Sanyo LA3460M Specifications

Ordering number : EN4842

93098HA(OT)/81994TH (OT) B8-0889 No. 4842-1/13

Overview

The LA3460M is a high performance car stereo tuner IC

that includes an FM noise canceller and a stereo multiplex

demodulator.

Functions

[Noise Canceller Block]

• Built-in low- and high-pass filters

• Noise AGC

• Pilot signal compensation function

[Multiplex Block]

• Adjustment-free VCO (456 kHz)

• Level follower type pilot canceller

• SNC (stereo noise control)

• HCC (high cut control)

• Stereo indicator driver

• VCO oscillator stop function

Features

[Noise Canceller Block]

• Improved ignition noise rejection during medium to

weak field reception

Adoption of a new noise AGC circuit

Optimized gate time

• High audio quality design with malfunction prevention in

the high frequency band and for overmodulated signals

Improved dynamic range low-pass and high-pass filters

[Multiplex Block]

• High signal-to-noise ratio and low distortion (stereo S/N

ratio: 79 dB, THD: 0.1 %)

• Good high frequency band separation (50 dB at 1 kHz

and 30 dB at 10 kHz)

• Adoption of a PLL circuit with an adjustment-free VCO

(456 kHz ceramic resonator)

• Improved pilot cancellation level (25 to 30 dB) using a

new cancellation circuit

• Built-in 114 kHz and 190 kHz anti-birdie filters

• Adoption of new SNC characteristics to reduce

multipath noise

• Reduced printed circuit board space requirements due to

the adoption of a mini-flat package (MFP-24)

Package Dimensions

unit: mm

3045B-MFP24

SANYO: MFP24

[LA3460M]

LA3460M

FM NC + MPX Demodulator

for Car Stereo Tuners

Monolithic Linear IC

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

Specifications

Maximum Ratings at Ta = 25°C

Operating Conditions at Ta = 25°C

Operating Characteristics

at Ta = 25°C, V

= 8.0 V, V

= 300 mVrms, f = 1 kHz, L + R = 90%, pilot = 10% modulation, VSNC (V8) = 3

V, VHCC (V9) = 3 V

No. 4842-2/13

LA3460M

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max 10 V

Lamp influx current I

max 30 mA

Allowable power dissipation Pd max Ta = 85°C 490 mW

Operating temperature Topr –40 to +85 °C

Storage temperature Tstg –40 to +150 °C

Parameter Symbol Conditions

Ratings

Unit

min typ max

Quiescent current Icco No input 15 25 35 mA

Channel separation SEP 30 50 dB

Total harmonic distortion THD MONO 0.06 0.5 %

Lamp lit level V

Pilot signal 4.0 7.3 13.0 mVrms

Lamp hysteresis hy 3.0 6.0 dB

Demodulator output V

MONO 260 330 410 mVrms

S/N ratio S/N Rg = 0 Ω, MONO 70 85 dB

Channel balance CB MONO 20

× log (L/R) –1.0 0 +1.0 dB

Pilot cancellation PC 30 mVrms pilot signal 10 26 dB

Gate time tgate 1 µs 100 mVp-o, pulse input, f = 1 kHz 30 60 µs

Noise sensitivity S

1 µs pulse input, f = 1 kHz 30 60 mVp-o

SNC (1) V = 1.2 V, separation L → R 30 50 dB

SNC SNC (2) V = 0.6 V, separation L → R 6.0 8.5 11.0 dB

SNC (3) V = 0.1 V, separation L → R 0.5 2.0 dB

HCC (1) V = 1.2 V, f = 10 kHz, left output –1.0 0 +1.0 dB

HCC HCC (2) V = 0.6 V, f = 10 kHz, left output –8.0 –5.0 –2.0 dB

HCC (3) V = 0.1 V, f = 10 kHz, left output –14.0 –10.0 –6.0 dB

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

8.0 V

Operating supply voltage range V

op 7.0 to 9.0 V

Pin Functions

Pin Assignment

No. 4842-3/13

LA3460M

Pin No. Function Description

1 Noise sensitivity Noises sensitivity adjustment

2 Noise AGC

3 Gate time

4 Hold circuit

5 Pilot output

6 V

= +8.0 V

7 HCC capacitor High cut filter

8 SNC control

9 HCC control

10 Left channel output

11 Right channel output

12 Pilot canceller input

13 Pilot canceller output

14 Separation adjustment

15 NC

16 NC

17 456 kHz oscillator circuit Ceramic resonator

18 Phase comparator L.P.F (+) Phase comparator low-pass filter

19 Phase comparator L.P.F (–) Phase comparator low-pass filter

20 GND

21 PLL input PLL input

22 Stereo indicator Active low

23 Composite input Composite signal input

24 Pilot detector lpf

Equivalent Circuit Block Diagram

Sample Application Circuit

No. 4842-4/13

LA3460M

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