FM IF System/ For FM IF Amplifier Applications in High-Fidelity. Includes: IF Amplifier. Quadrature Detector, AF

Features                                                        Description

•  For FM IF Amplifier Applications in High-Fidelity, Intersil CA3089 is a monolithic integrated circuit that proAutomotive, and Communications Receivers vides all the functions of a comprehensive FM-IF system.

•  Includes: IF Amplifier, Quadrature Detector, AF The block diagram shows the CA3089 features, which Preamplifier, and Specific Circuits for AGC, AFC, Muting include a three-stage FM-IF amplifier/limiter configuration

(Squelch), and Tuning Meter with level detectors for each stage, a doubly-balanced quadrature FM detector and an audio amplifier that features

•  Exceptional Limiting Sensitivitythe optional use of a muting (squelch) circuit. at -3dB Point. . . . . . . . . . . . . . . . . . . . . . . . . . 12µV (Typ)

•  Low Distortion:              The advanced circuit design of the IF system includes desir(with Double-Tuned Coil). . . . . . . . . . . . . . . . 0.1% (Typ) able deluxe features such as delayed AGC for the RF tuner, and AFC drive circuit, and an output signal to drive a tuning

•  ^{Single-Coil Tuning Capability}     meter and/or provide stereo switching logic. In addition, inter•  High Recovered Audio. . . . . . . . . . . . . . . . 400mV (Typ) nal power supply regulators maintain a nearly constant current drain over the voltage supply range of +8.5V to +16V.

•  Provides Specific Signal for Control of Interchannel

Muting (Squelch)                                                                      The CA3089 is ideal for high-fidelity operation. Distortion in a

•  Provides Specific Signal for Direct Drive of a Tuning        CA3089 FM-IF System is primarily a function of the phase

Meter                                                                                           linearity characteristic of the outboard detector coil.

•  Provides Delayed AGC Voltage for RF Amplifier

•  Provides a Specific Circuit for Flexible AFC

•  Internal Supply-Voltage Regulators

Ordering Information

Pinout

CA3089                                                                                             CA3089

(PDIP)                                                                                               (SOIC)

TOP VIEW                                                                                         TOP VIEW

                                                                                                                                   GND                                      20 GND

^{IF IN                                      16 NC}                                                                                  IF IN                                      19 DELAYED AGC

INPUT BYPASS                                      15 DELAYED AGC                                        INPUT BYPASS                                      18 GND

DC FB BYPASS                                      14 SUBSTRATE (GND)                                DC FB BYPASS                                      17 SUBSTRATE (GND)

FRAME GND                                      13 TUNING METER OUT                                  FRAME GND                                      16 TUNING METER OUT

MUTE CONTROL                                      12 MUTE LOGIC                                         MUTE CONTROL                                      15 MUTE LOGIC

AUDIO OUT                                      11 V+                                                                     AUDIO OUT                                      14 V+

AFC OUT                                      10 REF BIAS                                                             AFC OUT                                      13 REF BIAS

IF OUT                                     12

IF OUT                                                                                         9 QUADRATURE INPUT^{QUADRATURE INPUT}

GND 10                                11 NC

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^oC to 85^oC

Thermal Resistance (Typical, Note 1)                             θ_JA (^oC/W)

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

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

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

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

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

(NOTE 3)

PARAMETER

TEST CONDITIONS

TEMP.

(^oC)

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)

-

f_O = 10.7MHz, f_MOD = 400Hz, Deviation = ±75kHz

25

-

12

25

µV

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