT BYPASS
DC FB BYPASS

FRAME GND

MUTE CONTROL

AUDIO OUT

AFC OUT

IF OUT

1
2
3
4
5
6
7
8

NC

15

DELAYED AGC

14

SUBSTRATE (GND)

13

TUNING METER OUT

12

MUTE LOGIC
V+

11
10

REF BIAS

9

QUADRATURE INPUT

NO.

GND

IF IN
INPUT BYPASS
DC FB BYPASS

FRAME GND

MUTE CONTROL

AUDIO OUT

AFC OUT

IF OUT

GND

1
2
3
4
5
6
7
8
9

10

CA3089

(SOIC)

TOP VIEW

GND

20

DELAYED AGC

19

GND

18

SUBSTRATE (GND)

17

TUNING METER OUT

16

MUTE LOGIC

15

V+

14

REF BIAS

13
12

QUADRATURE INPUT
NC

11

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999

8-27

File Number 561.3

CA3089

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 . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

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. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications V+ = 12V (See Figures 3 and 4)

Thermal Resistance (Typical, Note 1) θJA (oC/W)

PDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC

Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC

(SOIC - Lead Tips Only)

(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), V1 (lim) - fO = 10.7MHz,

f

= 400Hz,

AM Rejection (Terminal 6), AMR VIN = 0.1V,

AM Mod. = 30%

MOD

Deviation = ±75kHz

25 - 12 25 µV
25 45 55 - dB

Recovered AF Voltage (Terminal 6) VO (AF) VIN = 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

125
100

75
50
25

0

-25

-50

-75

-100

CURRENT INTO TERMINAL 7 (µA)

-125

V+ = 12V, T

10 7

25oC

A

5kΩ

µA

-100

-50 0 50 100

CHANGE IN FREQUENCY (kHz)

FIGURE 1. AFC CHARACTERISTICS (CURRENT AT TERMINAL

7) vs CHANGE IN FREQUENCY . (SEE TEST CIRCUIT
FIGURE 3.)

V+ = 12V, TA = 25oC

RECOVERED A UDIO (dB)MUTING CONTROL

0

-10

-20

-30

-40

AT MAXIMUM RESISTANCE

-50

-60

RECOVERED AUDIO FR OM FULL OUTPUT

(LEFT COORDINATE)

TUNER AGC DC V OLTA GE AT
TERM. 15 (RIGHT COORDINATE)

VOLTAGE AT TERMINAL 13
METER CIRCUIT (33kΩ TO GND)
(RIGHT COORDINATE)

INPUT SIGNAL (µV)

FIGURE 2. MUTING ACTION, TUNER AGC, AND TUNING

METER OUTPUT vs INPUT SIGNAL VOLTAGE. (SEE
TEST CIRCUIT FIGURE 3.)

8-28

6

5

4

3

DC (V)

2

1

100K10K1K100101

Test Circuits

L

22µH

8

CA3089E

14

10

K

15

(NOTE 5)

100

9

3.9K

0.001

µF

C

5K

pF

13

10

0.001

33K

150µA
FULL
SCALE

µF

5

AFC OUTPUT

7

6

12

470

120K

0.5M

2.7K

0.33µF

AUDIO
OUT

0.01
µF

V+ = 12V

SIGNAL

INPUT

VOLTAGE

0.01µF

0.02

µF

0.05µF

1

51

3

0.01

µF

2

11

4

TUNING METER

NOTES:

4. All resistance values are in ohms.

5. L tunes with 100pF (C) at 10.7MHz.

6. Q0 (unloaded) ≅ 75 (G.I. Automatic Mfg. Div. EX22741 or equiv alent).

FIGURE 3. TEST CIRCUIT FOR CA3089E USING A SINGLE-

TUNED DETECTOR COIL

CA3089

3K

100

pF

C

1

µF

C

100

pF

8.2K

2

13

T (NOTE 8)

10

0.001

µF

33K

150µA
FULL
SCALE

5K

7

12

5

470

120K

0.5M

V+ = 12V

22µH

SIGNAL

INPUT

VOLTAGE

0.01µF

0.02

µF

0.05µF

1

51

3

0.01

µF

2

11

8

9

CA3089E

15

0.001

14

4

10

K

TUNING METER

NOTES:

7. All resistance values are in ohms.

8. T PRI. - Q0 (unloaded) ≅ 75 (tunes with 100pF (C1) 20↑ of 34e on

7

/32” dia. form).

9. SEC. - Q0 (unloaded) ≅ 75 (tunes with 100pF (C2) 20↑ of 34e on

7

/32” dia. form).

10. kQ (percent of critical coupling) ≅ 70%.

(Adjusted for coil voltage VC) = 150mV.

Above values permit proper operation of mute (squelch) circuit “E”
type slugs, spacing 4mm.

FIGURE 4. TEST CIRCUIT FOR CA3089E USING A DOUBLE-

TUNED DETECTOR COIL

AFC OUTPUT

2.7K

6

0.33µF

AUDIO
OUT

0.01
µF

Typical Applications

300Ω

INPUT

NOTES:

11. All resistance values are in ohms.

12. Waller 4SN3FIC or equiv alent.

13. Murata SFG 10.7mA or equivalent.

14. L tunes with 100pF (C) at 10.7MHz Q
(G.I. EX22741 or equivalent).

FIGURE 5. TYPICAL FM TUNER USING THE CA3089E WITH A SINGLE TUNED DETECTOR COIL

FM

TUNER

(NOTE 12)

0.01µF

IF OUT

unloaded ≅ 75

0

250pF220pF

3.9K

10

L (NOTE 14)

C

6

0.01µF

MOD

2.7K
AUDIO

OUT

= 400Hz, Deviation = ±75kHz:

100

CERAMIC

FILTER

(NOTE 13)

330

V+ = 12V

0.05µF

11

1

3

2

Performance Data at fO = 98MHz, f

8

CA3089E

CA3089E

14

4

22
µH

100pF

9

-3dB Limiting Sensitivity. . . . . . . . . . . . . . . . . . 2µV (Antenna Level)

20dB Quieting Sensitivity. . . . . . . . . . . . . . . . . 1µV (Antenna Level)

30dB Quieting Sensitivity. . . . . . . . . . . . . . . .1.5µV (Antenna Level)

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