ENN2564B
Ordering number : ENN2564B
Monolithic Linear IC
LA3241
Preamplifier for
Compact Cassette Recording-Only Use
Overview
Package Dimensions
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.
unit: mm
3067A-DIP24S
[LA3241]
21.0
Applications
24
13
Features
1
12
(3.25)
(0.71)
1.78
0.48
3.3 3.9max
0.9
0.51min
• 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.
0.25
7.62
6.4
• Radio-cassette tape recorder/tape deck-use stereo
compact cassette player.
0.95
SANYO: DIP24S (300 mil)
Functions
•
•
•
•
Recording preamp
Mike amp
ALC
Electronic switch
×2
×1
×1
×6
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum Supply Voltage
Allowable Power Dissipation
Symbol
Conditions
Ratings
Unit
VCC max
16
V
Pd max
720
mW
Operating Temperature
Topr
–20 to +75
°C
Storage Temperature
Tstg
–40 to +125
°C
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22502TN (OT)/10700TH (KT)/O147TA, TS No. 2564-1/15
LA3241
Recommended Operating Conditions at Ta = 25°C
Parameter
Recommended Supply Voltage
Operating Voltage range
Symbol
Conditions
Ratings
VCC
VCC op
Unit
6
V
4.5 to 14.0
V
Operating Characteristics at Ta = 25°C, VCC = 6 V, RL = 10kΩ, f = 1 kHz, 0dB = 0.775 V
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
Quiescent Current
ICCO
Me/Nor, Nor/High SW off
5
7.5
12
mA
Quiescent Current
ICCS
Me/Nor, Nor/High SW on
10
15
20
mA
[REC Amp]
Voltage Gain (Open)
VGO1
Voltage Gain (Closed)
VG1
VO=0dBm
Total Harmonic Distortion
THD1
VO=0.4V
Maximum Output Voltage
VO max
THD=1%
Equivalent Input Noise Voltage
Input Resistance
Crosstalk
Channel Balance
VNI1
75
85
41.5
43.5
46.0
dB
0.1
0.7
%
1.2
1.8
µV
60
kΩ
0.7
Rg=2.2kW, BPF : 20Hz to 20kHz
Ri1
dB
1.0
V
40
50
CT1
Between REC amps
50
70
dB
CT2
REC amp → Mike amp
60
80
dB
CB
Vi=–50dBm
0
2
dB
[Mike Amp]
Voltage Gain
VGO2
Voltage Gain
VG2
VO=0dBm
Total Harmonic Distortion
THD2
VO=0.4V
Maximum Output Voltage
VO2
THD=1%
Equivalent Input Noise Voltage
VNI2
Rg=2.2kΩ, BPF : 20Hz to 20kHz
40
50
23
25
27
0.1
0.7
0.8
dB
1.1
dB
V
V
1.2
1.7
µV
40
50
60
kΩ
Mike amp → REC amp
45
60
dB
ALCW
Input range when output distortion becomes
1% aftrer ALC begins to be applied.
45
55
dB
ALCB
Output difference between CH1 and CH2.
Input Resistance
Ri2
Crosstalk
CT3
[ALC]
ALC Range
ALC Balance
ALC Distortion
ALC Output Voltage
Crosstalk
ALCTHD
Vi=–40dBm
0
2
dB
0.15
0.80
%
V
Vi=–40dBm, pin 17 Gnd
0.37
0.46
0.57
Vi=–40dBm, pin 17 open
0.6
0.7
0.85
CT4
Between REC amps
45
60
dB
CT5
REC amp → Mike amp
50
70
dB
ALCVo
V
[Switch]
On-State Resistance
RON
DC Feedback Resistance
RF1
40
30
70
Ω
50
60
kΩ
No. 2564-2/15
LA3241
Equivalent Circuit Block Diagram
IN2
NF2
24
23
Nor / High Me / Nor Me / Nor
OUT2
OUT2-1 OUT2-2 OUT2
22
20
21
ALC
IN2
ALC Nor / High
CONT
SW
17
18
19
MIC
OUT
RFC
VCC
15
14
13
16
R
F
-+
Nor / High
Speed
preamp2
10kΩ
50kΩ
50kΩ
ALC
preamp1
50kΩ
+
3.6kΩ
--
SBD
Me / Nor SW
50kΩ
1
2
IN1
NF1
MIC+
--
50kΩ
3.6kΩ
SBD
3
4
5
Nor / High Me / Nor Me / Nor
OUT1
OUT1-1 OUT1-2
6
7
8
9
10
11
12
OUT1
ALC
IN1
ALC
Me / Nor
SW
MIC
NF
MIC
IN
GND
Top view
ILA00602
Equivalent Circuit
23
22
21
20
19
18 17
16
15
14
13
50kΩ
3.6kΩ
24
D4 D5
TR17
100Ω
VR2
TR13
High
Speed
Charge
50kΩ
TR18
TR16
TR15
TR14
10kΩ
TR12
TR6
TR1
10kΩ
10kΩ
50Ω
50kΩ
100Ω
D2 D1
TR2
50Ω
TR7
TR5
VR1
TR8
50kΩ
TR9
TR11
TR9
3.6kΩ
1
2
3
4
5
6
7
8
9
TR10
50kΩ
TR4
~
-- 100µA
TR3
10
11
12
ILA00603
No. 2564-3/15
LA3241
Test Circuit Diagram
VO2
24
23
10kΩ
2
22
21
+
+
A
100µF
8.2kΩ
4.7µF 10kΩ
1µF
+
+
+
100kΩ +
20
19
18
17
16
15
S11
14
13
21
+
10
11
VCC
GND
12
+
+
1 2 S7
S6
2.2kΩ
1µF
+
8.2kΩ
S5
1
2
S4 1/2
1
S10 1
ICC
100kΩ
+
220µF
+
470kΩ
+
9
680Ω
10µF
8
16kΩ
7
4.7µF
6
100µF
5
300Ω
300Ω
4
10kΩ
2
1
3
300Ω
+
300Ω 47µF
1µF
1/2
VIN1
+
1
2
220µF
S13
2
2
2
LA3241
1
1
2
10kΩ
4.7µF
1
4.7µF
+
300Ω
+
300Ω
1
1µF
2/2
300Ω
S3
1
47µF
300Ω
2
S1
S9
SW4 2/2
1
2
S14 2
MIC OUT
100µF
VNF2VNFS2
S8
2 1 21
MIC IN
VNF1VNFS1
VO1
Top view
ILA00604
No. 2564-4/15
LA3241
Sample Application Circuit
PB Amp IN
1µF 8.2kΩ
+
bias
SW(10)
Z3
23
24
Z2
22
21
20
19
+
0.7V
OFF
100kΩ
15
14
3.6kΩ
50kΩ
13
RF
SBD
SBD
50kΩ
+
+
16
17
18
10kΩ
0.46V
ON
VCC
100µF
radio
OUT +
Z1
radio
OUT
+
VCC
4.7µF
4.7µF
300Ω
+
47µF
+
Level select
100µF
VCC
Nor / High
Speed
-preamp2
10kΩ
+
ALC
50kΩ
50kΩ
+
--
MIC
preamp1
3.6kΩ
SBD
Me / Not SW
50kΩ
SBD
1µF
+
bias
11
VCC
SW(9)
12
680Ω 10µF
+
10kΩ
100µF
+
9
10
100kΩ
+
300Ω
+
8
4.7µF
7
470kΩ
6
4.7µF
5
Z3
4
Z2
+
PB Amp IN
3
Z1
2
47µF
1
MIC
Top view
8.2kΩ
VCC
ILA00605
(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 VCC being impressed on Me/Nor SW⑨ or Nor/High
SW⑩.
5. The ALC level on pin 7 should not be changed over while VCC is impressed.
No. 2564-5/15
LA3241
Usage Notes
(1) Input pins 1 and 24 have internal resistors of 3.6 kΩ (typical) inserted.
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 VIN DC when pins 1 or 24 is left
open will be 50 mV or lower.
C
(VIN DC = 20 mV typical)
3.6kΩ
1
See the VCC – VIN DC Characteristics for the supply voltage VCC
and VIN DC characteristics.
50kΩ
24
ILA00607
SW
200Ω
3kΩ
(2) Output waveform starting time
VCC
Cr
VCC on
+
ts
ILA00609
ILA00608
When the supply voltage VCC is 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
~
-- 0.9V
R1
1kΩ
100Ω
1kΩ
16
VCONT = 1/2 × (VCC – 0.9) [V]
14
200Ω
9
R1=R2
+
R2
~
-- 4µAmin
VCC
3kΩ
13
The control pin (pins 9 and 16) switching circuit has the
structure shown in the figure. The control circuit switching
level, VCONT, is given by the following formula.
~
-- 300µA
ILA00610
No. 2564-6/15
LA3241
(4) Relationship between the electronic switch on and off control voltage levels and the power supply voltage
(See VCC – VCONT for the data.)
Pin9,16(V)
When the supply voltage VCC is 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 VCC will be
roughly:
VCONT
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).
VCC(V)
ILA00611
input
50kΩ
(5) Add a 470 pF capacitor between pin 15 and ground to prevent oscillation at low temperature in the microphone
amplifier output.
11
+
10
--
output
+
470pF
15
10kΩ
ILA00612
(6) The ALC switching level can be implemented with pin 7. The IC supply voltage VCC must be turned off temporarily
when switching to prevent ALC failure.
ALC Drive
SBD × 4
50Ω
TR1
50Ω
18
7
TR2
8
17
ILA00613
Rectifier Block Equivalent Circuit
(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).
No. 2564-7/15
LA3241
LA3241 and LA3246 Cassette Dubbing System Circuit Example
L
LA4505
Radio
R
1/2
SP
1/2
Radio
SP
Tape
PB REC
Dubbing
R2
18
2.7kΩ
17
16
15
14
+
13
100µF
10kΩ
2kΩ
+
VCC
0.047µF
100kΩ
300kΩ
+-- Pre a
2
F2
+
IFout=10mA max
VO=VCC --1(V)
Met
12
11
Mix
0dB
4
180Ω
6
7
8
10
9
2.7kΩ
100kΩ 0.047µF
12kΩ
47µF
+
Tape A
5
12kΩ
18kΩ +
+
100kΩ
+
+
10kΩ
0.01µF
4.7µF
3
F/R
10kΩ
2
4.7µF
Nor High
Tape Radio
LA2000
Level
Sensor
on
+
22
21
20
19
18
100kΩ
16
15
17
Pre a 2
50kΩ
4
5
7
6
300Ω
+
TapeB
4.7µF
1µF
8
9
+
100µF
3
Met / Nor
4.7µF
47µF
R/P
2
+
10
100kΩ
+
+
PB REC
1µF
11
+
12
ECM
8.2kΩ
+
Bias
LA3241
Pre a 1
470kΩ
50kΩ
3.6kΩ
1
+
--
MIC
50kΩ
50kΩ
Nor / High
Speed
ALC
+
13
RF
50kΩ
-+
+
14
10µF 680Ω
23
3.6kΩ
24
+
4.7µF
0.46V
10kΩ
PB REC
1µF
+
47µF
+
High / Nor
10kΩ
TapeB
300Ω
4.7µF
8.2kΩ
PB REC
+
off
Dubbing
ALC VO
0.7V
100µF
PB REC
10kΩ
VCC
Bias
R/P
R
F
1µF
1
P
LA3246
Nor / High
Speed
4.7µF
R1
VCC
Met / Nor
+
Pre a
-- 1
300kΩ
F1
+
100µF
19
Nor
12kΩ
0.01µF
20
+
47µF
18kΩ
off
10µF
Tape A
4.7µF
180Ω
+
47µF
P
on
off on
ALC
Met Nor
VCC
×
PB REC
ILA00614
No. 2564-8/15
LA3241
ICCO — Ta
VCC =1
6.0V
14
12.0V
12
9.0V
10
6.0V
8
4.5V
6
4
2
0
20
40
60
80
Ambient temperature, Ta — °C
V
9.0V
6.0V
1.0
4.5V
0
--20
0
20
40
60
80
Ambient temperature, Ta — °C
ALC output voltage, VO ALC — V
1.0
6.0V
4.5V
0.6
9.0V
12.0
V
VCC=16.0V
0.4
0.2
0
20
40
60
80
Ambient temperature, Ta — °C
Maximum output voltage, VO max — V
1.4
1.2
0.6
V
0.8
4.5V
0.6
0.4
0.2
0
20
40
60
Ambient temperature, Ta — °C
80
100
ILA00621
100
ILA00616
0.2
0
20
40
60
80
100
ILA00618
VO max — Ta
30
MIC AMP
VO=0dBm
fi=1kHz
28
12.0V
26
6.0V
V CC=1
4.5V
24
6.0V
9.0V
22
20
18
--20
0
20
40
60
80
Ambient temperature, Ta — °C
100
ILA00620
VGO, VG — fi
90
V, 12.0
V
80
0.4
ILA00619
VC =
C 16.0
9.0, 6.0
1.0
60
Ambient temperature, Ta — °C
100
MIC AMP
THD=1%
fi=1kHz
40
VCC=4.5V
6.0V
9.0V
12.0V
16.0V
0
--20
VO max — Ta
1.6
20
VO ALC — Ta
ILA00617
1.2
0
--20
0.8
100
REC AMP
17short 0.65V
0.8
0
REC AMP
17short 0.42V
VO ALC — Ta
1.4
0
--20
40
Ambient temperature, Ta — °C
ALC output voltage, VO ALC — V
.0
6
=1
C
Maximum output voltage, VO max — V
VC
2.0
12.0V
6.0V
V
4.5
42
1.0
4.0
3.0
V
=16.0
VCC
44
ILA00615
REC AMP
THD=1%
fi=1kHz
9.0V
12.0V
46
38
--20
100
VO max — Ta
5.0
REC AMP
VO=0dBm
fi=1kHz
48
Maximum output voltage, VO max — V
0
--20
Voltage gain (open circuit), VGO — dB
Voltage gain (closed circuit), VG — dB
Quiescent current, ICCO — mA
18
16
VG — Ta
50
Rg=3.6kΩ
VI=0
Voltage gain (closed circuit), VG — dB
20
VCC=6.0V
VO=0dBm
CNF=220µF
80
70
60
Me / Nor & Nor / High SW on
50
With either the Me/Nor or the Nor/High switch on
40
Nor / High & Me / Nor SW off
30
20
2
3
5
100
2 3
5
1k
2
3
5
10k
Input frequency, fi — Hz
2 3
5 100k
ILA00622
No. 2564-9/15
VGO, VG — fi
80
MIC AMP
VCC=6.0V
VO=0dBm
CNF=220µF
70
VG
O
60
50
40
30
RNF=680Ω
2kΩ
20
10
2
3
5
2 3
100
5
2 3
1k
5
10k
Input frequency, fi — Hz
2
3
5
100k
ILA00623
VG — VCC
60
f=1kHz
ALC off
VO= --10dBm
40
0dBm
Voltage gain, VG — dB
50
30
20
0
2
4
6
8
10
12
Supply voltage, VCC — V
10
5
0
0
2
4
6
8
10
12
14
16
18
20
ILA00624
VO, THD — VI
f=1kHz
VCC=6.0V
RL=10kΩ
3
2
1.0
TH
D
5
3
2
0.1
VO
5
3
2
5
3
2
--90
16
CH1→CH2
60
Me / Nor & Nor / High Speed SW off
--80
--70
CH2→CH1
70
80
--60
--50
--40
--30
Input voltage, VI — dB
ILA00625
90
--20
ILA00626
VO max — VCC
4.0
Maximum output voltage, VO max — V
Crosstalk, CT — dB
14
Input frequency
f=1kHz
Rg=3.6kΩ
50
THD=1%
f=1kHz
RL=10kΩ
3.0
2.0
1.0
0
2
4
6
8
10
12
14
Supply voltage, VCC — V
16
18
0
100
5
3
2
VO ALC
5
3
2
THD
0.1
5
3
2
--60
--50
--40
--30
--20
--10
Input voltage, VI — dBm
4
6
0
10
20
ILA00629
8
10
12
14
16
Supply voltage, VCC — V
VO ALC, THD — VI
Pin 17: ground
VCC=4.5V
RL=10kΩ
Rg=3.6kΩ
1.0
2
ILA00627
Output voltage, VO — V
Total harmonic distortion, THD — %
Output voltage, VO — V
Total harmonic distortion, THD — %
15
5
CT — VCC
40
10
n
Wo
or S
N
e/
n
& M SW o
r
igh
o
H
/
/N
on
Nor
Me
off
SW
h
SW
g
i
r
H
o
N
r/
e/
No
&M
h
g
i
r/H
No
20
10
0
5
3
2
Rg=3.6kΩ
0.01
10
100
ICCO, ICCS — VCC
25
Supply voltage, VCC — V
Output voltage, VO — V
Total harmonic distortion, THD — %
Voltage gain (open circuit), VGO — dB
Voltage gain (closed circuit), VG — dB
90
Quiescent current, ICCO — mA
Quiescent current (with the electronic switch on), ICCS — mA
LA3241
5
3
2
10
18
20
ILA00628
VO ALC, THD — VI
Pin 17: open
VCC=4.5V
RL=10kΩ
Rg=3.6kΩ
THD
5
3
2
VO ALC
1.0
5
3
2
0.1
5
3
2
--60
--50
--40
--30
--20
--10
Input voltage, VI — dBm
0
10
20
ILA00630
No. 2564-10/15
LA3241
5
3
2
10
VO ALC, THD — VI
10
Pin 17: ground
Nor / High, Me / Nor on
VCC=6V
RL=10kΩ
Rg=3.6kΩ
Output voltage, VO — V
Total harmonic distortion, THD — %
Output voltage, VO — V
Total harmonic distortion, THD — %
100
5
3
2
1.0
VO ALC
5
3
2
THD
0.1
5
3
2
--70
--50
--40
--30
--20
--10
0
10
5
3
2
THD
0.1
5
--50
--40
--30
--20
--10
0
10
3
2
THD
0.1
5
--50
--40
--30
--20
--10
0
Input voltage, VI — dBm
10
--30
--20
--10
0
3
2
10
20
ILA00632
VO ALC, THD — VI
1.0
VO ALC
7
5
3
2
THD
0.1
7
5
VO ALC
5
3
2
THD
0.1
5
--50
--40
--30
--20
--10
Input voltage, VI — dBm
3
2
10
5
0
10
20
ILA00637
--30
--20
--10
0
10
20
ILA00634
VO ALC, THD — VI
Pin 17: open
Nor / High, Me / Nor on
VCC=9V
RL=10kΩ
Rg=3.6kΩ
3
2
VO ALC
1.0
5
3
2
THD
0.1
5
5
3
2
--40
--50
--40
--30
--20
--10
0
Input voltage, VI — dBm
VO ALC, THD — VI
1.0
--50
ILA00635
Pin 17: open
Nor / High, Me / Nor on
VCC=12V
RL=10kΩ
Rg=3.6kΩ
3
2
--60
--40
Pin 17: open
VCC=6V
f=1kHz
RL=10kΩ
Rg=3.6kΩ
3
2
--60
20
Output voltage, VO — V
Total harmonic distortion, THD — %
5
7
5
5
VO ALC
5
10
--50
Input voltage, VI — dBm
VO ALC, THD — VI
1.0
3
2
7
5
ILA00633
3
2
5
THD
0.1
2
--60
20
Pin 17: ground
Nor / High, Me / Nor on
VCC=9V
RL=10kΩ
Rg=3.6kΩ
3
2
--60
2
3
--60
Output voltage, VO — V
Total harmonic distortion, THD — %
Output voltage, VO — V
Total harmonic distortion, THD — %
10
3
10
VO ALC
1.0
3
2
VO ALC
Input voltage, VI — dBm
VO ALC, THD — VI
5
3
2
5
7
5
2
--60
20
Pin 17: open
Nor / High, Me / Nor on
VCC=6V
RL=10kΩ
Rg=3.6kΩ
5
3
2
--70
2
1.0
ILA00631
Input voltage, VI — dBm
Output voltage, VO — V
Total harmonic distortion, THD — %
10
Output voltage, VO — V
Total harmonic distortion, THD — %
Output voltage, VO — V
Total harmonic distortion, THD — %
5
3
2
3
VO ALC, THD — VI
Pin 17: ground
VCC=6V
f=1kHz
RL=10kΩ
Rg=3.6kΩ
3
--60
Input voltage, VI — dBm
100
7
5
3
2
10
5
10
20
ILA00636
VO ALC, THD — VI
Pin 17: ground
Nor / High, Me / Nor on
VCC=12V
RL=10kΩ
Rg=3.6kΩ
3
2
1.0
VO ALC
5
3
2
THD
0.1
5
3
2
--60
--50
--40
--30
--20
--10
Input voltage, VI — dBm
0
10
20
ILA00638
No. 2564-11/15
LA3241
VO ALC — VCC
2
1
0
--1
--2
--3
2
4
6
8
10
12
14
Supply voltage, VCC — V
1
0
--1
--2
0
2
4
6
7
5
3
2
1.0
7
5
10
12
14
16
ILA00640
VNO — VCC
3
Rg=3.6kΩ
VG=45dB=177
(VCC=6V)
f=1kHz
8
Supply voltage, VCC — V
ILA00639
Output noise voltage, VNO — µV
Equivalent input noise voltage, VNI — µV
2
16
VNI — VCC
10
REC AMP
Rg=3.6kΩ
RL=10kΩ
f=1kHz
2
1000
AT)
V NO(FL
7
5
3
VNO(DIN)
2
3
100
2
0
2
4
6
8
10
12
14
16
Supply voltage, VCC — V
18
T)
(FLA
VNO
1000
)
(DIN
VNO
3
2
100
7
5
3
2
100
5
2 3
1k
5
10k
2 3
5
100k
Input signal source resistance, Rg — Ω
2 3
0.8
0.6
0.4
0.2
0
2 3
5 7 100
2
3
5 7 1k
2
3
Load resistance, RL — Ω
5 7 10k
2 3
ILA00645
12
14
16
18
20
ILA00642
VNI — Rg
VCC=6V
f=1kHz
3
VNI
2
1.0
7
5
3
2
3
5
1k
2 3
5
10k
2
3
5
100k
Input signal source resistance, Rg — Ω
2 3
5
ILA00644
VO max — VCC
1.4
VO max
1.0
10
5
ILA00643
VO max — RL
REC AMP
VCC=6V
f=1kHz
THD=1%
8
7
2
100
5
Maximum output voltage, VO max — V
1.2
2 3
6
Supply voltage, VCC — V
Equivalent input noise voltage, VNI — µV
3
7
5
4
10
REC AMP
VCC=6V
f=1kHz
2
2
ILA00641
7
5
1.4
0
20
VNO — Rg
10000
Output noise voltage, VNO — µV
VI= --40dBm
VO ALC=0.66V=0dB
f=1kHz
Rg=3.6kΩ
--3
0
Maximum output voltage, VO max — V
VO ALC — VCC
3
VI= --40dBm
VO ALC=0.44V=0dB
f=1kHz
Rg=3.6kΩ
ALC output voltage, VOALC — V
ALC output voltage, VOALC — V
3
MIC AMP
f=1kHz
THD=1%
RL=10kΩ
1.2
VO max
1.0
0.8
0.6
0.4
0.2
0
0
2
4
6
8
10
12
Supply voltage, VCC — V
14
16
ILA00646
No. 2564-12/15
LA3241
VO, THD — VI
2
1.0
7
5
VO
3
2
0.1
7
5
D
TH
--50
--40
--30
--20
20
16
12
8
4
6
10
12
14
16
ILA00648
VNO — VCC
1000
3
8
Supply voltage, VCC — V
MIC AMP
Rg=2.2kΩ
RL=10kΩ
7
5
Output noise voltage, VNO — µV
5
2
ILA00647
MIC AMP
Rg=2.2kΩ
RL=10kΩ
7
0
0
--10
VNI — VCC
10
Equivalent input noise voltage, VNI — µV
VG
4
2
Input voltage, VI — dBm
3
2
VNO(FLAT)
100
2
VNI(DIN)
1.0
7
5
7
5
3
10
7
5
3
2
4
6
8
10
12
14
16
18
Supply voltage, VCC — V
20
2
3
2
100
N)
(DI
V NO
3
2
3
2
5
100
2 3
5
1k
2 3
5
10k
5 100k
ILA00651
REC AMP2
60
C
RE
AM
P1
50
5
100
2 3
5
1k
2 3
5
10k
Input frequency, fi — Hz
2 3
5
100k
ILA00653
20
2
VNI
7
5
3
5
100
2 3
5
1k
2 3
5
10k
2 3
5 100k
ILA00652
CT — fi
REC AMP1→
80
MIC AMP
REC AMP2
MIC AMP
70
REC AMP2
60
50
40
30
5
18
ILA00650
3
40
30
2 3
16
MIC AMP
VCC=6V
VG=26dB
RL=10kΩ
90
MIC AMP→REC AMP
VCC=6V
VO=0dBm(MIC OUT)
Rg=3.6kΩ
70
14
Input signal source resistance, Rg — Ω
CT — fi
80
12
7
2
2 3
2 3
Input signal source resistance, Rg — Ω
10
VNI — Rg
1.0
10
7
5
2 3
8
10
T)
(FLA
VNO
7
5
6
Supply voltage, VCC — V
Equivalent input noise voltage, VNI — µV
MIC AMP
VCC=6V
f=1kHz
RL=10kΩ
4
ILA00649
VNO — Rg
1000
7
5
VNO(DIN)
2
3
2
2
Output noise voltage, VNO — µV
24
3
0.01
--60
Crosstalk, CT — dB
MIC AMP
f=1kHz
RL=10kΩ
VO=0dBm
28
Voltage gain, VG — dB
3
VG — VCC
32
MIC AMP
f=1kHz
VCC=6V
RL=10kΩ
Crosstalk, CT — dB
Output voltage, VO — V
Total harmonic distortion, THD — %
5
VCC=6V
VO1=0dBm
Rg=3.6kΩ
*ALC off
20
2 3
5
100
2 3
5
1k
2 3
5
10k
Input frequency, fi — Hz
2 3
5 100k
ILA00654
No. 2564-13/15
LA3241
CT — fi
90
CT — fi
90
REC AMP1→ MIC AMP
REC AMP2
REC AMP1→ MIC AMP
REC AMP2
80
80
MIC AMP
70
Me / Nor on, Nor / High on REC AMP2
60
Me / Nor off, Nor / High off REC AMP2
VCC=6V
VI= --40dBm
(REC AMP1)
Rg=3.6kΩ
*ALC on
(0.42V 17short)
50
40
30
2 3
5
100
2 3
5
2 3
1k
5
10k
Input frequency, fi — Hz
2 3
Crosstalk, CT — dB
Crosstalk, CT — dB
MIC AMP
Me / Nor on, Nor / High on REC AMP2
60
Me / Nor off, Nor / High off REC AMP2
VCC=6V
VI= --40dBm
(REC AMP1)
Rg=3.6kΩ
*ALC on
(0.65V 17open)
50
40
30
5
2 3
100k
ILA00655
5
2 3
100
5
2 3
5 100k
ILA00656
MIC AMP
REC AMP
80
Crosstalk, CT — dB
MIC AMP
70
REC AMP1
60
50
VCC=6V
VO=0dBm
Rg=3.6kΩ
*ALC off
40
30
2 3
5
100
2 3
5
2 3
1k
5
10k
Input frequency, fi — Hz
2 3
70
Me / Nor on, Nor / High on REC AMP1
60
Me / Nor off, Nor /
High off REC AMP1
50
VCC=6V
VI= --40dBm
(REC AMP2)
Rg=3.6kΩ
*ALC on
(0.65V 17open)
40
30
20
2
3
5
100
2 3
5
1k
2 3
5
10k
Input frequency, fi — Hz
2 3
10
100k
ILA00659
0
--10
--20
--30
REC AMP
--40
MIC AMP
2 3
100
5
2 3
1k
5
10k
2 3
5 100k
ILA00658
Rr — VCC
VR= --20dBm
f=100Hz
CR ???
--20
--30
REC AMP
--40
MIC AMP
--50
--60
2
5
VCC=6V
VR= --20dBm
No CR
5
--10
4
6
8
10
12
14
16
Supply voltage, VCC — V
Rr — fr
20
VCC=6V
VI= --40dBm
(REC AMP2)
Rg=3.6kΩ
*ALC on
(0.42V 17short)
Input frequency, fi — Hz
Ripple rejection ratio, Rr — dB
MIC AMP
Me / Nor off, Nor / High off REC AMP1
50
2 3
100k
ILA00657
MIC AMP
REC AMP2→
REC AMP1
80
Me / Nor on, Nor / High on REC AMP1
60
30
5
CT — fi
90
70
40
18
ILA00660
Rr — Cr
--10
Ripple rejection ratio, Rr — dB
Crosstalk, CT — dB
10k
REC AMP2→
MIC AMP
Crosstalk, CT — dB
5
CT — fi
90
MIC AMP
REC AMP2→
REC AMP1
80
Ripple rejection ratio, Rr — dB
2 3
1k
Input frequency, fi — Hz
CT — fi
90
70
VCC=6V
fr=100Hz
VR= --20dBm
--20
--30
REC
--40
MIC
--50
--50
--60
2
3
5
100
2 3
5
1k
2 3
5
10k
Ripple frequency, fr — Hz
2 3
5
100k
ILA00661
--60
1.0
2
3
5
10
2
3
5
100
2
Ripple filter capacitor, Cr — µF
3
5
1000
ILA00662
No. 2564-14/15
LA3241
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.
This catalog provides information as of February, 2002. Specifications and information herein are subject
to change without notice.
PS No. 2564-15/15
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