Sanyo LA4167M Specifications

Ordering number : ENN4036C

42000TN (OT)/D2599TH (OT)/O282TS / 9121YO No. 4036-1/20

0.25

15.3

1

15

30

16

0.65

0.4

1.0

2.5max

2.250.1

0.65

7.9

9.2

10.5

SANYO: MFP30SD

[LA4167M]

LA4167M

SANYO Electric Co.,Ltd. Semiconductor Company

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

1-channel Record/Playback System

for Microcassette and Compact Cassette Recorders

Monolithic Linear IC

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.

Overview

The LA4167M is a record/playback system IC
supporting microcassette and compact cassette recorders.
This is a high-performance IC that has on-chip a
governor circuit for motor control, a voice sensor circuit
that detects sounds and switches the motor on and off,
and a cue-tone circuit for instantly finding the desired
segment to play back.

Functions

• Microphone and playback preamps

• Record amplifier

• Power amplifier (BTL 4 Ω — single power during

recording)

• Cue-tone oscillator and current amplifier (15 Hz typ.
sine wave)

• Governor circuit

• Microphone power supply

• LED drive

Features

• Can switch between recording and playback with a
single mechanical switch.

• Pause switch can switch the governor on and off.

• Cue-tone switch can record specified oscillator output
(sine wave) during recording.

• The governor can automatically be switched on or off
according to the mike input level during recording, and
the on/off level for the governor can be varied
continuously by the external volume control (used to
adjust volume during playback).

• Mike monitor level is continuously variable.

• LED pin for turning off the LED only when cue-tone is
on.

Package Dimensions

unit: mm

3073A-MFP30SD

LA4167M

No. 4036-2/20

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max 4.5 V
Allowable power dissipation Pd max 800 mW
Operating temperature Topg –10 to +50 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Maximum Ratings at Ta = 25°C

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

CC

3.0 V

Power supply voltage operating range V

CC

op 1.8 to 3.6 V

Resistance load (power) R

L

pwr 4 Ω

Resistance load (preamp) R

L

pre 10 kΩ

Operation Characteristics at Ta = 25°C, VCC= 3.0 V, RL= 4Ω (power), RL= 10 kΩ (preamp), f = 1 kHz,

0 dBm = 0.775 V PLAY mode during BTL, REC mode during single

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Pre + Power + GVN]

Silence current

I

CC-R

REC MODE, Vi=0V 6 12 18 mA

I

CC-P

PLAY MODE, Vi=0V 12 18 25 mA

[Pre + Power]

Voltage gain VG

TP

PLAY MODE, VO=–5dBm 70 72.5 75 dB

[EQ AMP]

Voltage gain (open) VG

OPCNF

=100µF 80 85 90 dB

Voltage gain (closed) VG

P

50 52 54 dB

Maximum output voltage V

OP

max THD=1% 0.5 0.75 1.0 V

Total harmonic distortion THD

PVO

=0.3V 0.01 0.2 0.6 %

Input conversion noise voltage V

NIP

Rg=2.2kΩ, DIN AUDIO 1.0 2.0 µV

Ripple rejection Rrp Rg=2.2kΩ, f

R

=1kHz, 1kHz Filter

45 60 dB

[MIC AMP]

Voltage gain (open) VG

OMCNF

=100µF 75 80 85 dB

Voltage gain (closed) VG

MI

EQ parameter ON, 3k, 3300pF IN 44 46 48 dB

Maximum output voltage V

OMAXM

THD=1%, RL=10kΩ 0.5 0.75 1.0 V

Total harmonic distortion THD

MVO

=0.3V 0.01 0.6 1.0 %

Input conversion noise voltage V

NIM

Rg=2.2kΩ, DIN AUDIO 1.0 2.0 µV

Ripple rejection Rr

M

Rg=2.2kΩ, fR=1kHz, 1kHz Filter 45 65 dB

Input resistance R

IM

24 32 40 kΩ

[MIC + REC]

Voltage gain (closed) VG

RT

Vol min 64.5 66.5 68.5 dB

Maximum output voltage V

OMAXR

THD=5% 0.6 1.0 1.3 V

Total harmonic distortion THD

RTVO

=0.85V 0.5 1.2 3.0 %

Output noise voltage V

NORT

MIC input, Rg=2.2kΩ, DIN AUDIO 5.0 10 mV

Ripple rejection Rr

RT

38 45 dB

[POWER AMP]

Voltage gain (open) VG

BTL

BTL ON, VO=–10dBm 21.5 24 26.5 dB

Voltage gain (closed) VG

SIN

BTL OFF, VO=–10dBm 20.5 23 25.5 dB

Output power (BTL) P

OBTL

THD=10% BTL 200 350 500 mW

Output power (SIN) P

OSIN

THD=10% Single 50 120 250 mW

Total harmonic distortion THD

BTL

BTL ON, VO=0.25V 0.1 0.8 2 %

Output noise voltage V

NOBTL

BTL ON, Rg=0 10 20 50 µV

Ripple rejection Rr

BTL

BTL ON, Rg=0, fR=1kHz, 1kHz Filter 50 70 dB

Output DC offset V

DC OFF

01050mV

Input resistance R

INBTL

21 30 39 kΩ

Continued on next page.

LA4167M

No. 4036-3/20

Continued from preceding page.

Parameter Symbol Conditions

Ratings

Unit

min typ max

[ALC]

ALC width ALC W

Input level width when output

40 50 65 dB

distortion is 5% and ALC is on
ALC distortion ALC THD Vim=–40dBm 0.1 1.5 2.5 %
ALC output ALC V

O

Vim=–40dBm 0.35 0.45 0.55 V
ALC input on ALC V

IN

–75 –70 –65 dB

[Voice sensor (VOX)]

Operation start input voltage V

OP

min VOLUME (10kΩ) max –90 –85 –80 dB

Input hysteresis V

O HL

369dB

[Oscillator]

Oscillation frequency f

OSCCOSC

=0.47µF 13.5 15 16.5 Hz

[LED]

LED drive current I

LED

REC LED 8 15 22 mA

[Governor]

Reference voltage Vref Im=100mA 1.1 1.25 1.4 V
Shunt ratio K Im=50–100mA 45 50 55
Residual voltage Vsat V

REF=VCONT

, Im=200mA 0.1 0.2 0.5 V

Reference voltage — voltage characteristics

∆Vref

/∆VCCVCC=1.8 to 4.5V, Im=100mA 0 0.2 0.6 %/V

Vref

Shunt voltage ratio — voltage characteristics

∆K

/∆VCCVCC=2.0 to 4.5V, Im=50–100mA

0 0.3 0.7 %/V

K

Reference voltage — current characteristics

∆Vref

/∆Im Im=50–200mA 0 0.002 0.03 %/mA

Vref

Shunt voltage ratio — current characteristics

∆K

/∆Im Im=50–100mA to 150–200mA –0.07 +0.03 +0.07 %/mA

K

Pin Array and Block Diagram

LA4167M

No. 4036-4/20

Test Circuit

1

27k

Ω

100

Ω

RX

300k

Ω

RX

2.2k

Ω

RX

2k

Ω

RX

20k

Ω

30k

Ω

470k

Ω

10k

Ω

2.2k

Ω

4700pF

1

µ

F

33

µ

F

K1

4.7

µ

F

22

µ

F

0.47

µ

F

1

µ

F

1

µ

F

0.033

µ

F

0.082

µ

F

10

µ

F

220

µ

F

3300pF

1000pF

1

µ

F

22

µ

F

+

+

+

+

++

+

+

+

PRE
NF

PRE
GND

EQ
IN

MIC
IN

V

REF

OUT

MIC
V

CC

R.F
OUT

LED
DRIVE

LED

Play

R/P
SW

PAUSE

R/P
MUTE

GVN
CONT

GVN
V

REF

VS

Im

GVN
GND

GVN
OUT

PRE
OUT

REC
IN

REC
OUT

ALC
CONT

VOX
CONT

VOX
DELAY

Cue
Tone
ON/OFF

Cue
Tone
OSC

Cue
Tone
OUT

PWR
IN

PWR
OUT1

PWR
GND

PWR
OUT2

V

CC

10k

Ω

1M

Ω

+

2

K2K8K3

K4

VCC

SW

ALC VOX

VOX Cue-Tone

R.F

R/P

GVN

POWER

V

REF

RECMICEQ

51.5dB

+

–

++

–

+
–

–

MIC
V

CC

1

PAUSE

A12755

+

4

Ω

4

Ω

K5

Vref

V

CC

(a)

100

µ

F

+

Vref

K6

20k

Ω

100

Ω

10k

Ω

50k

Ω

30k

Ω

30k

Ω

300

Ω

3k

Ω

2.2k

Ω

500k

Ω

0.47µF

23456789101112131415

161718192021222324252627282930

0.082

µ

F

470

µ

F

+

220

µ

F

3.0V

K7

REC

Sample Application Circuit

1

R3

27k

Ω

R2

100

Ω

RX

300k

Ω

RX

2.2k

Ω

RX

2k

Ω

RX

20k

Ω

30k

Ω

R5

470k

Ω

R4

10k

Ω

2.2k

Ω

C4

4700pF

C5

1

µ

F

C7

33

µ

F

C8

4.7

µ

F

C9

22

µ

F

C10

0.47

µ

F

C17

220

µ

F

C19

1

µ

F

C20

1

µ

F

C14

0.082

µ

F

C15
1µF

R9

C15

0.082

µ

F

C26

0.033µF

C21

10

µ

F

C22

220

µ

F

C23

100

µ

F

C24

4700pF

C25

6800pF

C12

1000pF

C13

0.033

µ

F

C6

1

µ

F

C3

22

µ

F

+

+

+

+

+

++

+

++

+

+

PRE
NF

PRE
GND

EQ
IN

MIC
IN

V

REF

OUT

MIC
V

CC

R.F
OUT

LED
DRIVE

LED

MIC.JK

PLAY

R/P.HEAD

REC

C.M

EAR.PH.JK

R/P
SW

PAUSE

R/P
MUTE

GVN
CONT

GVN
V

REF

VS

GVN
GND

GVN
OUT

PRE
OUT

REC
IN

REC
OUT

ALC
CONT

VOX
CONT

VOX
DELAY

Cue
Tone
ON/OFF

Cue
Tone
OSC

Cue
Tone
OUT

PWR
IN

PWR
OUT1

PWR
GND

PWR
OUT2

V

CC

R6

1M

Ω

+

2

ALC VOX

VOX Cue-Tone

R.F

R/P

GVN

POWER

V

REF

RECMICEQ

51.5dB

+

–

++

–

+
–

–

MIC
V

CC

1

PAUSE

A12756

R7

20k

Ω

R17

12k

Ω

R14

30k

Ω

R13

30k

Ω

R18

6.8k

Ω

R10

100

Ω

R12

10k

Ω

R15

300

Ω

R16

3k

Ω

R19

6.8k

Ω

R11

51k

Ω

R1

10k

Ω

R8
500k

Ω

C11

0.47µF

C1

47µF

C2

+

23456789101112131415

161718192021222324252627282930

LA4167M

No. 4036-5/20

Pin Assignments and Equivalent Circuits
[VCC=3.0V]

Continued on next page.

LA4167M

No. 4036-6/20

Continued from preceding page.

Continued on next page.

LA4167M

No. 4036-7/20

Continued from preceding page.

[VCC=3.0V, Im=100mA, RT=100Ω]

LA4167M

No. 4036-8/20

[VCC=3.0V, LED Load 300Ω]

LA4167M

No. 4036-9/20

[VCC=3.0V]

LA4167M

No. 4036-10/20

Description of Externally Mounted Parts

Continued on next page.

LA4167M

No. 4036-11/20

IC Usage Cautions and Explanation of Operation

(1) Playback preamp and power amp voltage gain distribution during playback

• The voltage gain of the preamp can be adjusted by resistor R2, connected externally. In this case, be aware that
varying the voltage gain causes the voltage gain for the playback preamp and the mike amp to be each varied
simultaneously.

Continued from preceding page.

LA4167M

No. 4036-12/20

(2) Mike amp, REC amp, and power amp voltage gain distribution during recording

• Be aware that during recording, the power amp is not BTL, and there is single operation for only power amp 2.

(3) VOX circuit (VOX equivalent circuit)

• VOX on time can be adjusted by varying C8 at pin 6. Increasing the capacitance delays attack time, and reducing

capacitances hastens it (VOX on = Approx. 40 ms when C8 = 4.7 µF and C9 = 22 µF).

• VOX off time can be adjusted by varying C9 at pin 7 (VOX off = Approx. 4s when C8 = 4.7 µF and C9 = 22 µF).

• To continue VOX circuit operation when MIC input is below the specified level, increase the capacitance of the

capacitor between pin 7 and V

CC

.

• To keep the governor circuit on after the VOX circuit is switched off, turn on the switch and ground pin 7 in the

equivalent circuit shown above.

• Only a capacitor is mounted between pin 6 and ground. A resistor is not mounted because when the VOX circuit

is turned on, a minute charging current is present at pin 6, and the resistance would bypass this minute current,
causing a delay in operation and, in the worst case, failure of the VOX circuit to operate.

• The VOX circuit has a hysteresis width of approximately 6 dB. But as shown in the figure above, the VOX

circuit is switched on when the voltage at pin 6 is over approximately 1.3 V, and is switched off when voltage is
below approximately 0.7 V. The bias to keep the VOX circuit on at this time must be an average or smooth
voltage over approximately 0.75 V.

LA4167M

No. 4036-13/20

(4) Cue-tone (externally mounted cue-tone circuit)

• Cue-tone begins to operate at the pin 8 ground, as shown in the figure above. The LED goes out at this time.

• Capacitors C10 and C11 for cue-tone operation must be of high quality and of identical precision.

• Capacitors C10 and C11 can be varied to change the cue-tone frequency. Increasing the capacitance of C10 and

C11 delays the frequency, and decreasing this capacitance hastens it. In the external circuit shown above, f

OSC

=

Approx. 15 Hz.

(5) R/P mute (mute circuit during R/P switching)

• In the mute circuit depicted above, a minute pulse is input to pin 21 as shown in the figure to switch from REC to

PLAY or from PLAY to REC. At this time, current is determined by:

IM=

E2–E

1

R13

In this case,

IM=

2.0V–1.5V
=16.7µA

30kΩ

• Muting capacitors C19 and C20 are used to adjust the muting time: muting time increases when capacitance is
high and decreases when capacitance is low. Be aware, however, that if capacitance is excessive, power amp
onset is delayed when VCCis on. Capacitance of 0.1 µF to 1 µF is recommended.

• If voltage over 1.6 V is applied to the mute pin when VCC= 3.0 V, each amp is muted. Be aware that application
of voltage higher than VCCin this case will disable muting.

• The power, REC, VOX, and ALC amps can be muted.

LA4167M

No. 4036-14/20

(6) LEDs

• Pin 24 is dedicated to LED use. The LED is lit during normal operation, and goes out only when cue-tone is on
in the recording mode.

• With 10 mA typ. at 3.0 V for I

LED

at the LED pin, it is possible to switch between red and green LEDs as shown

in the diagram below.

• The LED pin should be left open if not used.

LA4167M

No. 4036-15/20

LA4167M

No. 4036-16/20

LA4167M

No. 4036-17/20

LA4167M

No. 4036-18/20

LA4167M

No. 4036-19/20

LA4167M

PS No. 4186-20/20

This catalog provides information as of April, 2000. Specifications and information herein are subject to
change without notice.

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.