Sanyo LA3401 Specifications

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.

Monolithic Linear IC

VCO Non-Adjusting PLL FM MPX

Stereo Demodulator with FM Accessories

Ordering number:ENN1868C

LA3401

SANYO Electric Co.,Ltd. Semiconductor Company

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

Overview

The LA3401 is a multifunctional MPX demodulator IC
designed for FM stereo electronic tuning. It features the
VCO non-adjusting function that eliminates the need to
adjust free-running frequency of VCO and the accessory
functions such as FM/AM input, FM/AM input changeover ,
muting.

Applications

• Home stereos, portable hi-fi sets.

Functions

• VCO non-adjusting function.

• PLL MPX stereo demodulator.

• Gain variable type post amplifier.

• FM-AM changeover.

• Muting at the FM-AM changeover mode (changeover
mute)

• Muting function.

• Drive pin for external muting.

• VCO stop function.

• Separation adjust function.

• Muting at the VCC-ON mode.

Features

• Non-adjusting VCO : Eliminates the need to adjust free­running frequency.

• Good temperature characteristic of VCO : ±0.1% typ. for
±50°C change.

• Less high frequency distortion of stereo main signal
(0.07% typ. at f=10kHz) (Non-adjusting PLL makes it
possible to make the capture range narrower, providing
less high frequency beat distortion of stereo main sig­nal.)

• Low distortion : Mono 0.01% typ.

Main 0.025% typ.

• High S/N : 91dB typ./mono 300mV input, LPF

94dB typ./mono 400mV input, LPF

• High voltage gain : Approximately 13dB (Commonto FM,
AM at standard constants) This gain can be varied by
external constants.

• Wide dynamic range : Distortion 1.0%/mono 800mV,

1kHz input (Post amplifier gain :
Approximately 13dB)

• The semifixed resistor (pin 4) for separation adjust can be
changed to a fixed resistor or can be removed.

• High ripple rejection : 34dB typ.

Package Dimensions

unit:mm

3059-DIP22S

[LA3401]

22 12

6.4

7.62

111

21.2

3.25

3.9max

3.3

0.51min

0.95 0.48

1.71.78

SANYO : DIP22S

0.25

12800TH (KT)/41594HK/O077KI/6066KI/6195KI, TS No.1868–1/15

LA3401

Specifications

Absolute Maximum Ratings at Ta = 25˚C

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erutarepmeTgnitarepOrpoT 07+ot02–

erutarepmeTegarotSgtsT 521+ot04–

Operating Conditions at Ta = 25˚C

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Operating Characteristics at Ta = 25˚C, VCC=13V, f=1kHz, input 400mV, L+R=90%, pilot=10%

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egatloVFFO-etuMffotmVegatlov51niP 3.0V

egatloVrevoegnahCMA/MFV

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FFO

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(Note) *1 : The signal voltage after separation adjust is measured.

*2 : The maximum voltage applied to pin 10 (FM/AM changeov er v oltage) is set to VCC–2V (not exceeding 10V).
*3 : Capture range is defined by :

xam 0.61V

CC

xam 0.03Am

L

Ta≤45˚C

CC

po 0.41ot5.6V

CC

nimpytxam

zH001=f54Bd

zHk1=f0455Bd

zHk01=f05Bd

onoM10.080.0%

niamoeretS520.01.0%

busoeretS20.01.0%

MA10.080.0%

k1.5=gR,Vm003,onoM Ω FPL,19Bd
k1.5=gR,Vm004,onoM Ω FPL,0849Bd

Vm003tupnI,MA,onoM20826115451Vm
Vm004tupnI,MA,onoM070105510602Vm

MA → MF5627Bd
MF → MA5627Bd

MA,egatlov01niP → MF5.0V

MA-MF

MF,egatlov01niP → MA3.401V

oerets-onoM53041Vm

etum-onoM51011Vm

etum-oeretS53041Vm

etum-MA51011Vm

0.31V

sgnitaR

3–V

CC

VCC2–V

2–V

CC

˚C
˚C

tinU

Ω

Capture range = – × 100 [%]

F0–F1F1F0–456

456

Where F0 : Free-running frequncy

F1 : Capture frequency when input frequency is changed.

No.1868–2/15

Test Circuit

LA3401

* : CSB456F 11typ (Murata)
LPF : BL-13 (Korin Giken)
amp : THE=0.005% max, VNI=1µV max, band width : 100kHz min, ri=330kΩ max.
VG : S/N, muting attenuation, crosstalk measurement=50dBmin, Other measurements than above=0dB

No.1868–3/15

Sample Application Circuit

LA3401

(Note 1) Connect pin 14 to GND through a capacitor of

0.01µF or greater.

(Note 2) For R11, C9, it is recommended to use the

following values according to an IF IC to be
used.

CIFI11R9C

5321ALk3.3µ22.0

N1321,0321,5621ALk6.5µ22.0

0621ALk01µ1.0

* : CBS456F11 (Murata)

KBR-457HS (Kyocera)

Sample Printed Circuit Pattern

No.1868–4/15

LA3401

External Parts

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Note 1 : For C9, R11 setting, refer to Sample Application Circuit (Note 2) and Note 2 for Using IC.
Note 2 : To advance stereo operation start timing, the value of C10 is decreased. Decreasing the value of C10 narrows

capature range. This narrowing also depends on the value of C9. It is recommended to use C10 of 0.47µF or
greater.

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Pin Voltage, Name Remarks

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1
2
3
4
5
6
7
8
9

01
11
21
31
41
51

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3
–
–
0
–

–

V

9.4ro0

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tupniMF

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CC

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k02rotsisertupnI Ω

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tupnisuniM

tuptuoR

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k08rotsisertupnI Ω

Continued on next page.

No.1868–5/15