Sanyo LA3241 Specifications

Ordering number : ENN2564B

22502TN (OT)/10700TH (KT)/O147TA, TS No. 2564-1/15

Overview

The LA3241 is a preamp IC for compact cassette player recording-only use. The distinctive feature of the LA3241 is that it contains mechanical switches which have been so far connected externally as peripheral parts.

Applications

• Radio-cassette tape recorder/tape deck-use stereo compact cassette player.

Features

• Wide ALC : ALCW=60dB typ.

• 2-step ALC level : ALCVo=0.42V, 0.65V.

• On-chip electronic select switches permitting selection of normal/metal tape and normal/higher speed mode recording equalizer.

• On-chip mike amp : Gain 25dB typ fixed.

• Low-voltage operaton because the Schottky barrier diode is used for ALC rectifier diode.

• Wide operating voltage : VCC=4.5 to 14.0V.

Functions

• Recording preamp ×2

• Mike amp ×1

• ALC ×1

• Electronic switch ×6

Package Dimensions

unit: mm

3067A-DIP24S

0.48

(3.25)

3.3

3.9max

0.51min

21.0

(0.71)

1.78

0.25

7.62

6.4

1

12

24

13

0.95

0.9

SANYO: DIP24S (300 mil)

[LA3241]

LA3241

SANYO Electric Co.,Ltd. Semiconductor Company

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

Preamplifier for

Compact Cassette Recording-Only Use

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.

Parameter Symbol Conditions Ratings Unit

Maximum Supply Voltage V

CC

max 16 V Allowable Power Dissipation Pd max 720 mW Operating Temperature Topr –20 to +75 °C Storage Temperature Tstg –40 to +125 °C

Specifications

Maximum Ratings at Ta = 25°C

No. 2564-2/15

LA3241

Parameter Symbol Conditions

Ratings

Unit

min typ max

Quiescent Current I

CCO

Me/Nor, Nor/High SW off 5 7.5 12 mA

Quiescent Current I

CCS

Me/Nor, Nor/High SW on 10 15 20 mA [REC Amp] Voltage Gain (Open) VG

O1

75 85 dB Voltage Gain (Closed) VG1 VO=0dBm 41.5 43.5 46.0 dB Total Harmonic Distortion THD1 VO=0.4V 0.1 0.7 % Maximum Output Voltage V

O

max THD=1% 0.7 1.0 V

Equivalent Input Noise Voltage V

NI1

Rg=2.2kW, BPF : 20Hz to 20kHz 1.2 1.8 µV

Input Resistance Ri1 40 50 60 kΩ

Crosstalk

CT1 Between REC amps 50 70 dB

CT2 REC amp → Mike amp 60 80 dB Channel Balance CB Vi=–50dBm 0 2 dB [Mike Amp] Voltage Gain VG

O2

40 50 dB Voltage Gain VG2 VO=0dBm 23 25 27 dB Total Harmonic Distortion THD2 VO=0.4V 0.1 0.7 V Maximum Output Voltage VO2 THD=1% 0.8 1.1 V Equivalent Input Noise Voltage VNI2 Rg=2.2kΩ, BPF : 20Hz to 20kHz 1.2 1.7 µV Input Resistance Ri2 40 50 60 kΩ Crosstalk CT3 Mike amp → REC amp 45 60 dB [ALC]

ALC Range ALC

W

Input range when output distortion becomes

45 55 dB

1% aftrer ALC begins to be applied.

ALC Balance ALC

B

Output difference between CH1 and CH2. 0 2 dB

ALC Distortion ALC

THD

Vi=–40dBm 0.15 0.80 %

ALC Output Voltage ALC

Vo

Vi=–40dBm, pin 17 Gnd 0.37 0.46 0.57 V Vi=–40dBm, pin 17 open 0.6 0.7 0.85 V

Crosstalk CT4 Between REC amps 45 60 dB

CT5 REC amp → Mike amp 50 70 dB [Switch] On-State Resistance R

ON

30 70 Ω

DC Feedback Resistance R

F1

40 50 60 kΩ

Operating Characteristics at Ta = 25°C, VCC= 6 V, RL= 10kΩ, f = 1 kHz, 0dB = 0.775 V

Parameter Symbol Conditions Ratings Unit

Recommended Supply Voltage V

CC

6 V

Operating Voltage range V

CC

op 4.5 to 14.0 V

Recommended Operating Conditions at Ta = 25°C

No. 2564-3/15

LA3241

Equivalent Circuit Block Diagram

24 23 22 21

20

19

18

17

16

15

14

13

1 2 3 4 5 6 7 8 9 10 11 12

3.6kΩ3.6kΩ

50kΩ

10kΩ

50kΩ

IN2 NF2 OUT2 RFC V

CC

Nor / High

OUT2

Me / Nor

OUT2-1

Me / Nor

OUT2-2

ALC

IN2

ALC

CONT

Nor / HighSWMIC

OUT

IN1 NF1 OUT1 MICINGNDNor / High

OUT1

Me / Nor

OUT1-1

Me / Nor

OUT1-2

ALC

IN1

ALC Me / NorSWMIC

NF

+

--

+

preamp1

preamp2

ALC

MIC

SBD

Me / Nor SW

SBD

Nor / High

Speed

ILA00602

R F

Top view

Equivalent Circuit

1

24 23

2 3 4 5 6 7 8 9 10 11 12

TR18

High

Speed

Charge

TR12

TR11

TR10TR9

TR8

TR1

TR7

TR5

TR2

TR3 TR4

TR6

TR14

TR13

TR15TR16

TR17

VR2

3.6kΩ 50kΩ

VR1

D1D2

D4 D5

TR9

50kΩ

10kΩ

100µA

100Ω

50Ω

50kΩ

3.6kΩ

50Ω

10kΩ

100Ω

22 21

20 19 18 17 16 15 14 13

ILA00603

--

~

No. 2564-4/15

LA3241

Test Circuit Diagram

24123222321420519

6

1781691510141113

12

S14

S13

S4 1/2

SW4

VNF2V

NFS

2 VO2 MIC OUT

2

21

S9

S1

S11

S10

I

CC

V

CC

GND

1 2

2 1

2

1

2

1

+

+ + +

+

+ +

+

1µF

47µF

220µF

4.7µF

100µF

8.2kΩ

100kΩ

1µF

300Ω

8.2kΩ

100kΩ

1µF

470kΩ

220µF

4.7µF

100µF

16kΩ

2.2kΩ

680Ω

10µF

10kΩ

300Ω

10kΩ

2

S3

1

VIN1

VNF1V

NFS

1 VO1

2

1

1 2

2

S5

S6

MIC IN

S7

S8

1

1 2

2 1 2 1

1

2/2

1/2

2/2

A

7

18

LA3241

ILA00604

Top view

No. 2564-5/15

LA3241

Sample Application Circuit

23

100kΩ

22 21

20

19

18

17 15 14

13

1 2 3 4 5 6 7 8 10 12

+

+ +

+

bias

Z3

Z2

Z1

ILA00605

SW(10)

Level select

V

CC

V

CC

V

CC

100µF

4.7µF

47µF

0.7V OFF

0.46V ON

100µF

PB Amp IN

8.2kΩ

300Ω

radio OUT

100kΩ

10kΩ

1µF

bias

Z3

Z2

Z1

V

CC

47µF

PB Amp IN

8.2kΩ

470kΩ

10kΩ

680Ω

300Ω

1µF

V

CC

4.7µF

10µF

100µF

MIC

SW(9)

+

+ +

++

9

16

3.6kΩ

50kΩ

10kΩ

50kΩ

+

--

preamp1

preamp2

ALC

RF

SBD

Me / Not SW

SBD

Nor / High

Speed

MIC

24

11

Top view

(Notes)

1. The electronic select switch level is approximately (VCC–0.9)/2.

2. REC amplifier NF parameters Z1 through Z3 should be selected to accommodate the recording level and frequency response that will be required in metal/normal tape and normal/higher speed modes.

3. Z1 through Z3 may be configured with coil “L”, capacitor “C”, and resistor “R”.

4. The electronic select switch mode illustrated above shown no VCCbeing impressed on Me/Nor SW⑨ or Nor/High SW⑩.

5. The ALC level on pin 7 should not be changed over while VCCis impressed.

Usage Notes

No. 2564-6/15

LA3241

(1) Input pins 1 and 24 have internal resistors of 3.6 kΩ (typical) inserted.

50kΩ

3.6kΩC

ILA00607

24

1

When applying external voltages to input pins 1 and 24, insert capacitors in the input. We recommend capacitances in the range

0.1 to 10 µF. The DC voltage V

IN DC

when pins 1 or 24 is left

open will be 50 mV or lower. (V

IN DC

= 20 mV typical)

See the VCC– V

IN DC

Characteristics for the supply voltage V

CC

and V

IN DC

characteristics.

(2) Output waveform starting time

ILA00608

SW

200Ω

3kΩ

Cr

V

CC

+

ILA00609

VCC on

t

s

When the supply voltage VCCis applied, the amplifier outputs (pins 6 and 19) start up. The output waveform turn-on time, ts, can be modified by adding the capacitor Cr to pin 12. The minimum value for Cr is 33 µF. Values smaller than this will aggravate the power-on impulse noise and degrade the ripple rejection ratio. At Cr = 100 µF, ts will be

0.7 s, typical.

(3) Electronic switch control circuit

ILA00610

V

CC

4µAmin

300µA

1kΩ

100Ω

200Ω

R1=R2

R2

3kΩ

0.9V

R1

+

--

~

--

~

--

~

14

13

9

16

The control pin (pins 9 and 16) switching circuit has the structure shown in the figure. The control circuit switching level, V

CONT

, is given by the following formula.

V

CONT

= 1/2 × (VCC– 0.9) [V]

No. 2564-7/15

LA3241

(4) Relationship between the electronic switch on and off control voltage levels and the power supply voltage

(See VCC– V

CONT

for the data.)

Pin9,16(V)

VCC(V)

V

CONT

ILA00611

When the supply voltage VCCis determined, the corresponding electronic switch control pin (pins 9 and 16) control levels will be determined. There is a threshold area of about 1 V. The center point of the threshold area for a given supply voltage VCCwill be roughly:

1/2 × (VCC– 0.9) [V] Therefore, the electronic switches can be turned on and off

reliably by applying voltages that are at least ±0.5 V of this center point voltage to the electronic switch control pins (pins 9 and 16).

(5) Add a 470 pF capacitor between pin 15 and ground to prevent oscillation at low temperature in the microphone

amplifier output.

ILA00612

input

50kΩ

10kΩ

output

470pF

+

--

11 10

15

(6) The ALC switching level can be implemented with pin 7. The IC supply voltage VCCmust be turned off temporarily

when switching to prevent ALC failure.

50Ω

SBD × 4

ALC Drive

50Ω

TR2

TR1

ILA00613

18

7

8 17

(7) Although the ALC level is converted by opening (0.7 V) or shorting (0.46 V) pin 17, basically, the ALC start DC

threshold level is switched by turning transistor TR2 on (pin 17 open) or off (pin 17 shorted).

Rectifier Block Equivalent Circuit

No. 2564-8/15

LA3241

LA3241 and LA3246 Cassette Dubbing System Circuit Example

Radio

10k

Ω

10

µ

F

100

µ

F

100

µ

F

100k

Ω

47

µ

F

47

µ

F

Pre a 2

Mix 0dB

Pre a 1

R2

F2

P

F1

R1

180

Ω

100k

Ω

4.7

µ

F

0.01µF

2k

Ω

300k

Ω

Tape A

300k

Ω

Tape

PB

1

µ

F

8.2k

Ω

4.7

µ

F

4.7µF

RF

10k

Ω

100k

Ω

10k

Ω

50k

Ω

10k

Ω

100

µ

F

0.46V

0.7V

on

300

Ω

47

µ

F

50k

Ω

50k

Ω

8.2k

Ω

470k

Ω

50k

Ω

47

µ

F

PB REC

V

CC

4.7

µ

F

10

µ

F

4.7

µ

F

1

µ

F

ALC Met

ECM

ILA00614

Nor

off on

100

µ

F

100k

Ω

680

Ω

1µF

300

Ω

3.6k

Ω

1µF

50k

Ω

ALC

off

ALC

REC

V

CC

Bias

PB

R / P

TapeB

PB

3.6k

Ω

Pre a 2

Pre a 1

REC

Radio

Dubbing

High / Nor

LA2000

Level Sensor

Nor High

180

Ω

0.01µF

12k

Ω

2.7k

Ω

0.047µF

47

µ

F

4.7

µ

F

4.7

µ

F

18k

Ω

12k

Ω

10k

Ω

4.7

µ

F

10k

Ω

100k

Ω

2.7k

Ω

0.047µF

PB

Tape

Radio

Dubbing

LA3246

F / R

F

R

Met / Nor

Nor / High

Speed

Nor / High

Speed

LA3241

MIC

Met / Nor

on

18k

Ω

12k

Ω

off

Nor Met

V

CC

IFout=10mA max

VO=V

CC

--1(V

)

V

CC

REC

LA4505

SP

L

R

SP

20 19 18 17 16 15 14 13 12 11

10

1

24 23 22 21 20 19 18 17 15 1314

1 2 3 4 5 6 8 9 10 1211

2 3 4 5 6 7 8 9

1/2

--

+

V

O

+

+ +

+

×

+

--

7

Bias

16

No. 2564-9/15

LA3241

VO ALC — Ta

VO max — Ta

ILA00619

ILA00621

VGO, VG — f

i

ILA00622

0

3.0

2.0

1.0

5.0

4.0

0

0.6

0.4

0.2

1.0

0.8

VO max — Ta

ILA00617

--20 0 20 40 60 80 100

0

1.0

0.8

0.2

0.6

0.4

0.8

1.0

1.2

1.4

1.6

0.6

0

0.4

0.2

1.4

1.2

20

18

20

22

24

26

28

30

80

90

70

60

50

40

30

--20 0 20 40 60 80 100

2 3 5

100

2 3 5

1k

2 3 5

10k

2 3 5

100k

--20 0 20 40 60 80 100

VO ALC — Ta

VO max — Ta

VG — Ta

ILA00618

I

CCO

— Ta

ILA00616

ILA00615

40 60 80200--20 100

0

10

6

8

2

4

20

18

16

12

38

44

42

40

50

48

46

14

40--20 0 20 10060 80

Rg=3.6kΩ VI=0

4.5V

6.0V

9.0V

12.0V

V

CC

=16.0V

REC AMP VO=0dBm fi=1kHz

REC AMP THD=1% fi=1kHz

REC AMP 17short 0.42V

REC AMP 17short 0.65V

VCC=6.0V VO=0dBm

MIC AMP THD=1% fi=1kHz

12.0V

9.0V

6.0V

4.5V

12.0V

4.5V

9.0, 6.0V

6.0V

9.0V

V

CC

=16.0V

VCC=16.0V

V

CC

=16.0V, 12.0V

6.0V

4.5V

V

CC

=16.0V

ILA00620

MIC AMP VO=0dBm fi=1kHz

9.0V

6.0V

V

CC

=16.0V

4.5V

12.0V

CNF=220µF

Me / Nor & Nor / High SW on

Nor / High & Me / Nor SW off

With either the Me/Nor or the Nor/High switch on

VCC=4.5V

6.0V

9.0V

12.0V

16.0V

12.0V

9.0V

Ambient temperature, Ta — °C

Maximum output voltage, V

O

max — V

Voltage gain (open circuit), VG

O

— dB

Voltage gain (closed circuit), VG — dB

Input frequency, fi — Hz

Ambient temperature, Ta — °C

Quiescent current, I

CCO

— mA

Voltage gain (closed circuit), VG — dB

Ambient temperature, Ta — °C

Maximum output voltage, V

O

max — V

ALC output voltage, V

O

ALC — V

ALC output voltage, V

O

ALC — V

Maximum output voltage, V

O

max — V

No. 2564-10/15

LA3241

0

90

80

70

60

50

40

10

20

30

40

50

60

0

2 4 6 8 10 12 14 16 18

2 4 6 8 10 12 14 16

ILA00625

VG — V

CC

CT — V

CC

0

5

10

15

20

25

0 2 4 6 8 10 12 14 16 18 20

ILA00624

I

CCO

, I

CCS

— V

CC

ILA00627

VGO, VG — f

i

ILA00623

10

20

30

40

50

60

70

80

90

2 3 5

100

2 3 5

1k

2 3 5

10k

2 3 5

100k

MIC AMP VCC=6.0V VO=0dBm

CNF=220µF

RNF=680Ω

VO= --10dBm

2kΩ

f=1kHz ALC off

Input frequency f=1kHz Rg=3.6k

Ω

Rg=3.6kΩ

Nor / High & Me / Nor SW on

Nor / High & Me / Nor SW off

Me / Nor SW on

Nor / High SW on

ILA00626

--90 --80 --70 --60 --50 --40 --30 --20

10

2

3

5

2

3

5

0.1

3

5

1.0

2

0.01

3

5

2

VO, THD — V

I

ILA00628

0 2 4 6 8 10 12 14 16 18 20

0

1.0

2.0

3.0

4.0

VO max — V

CC

THD=1% f=1kHz RL=10k

Ω

f=1kHz VCC=6.0V RL=10kΩ

ILA00629

--60 --50 --40 --30 --20 --10 0 10 20

100

2

3

5

2

3

5

1.0

3

5

10

2

0.1

3

5 2

VO ALC, THD — V

I

THD

V

O

ALC

Pin 17: ground VCC=4.5V RL=10kΩ Rg=3.6kΩ

ILA00630

--60 --50 --40 --30 --20 --10 0 10 20

100

2

3

5

2

3

5

1.0

3

5

10

2

0.1

3

5 2

VO ALC, THD — V

I

THD

V

O

ALC

Pin 17: open VCC=4.5V RL=10kΩ Rg=3.6kΩ

CH2→CH1

CH1→CH2

THD

Me / Nor & Nor / High Speed SW off

VGO

0dBm

V

O

Input voltage, VI— dBm

Input voltage, V

I

— dBm

Supply voltage, VCC— V

Input frequency, fi — Hz

Quiescent current, I

CCO

— mA

Quiescent current (with the electronic switch on), I

CCS

— mA

Supply voltage, VCC— V

Input voltage, V

I

— dB

Supply voltage, V

CC

— V

Supply voltage, V

CC

— V

Voltage gain, VG — dB

Crosstalk, CT — dB

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Maximum output voltage, V

O

max — V

Voltage gain (open circuit), VG

O

— dB

Voltage gain (closed circuit), VG — dB

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

No. 2564-11/15

LA3241

ILA00631

--70 --40--50--60 --30 --20 --10 200 10

100

2

3

5

2

3

5

1.0

3

5

10

2

0.1

3

5 2

VO ALC, THD — V

I

ILA00633

--70 --40--50--60 --30 --20 --10 200 10

100

2

3

5

2

3

5

1.0

3

5

10

2

0.1

3

5

2

VO ALC, THD — V

I

Pin 17: ground Nor / High, Me / Nor on VCC=6V RL=10kΩ Rg=3.6kΩ

Pin 17: open Nor / High, Me / Nor on VCC=6V RL=10kΩ Rg=3.6kΩ

2

THD

V

O

ALC

THD

V

O

ALC

THD

ILA00632

--60 --30--40--50 --20 --10 0 10 20

0.1 7

3

5

2

1.0 7

3

5

2

10

7

3

5

2

VO ALC, THD — V

I

ILA00634

--60 --30--40--50 --20 --10 0 10 20

0.1 7

3

5

2

1.0 7

3

5

2

10

7

3

5

2

VO ALC, THD — V

I

Pin 17: open VCC=6V f=1kHz RL=10kΩ Rg=3.6kΩ

V

O

ALC

THD

V

O

ALC

ILA00635

--60 --40--50 --30 --20 --10 200 10

5

2

3

10

5

2

3

1.0 5

2

3

0.1 5

3

VO ALC, THD — V

I

Pin 17: ground Nor / High, Me / Nor on VCC=9V RL=10kΩ Rg=3.6kΩ

ILA00636

--60 --40--50 --30 --20 --10 200 10

5

2

3

10

5

2

3

1.0 5

2

3

0.1 5

3 2

VO ALC, THD — V

I

Pin 17: open Nor / High, Me / Nor on VCC=9V RL=10kΩ Rg=3.6kΩ

ILA00637

--60 --40--50 --30 --20 --10 200 10

5

2

3

10

5

2

3

1.0 5

2

3

0.1 5

3 2

2

VO ALC, THD — V

I

Pin 17: open Nor / High, Me / Nor on VCC=12V RL=10kΩ Rg=3.6kΩ

ILA00638

--60 --40--50 --30 --20 --10 200 10

5

2

3

10

5

2

3

1.0 5

2

3

0.1 5

3

VO ALC, THD — V

I

Pin 17: ground Nor / High, Me / Nor on VCC=12V RL=10kΩ Rg=3.6kΩ

V

O

ALC

THD

V

O

ALC

THD

V

O

ALC

THD

V

O

ALC

Pin 17: ground VCC=6V f=1kHz RL=10kΩ Rg=3.6kΩ

Input voltage, VI— dBm

Input voltage, V

I

— dBm

Input voltage, VI— dBm

Input voltage, V

I

— dBm

Input voltage, V

I

— dBm

Input voltage, V

I

— dBm

Input voltage, V

I

— dBm

Input voltage, V

I

— dBm

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Output voltage, V

O

— V

Total harmonic distortion, THD — %

No. 2564-12/15

LA3241

ILA00642

0 2 4 6 8 10 12 14 16 18 20

3

2

3

5

7

1000

2

100

VNO — V

CC

3

1

2

0

--1

--2

--3

10

7 5

2

1.0

3

7 5

3 2

0 642 8 1210 14 16

ILA00639

0 642 8 1210 18 2014 16

ILA00641

VO ALC — V

CC

VI= --40dBm VO ALC=0.44V=0dB f=1kHz Rg=3.6kΩ

VNI — V

CC

3

1

2

0

--1

--2

--3

0 642 8 1210 14 16

ILA00640

VO ALC — V

CC

VI= --40dBm VO ALC=0.66V=0dB f=1kHz Rg=3.6kΩ

1.4

1.0

1.2

0.8

0.6

0.2

0.4

0

0 642 8 1210 14 16

ILA00646

VO max — V

CC

Rg=3.6kΩ VG=45dB=177 (VCC=6V) f=1kHz

10000

5

7

3 2

7 5

3 2

1000

100

7 5

3 2 100

532

1k

32 2 535

10k

2 3

100k

5

ILA00643

VNO — Rg

V

NO

(FLAT)

V

NO

(DIN)

REC AMP Rg=3.6kΩ RL=10kΩ f=1kHz

ILA00644

100 1k 10k

2 3 5 2 3 5 2 3 5

100k

2 3 5

100 1k 10k

32 5 7 32 5 7 2 3 5 7 2 3

10

5

7

1.0

2

3

5

3 2

VNI — Rg

REC AMP VCC=6V f=1kHz

V

NO

(DIN)

V

NO

(FLAT)

MIC AMP f=1kHz THD=1% RL=10kΩ

1.4

1.0

1.2

0.8

0.6

0.2

0.4

0

ILA00645

VO max — R

L

VCC=6V f=1kHz

REC AMP VCC=6V f=1kHz THD=1%

V

O

max

V

O

max

V

NI

Load resistance, RL— Ω

Maximum output voltage, V

O

max — V

Maximum output voltage, V

O

max — V

Supply voltage, VCC— V

Supply voltage, V

CC

— V

ALC output voltage, V

O

ALC — V

ALC output voltage, V

O

ALC — V

Supply voltage, VCC— V

Supply voltage, V

CC

— V

Input signal source resistance, Rg — Ω

Equivalent input noise voltage, V

NI

— µV

Output noise voltage, V

NO

— µV

Output noise voltage, V

NO

— µV

Equivalent input noise voltage, V

NI

— µV

No. 2564-13/15

LA3241

ILA00650

VNO — V

CC

5 3

7 5

3

2

1.0

2

0.1 7 5

3 2

0.01

10

7 5

2

1.0

3

7 5

3 2

--60 --50 --40 --30 --20 --10

ILA00647

ILA00649

VO, THD — V

I

VNI — V

CC

32

24

28

20

16

12

8

0

4

0 642 8 1210 14 16

ILA00648

VG — V

CC

2 4 6 8 10 12 14 16 18 20

1000

7 5

3 2

100

10

7 5

3 2

30

40

50

60

70

80

2 53

100

532 32

100k

5

1k

32 5

10k

2 53

100

532 32

100k

5

1k

3

2 5

10k

2 53

100

532 32

100k

5

1k

32 5

10k

2 53

100

532 32

100k

5

1k

32 5

10k

ILA00651

ILA00653

ILA00652

VNO — Rg

CT — f

i

10

7

1.0 7

5

3

2

5

3 2

VNI — Rg

CT — f

i

MIC AMP f=1kHz VCC=6V RL=10kΩ

V

O

THD

MIC AMP f=1kHz RL=10kΩ VO=0dBm

VG

V

NI

(DIN)

MIC AMP Rg=2.2kΩ RL=10kΩ

2 4 6 8 10 12 14 16 18 20

10

7

3

5

2

100

7

3

5

2

1000

7

3

5

2

V

NO

(FLAT)

V

NO

(DIN)

MIC AMP VCC=6V f=1kHz RL=10kΩ

V

NO

(FLAT)

V

NO

(DIN)

ILA00654

20

30

40

50

60

70

80

90

MIC AMP→REC AMP VCC=6V VO=0dBm(MIC OUT) Rg=3.6kΩ

V

NI

MIC AMP

REC AMP2

REC AMP1

REC AMP2

MIC AMP VCC=6V VG=26dB RL=10kΩ

MIC AMP REC AMP2

VCC=6V VO1=0dBm Rg=3.6kΩ *ALC off

REC AMP1→

Input frequency, fi— Hz

Crosstalk, CT — dB

Input frequency, fi— Hz

Supply voltage, VCC— V

Input voltage, V

I

— dBm

Output voltage, V

O

— V

Total harmonic distortion, THD — %

Voltage gain, VG — dB

Supply voltage, VCC— V

Supply voltage, V

CC

— V

Input signal source resistance, Rg — Ω

Equivalent input noise voltage, V

NI

— µV

Output noise voltage, V

NO

— µV

Output noise voltage, V

NO

— µV

Equivalent input noise voltage, V

NI

— µV

No. 2564-14/15

LA3241

CT — f

i

ILA00655

30

40

50

60

70

80

90

MIC AMP

MIC AMP REC AMP2

VCC=6V VI= --40dBm (REC AMP1) Rg=3.6kΩ *ALC on (0.42V 17short)

REC AMP1→

Me / Nor on, Nor / High on REC AMP2

Me / Nor off, Nor / High off REC AMP2

CT — f

i

ILA00656

30

40

50

60

70

80

90

MIC AMP

MIC AMP REC AMP2

VCC=6V VI= --40dBm (REC AMP1) Rg=3.6kΩ *ALC on (0.65V 17open)

REC AMP1→

Me / Nor off, Nor / High off REC AMP2

2 53

100

532 32

100k

5

1k

32 5

10k

2 53

100

532 32

100k

5

1k

32 5

10k

2 53

100

532 32

100k

5

1k

32 5

10k

CT — f

i

ILA00657

30

40

50

60

70

80

90

MIC AMP

REC AMP1

MIC AMP REC AMP1

VCC=6V VO=0dBm Rg=3.6kΩ *ALC off

REC AMP2→

2 53

100

532 32

100k

5

1k

32 5

10k

CT — f

i

ILA00659

20

30

40

50

60

70

80

90

MIC AMP REC AMP1

REC AMP2→

2 53

100

532 32

100k

5

1k

32 5

10k

2 3 5

1.0 10

32

1000

552 3

100

CT — f

i

ILA00658

Rr — V

CC

Rr — Cr

ILA00660

30

2 4 6 8 10 12 14 16 18

ILA00662

--60

--50

--40

--30

--20

--10

--50

--40

--30

--20

--10

40

50

60

70

80

90

MIC AMP

MIC AMP REC AMP

REC AMP2→

VCC=6V VI= --40dBm (REC AMP2) Rg=3.6kΩ *ALC on (0.42V 17short)

Me / Nor off, Nor / High off REC AMP1

Me / Nor on, Nor / High on REC AMP1

VCC=6V VI= --40dBm (REC AMP2) Rg=3.6kΩ *ALC on (0.65V 17open)

MIC AMP

Me / Nor on, Nor / High on REC AMP1

Me / Nor off, Nor /

High off REC AMP1

VR= --20dBm f=100Hz CR ???

REC AMP

MIC AMP

2 53

100

532 32

100k

5

1k

325

10k

Rr — f

r

ILA00661

--60

--50

--40

--30

--20

--10

0

10

20

MIC AMP

REC AMP

VCC=6V fr=100Hz VR= --20dBm

REC

MIC

Me / Nor on, Nor / High on REC AMP2

VCC=6V VR= --20dBm No C

R

Ripple frequency, fr— Hz

Ripple rejection ratio, Rr — dB

Ripple filter capacitor, Cr — µF

Input frequency, fi— Hz

Input frequency, f

i

— Hz

Crosstalk, CT — dB

Input frequency, fi— Hz

Input frequency, f

i

— Hz

Supply voltage, V

CC

— V

Input frequency, f

i

— Hz

Crosstalk, CT — dB

Ripple rejection ratio, Rr — dB

Crosstalk, CT — dB

PS No. 2564-15/15

LA3241

This catalog provides information as of February, 2002. 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.

Sanyo LA3241 Specifications

Specifications and Main Features

Frequently Asked Questions

User Manual