NSC LM3189N Datasheet

LM3189 FM IF System

LM3189 FM IF System

April 1987

General Description

The LM3189N is a monolithic integrated circuit that provides
all the functions of a comprehensive FM IF system. The
block diagram of the LM3189N includes 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 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

a

of

8.5V toa16V.

The LM3189N is ideal for high fidelity operation. Distortion
in an LM3189N FM IF system is primarily a function of the
phase linearity characteristic of the outboard detector coil.

The LM3189N has all the features of the LM3089N plus
additions.

The LM3189N utilizes the 16-lead dual-in-line plastic pack­age and can operate over the ambient temperature range of

b

40§Ctoa85§C.

Block Diagram

Features

Y

Exceptional limiting sensitivity: 12 mV typ atb3dB
point

Y

Low distortion: 0.1% typ (with double-tuned coil)

Y

Single-coil tuning capability

Y

Improved (SaN)/N ratio

Y

Externally programmable recovered audio level

Y

Provides specific signal for control of inter-channel mut­ing (squelch)

Y

Provides specific signal for direct drive of a tuning me­ter

Y

On channel step for search control

Y

Provides programmable AGC voltage for RF amplifier

Y

Provides a specific circuit for flexible audio output

Y

Internal supply voltage regulators

Y

Externally programmable ON channel step width, and
deviation at which muting occurs

All resistance values are in X

*L tunes with 100 pF (C) at 10.7 MHz, Q

(Toko No. KACS K586HM or equivalent)

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

j

0

TL/H/7960

75

TL/H/7960– 1

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Supply Voltage Between Pin 11 and Pins 4, 14 16V

DC Current Out of Pin 12 5 mA

DC Current Out of Pin 13 5 mA

DC Current Out of Pin 15 2 mA

Electrical Characteristics T

Symbol Parameter

e

A

a

25§C, V

(See Single-Tuned Test Circuit)

STATIC (DC) CHARACTERISTICS

I

11

Quiescent Circuit Current 20 31 44 mA

DC Voltages:
V1 Terminal 1 (IF Input) 1.2 2.0 2.4 V
V2 Terminal 2 (AC Return to Input) No Signal Input, Non Muted 1.2 2.0 2.4 V
V3 Terminal 3 (DC Bias to Input) 1.2 2.0 2.4 V
V15 Terminal 15 (RF AGC) 7.5 9.5 11 V
V10 Terminal 10 (DC Reference) 5 5.75 6 V

DYNAMIC CHARACTERISTICS

VI(lim) Input Limiting Voltage (b3 dB Point) 12 25 mV

AMR AM Rejection (Term. 6) V

e

IN

VO(AF) Recovered AF Voltage (Term. 6) AM Mod.e30%

THD Total Harmonic Distortion (Note 1) f

Single Tuned (Term. 6) Deviation
Double Tuned (Term. 6)

SaN/N Signal Plus Noise to Noise Ratio

e

V

IN

(Term. 6)

f

DEV

Deviation Mute Frequency f

V16 RF AGC Threshold 1.25 V

V12 On Channel Step V

Note 1: THD characteristics are essentially a function of the phase characteristics of the network connected between terminals 8, 9, and 10.

Note 2: For operation in ambient temperatures above 25

C/W junction to ambient.

of 80

§

C, the device must be derated based on a 150§C maximum junction temperature and a thermal resistance

§

e

IN

Power Dissipation (Note 2) 1500 mW

Operating Temperature Range

Storage Temperature Range

b

40§Ctoa85§C

b

65§Ctoa150§C

Lead Temperature (Soldering, 10 sec.) 260§C

e

12V

Conditions

Min Typ Max Units

0.1V 45 55 dB

325 500 650 mV

0.1 %

0.1V

f

o
mod

e

10.7 MHz,

e

400 Hz,

g

75 kHz 0.5 1 %

65 80 dB

0.1V f
f

e

0

mod

k

g

40 kHz 0

DEV

l

g

40 kHz 5.6

DEV

g

40 kHz

V

Connection Diagram

Dual-In-Line Package

TL/H/7960– 2

Top View

Order Number LM3189N

See NS Package Number N16E

2

Test Circuits

All resistance values are in X

*L tunes with 100 pF (C) at 10.7 MHz,

Q

(unloaded)j75 (Toko No. KACS K586HM

o

or equivalent)

e

**C

0.01 mF for 50 ms de-emphasis (Europe)

e

0.015 mF for 75 ms de-emphasis (USA)

All resistance values are in X

*T:PRIÐQ

(unloadedÐj75 (tunes with 100 pF

o

(C12)) 20t of 34e on 7/32

(unloaded)j75 (tunes with 100 pF

SECÐQ

o

(C2)) 20t of 34e on 7/32
kQ(percent of critical coupling)j70%
(adjusted for coil voltage (V

Above values permit proper operation of mute
(squelch) circuit ‘‘E’’ type slugs, spacing 4 mm

e

**C

0.01 mF for 50 ms de-emphasis (Europe)

e

0.015 mF for 75 ms de-emphasis (USA)

×

dia form

×

dia form

C

)e150 mV

Test Circuit for LM3189N Using a Single-Tuned Detector Coil

TL/H/7960– 3

Test Circuit for LM3189N Using a Double-Tuned Detector Coil

TL/H/7960– 4

3

Complete FM IF System for High Quality Tuners

The circuit provides a complete FM IF system for a high
quality receiver. Either one or two stages of amplification
and bandpass filtering may be desired, depening on the

Complete FM IF System for High Quality Receivers

All resistance values are in X

CF: Ceramic filters, Toko CSFE or equivalent

*L tunes with 100 pF (C) at 10.7 MHz

Q

(unloaded)j75 (Toko No. KACS K586 HM

o

or equivalent)

Printed Circuit Board and Component Layout

receiver requirements. See graph for Typical Limiting and
Noise Characteristics for each circuit configuration which
can be compared to the LM3189N alone.

TL/H/7960– 5

Component Side

4

TL/H/7960– 6

Typical Performance Characteristics

AM Rejection (30% Mod) vs
IF Input Signal

Muting Action, Tuner AGC, and Tuning
Meter Output as a Function
of Input Signal Voltage

Mute Control Output
(Pin 12) vs IF Input Signal

Typical Audio Attenuation
(Pin 6) vs Mute Input
Voltage (Pin 5)

AFC Characteristics (Current
at Term 7 as a Function
of Change in Frequency)

Deviation Mute Threshold as
a Function of Load Resistance
(Between Term 7 and Term 10)

Typical Limiting and Noise
Characteristics

TL/H/7960– 7

5

Schematic Diagram

TL/H/7960– 8

6

Schematic Diagram (Continued)

TL/H/7960– 9

7

Physical Dimensions inches (millimeters)

LM3189 FM IF System

Dual-In-Line Package (N)

Order Number LM3189N

See NS Package Number N16E

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.

National Semiconductor National Semiconductor National Semiconductor National Semiconductor
Corporation Europe Hong Kong Ltd. Japan Ltd.

1111 West Bardin Road Fax: (
Arlington, TX 76017 Email: [e-mail] Ocean Centre, 5 Canton Rd. Fax: [phone]
Tel: [phone] Deutsch Tel: (
Fax: [phone] English Tel: (

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

Fran3ais Tel: (
Italiano Tel: (

a

49) 0-180-530 85 86 13th Floor, Straight Block, Tel: [phone]

a

49) 0-180-530 85 85 Tsimshatsui, Kowloon

a

49) 0-180-532 78 32 Hong Kong

a

49) 0-180-532 93 58 Tel: [phone]

a

49) 0-180-534 16 80 Fax: [phone]