Ordering number : ENA0903
Monolithic Linear IC
LA74309TT
Overview
Microphone Amplifier for
Digital Still Camera
LA74309TT is a microphone amplifier for digital still cameras that have mono audio recording. The analog signal processing
for the recording of the digital still camera or other equipment can be easily composed, because the MIC power supply and
the ALC circuit are built-in. Moreover, the regulator is built-in, therefore external regulator IC is unnecessary.
Features
•
Microphone (MIC) amplifier (+20dB)
•
MIC power supply with built-in pull-up resistor
•
Automatic level control (ALC) amplifier (output level=-1dBV≈2.5Vpp)
•
3rd order LPF (fc=11kHz)
•
3.3V regulator (internal supply voltage: VCCA≈3.0V)
•
Standby control (ICC
≤10µA)
Specifications
Maximum Ratings
at Ta=25°C
Parameter
Maximum power supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Ta≤85°C
Conditions
Ratings
4.0
50
-20 to +85
-55 to +150
Unit
V
mW
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
82907 TI IM 20061115-S00005 No.A0903-1/5
LA74309TT
Operating Conditions
at Ta = 25°C
Parameter
Recommended power supply voltage
Operating voltage range of VCC
Symbol
VCC
VCCop
Conditions
Ratings
3.3
3.1 to 3.6
Unit
V
V
Electrical Characteristics
at Ta=25°C, VCC=3.3V, f=1kHz
Parameter
Current Dissipation
VCC no signal current dissipation
VCC standby current dissipation
REC output system
Standard REC output level
Standard REC output distortion
ALC characteristics
ALC THD
ALC IN maximum input level
REC output noise level
REC output frequency
characteristics 1
REC output frequency
characteristics 2
REC output frequency
characteristics 3
MIC output system
MIC voltage gain
MIC output THD
MIC IN maximum input level
MIC VCC output DC voltage
VGMIC
HDMIC
VINMMX
VMIC
VIN=-39dBV at MIC IN pin
MIC IN, VIN=-39dBV, THD from 2nd to 5th harmonic
MIC output THD=3%
With 6.2kΩ load
1.5
1.7
19
20
0.03
21
0.1
-30
1.9
dB
%
dBV
V
FEQR3
FEQR2
ICC
ICCS
VCC=3.3V, Active mode (Pin3=3V)
VCC=3.3V, Standby mode (Pin3=0V)
3.9
5.3
6.7
10
mA
µA
Symbol
Conditions
min
Ratings
typ
max
Unit
VOR
HDR
ALM
ALMD
VINRMX
VNOR
FEQR1
VIN=-49dBV at ALC IN pin (=Standard level)
ALC IN, VIN=-49dBV, THD from 2nd to 5th harmonic
ALC IN, VIN=-17dBV (=Standard level +32dB)
ALC IN, VIN=-17dBV (=Standard level +32dB),
THD from 2nd to 5th harmonic
REC output THD≤3%
No signal at MIC IN pin, with JIS-A Filter
ALC IN, VIN=-17dBV, The output level ratio at
f=11kHz/1kHz
ALC IN, VIN=-17dBV, The output level ratio at
f=22kHz/1kHz
ALC IN, VIN=-17dBV, The output level ratio at
f=100kHz/1kHz
-10
-9
0.1
-8
0.2
dBV
%
dBV
-3
-1
0.25
1
-10
-53
-47
-1
-12
-45
%
dBV
dBV
dB
dB
dB
-5
-3
-18
-55
Package Dimensions
unit : mm (typ)
3297
3.0
10
6
3.0
4.9
1
(0.5)
0.5
5
0.2
0.125
(0.85)
SANYO : MSOP10(150mil)
0.08
1.1 max
0.5
No.A0903-2/5
LA74309TT
Pin Description
Pin No.
1
2
3
4
5
6
7
8
9
10
GND
ALC input
STANDBY CTL
MIC output
MIC input
Ripple removal for VREF
Internal MIC power supply
ALC DET
REC output
VCC
Pin Description
Equivalent Circuit Block Diagram & Application Circuit
REC OUT
VCC3.3V
0.47µF
4.7µF
10
9
8
2.2kΩ
7
6
VREF
REG
MIC VCC
CHARGE
LPF
VCCA
3.0V
ALC
DET
-
+
1
GND
2
0.01µF
3
4
5
MIC IN
0.01µF
MIC
STANDBY
CTL
ILA07158
No.A0903-3/5
LA74309TT
Pin Functions
PIN No.
1
2
Pin Name
GND
ALC IN
DC voltage
0V
1.60V
Output level=-49dBV
(At MIC IN=-69dBV)
AC voltage
Ground
ALC input
VCCA (=3.0V)
Functions
Equivalent Circuit
Maximum input level
=-10dBV
500Ω
2
50kΩ
VREFL
3
STANDBY
CTL
Standby control
Over 2V: Standby OFF
45kΩ
3
40kΩ
4
MIC OUT
1.60V
Output level=-49dBV
(At MIC IN=-69dBV)
MIC output
VCCA (=3.0V)
500Ω
4
9.7kΩ
1kΩ
VREFL
5
MIC IN
1.60V
Standard input level
=-69dBV
Maximum input level
=-30dBV
MIC input
VCCA (=3.0V)
500Ω
5
70kΩ
VREFL
6
VREF
2.30V
MIC VCC and ripple rejection pin
for VREFL
VCCA (=3.0V)
500Ω
500Ω
6
200
kΩ
500Ω
7
INT MIC
VCC
2.30V
MIC power supply
VCCA (=3.0V)
2.2kΩ
7
23kΩ
Continued on next page.
No.A0903-4/5
LA74309TT
Continued from preceding page.
PIN No.
8
Pin Name
ALC DET
DC voltage
AC voltage
Functions
ALC detector
Equivalent Circuit
VCCA (=3.0V)
1kΩ
8
500Ω
9
REC OUT
1.60V
Output level=-9dBV
(At MIC IN=-69dBV)
REC output
VCC (=3.3V)
500Ω
9
11kΩ
11kΩ
VREFL
10
VCC
3.3V
Power supply
SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
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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 Semiconductor Co.,Ltd. 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.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
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intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of August, 2007. Specifications and information herein are subject
to change without notice.
PS No.A0903-5/5
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