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, VCC= 8.0 V, VIN= 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

VCC= +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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