ENA2050 D

Ordering number : ENA2050
LA74309FA
Monolithic Linear IC
Microphone Amplifier
for Digital Still Camera
http://onsemi.com
Overview
LA74309FA 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)
• 3V regulator (At the time of VCC=3.3V, internal supply voltage: VCCA≈3.0V)
• Standby control (ICC≤10μA)
Specifications
Absolute Maximum Ratings at Ta=25°C
Parameter
Maximum power supply voltage
Allowable power dissipation
Symbol
Conditions
VCC max
Pd max
Ta≤85°C
Ratings
Unit
4.0
V
50
mW
Operating temperature
Topr
-20 to +85
°C
Storage temperature
Tstg
-55 to +150
°C
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
112 SY 20120301-S00001 No.A2050-1/5
LA74309FA
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended power supply voltage
Conditions
Ratings
VCC
Operating voltage range of VCC
VCCop
Unit
3.3
V
3.1 to 3.6
V
Electrical Characteristics at Ta=25°C, VCC=3.3V, f=1kHz
Ratings
Parameter
Symbol
Conditions
Unit
min
typ
max
Circuit current
VCC no signal current dissipation
ICC
VCC standby current dissipation
REC output system
ICCS
VCC=3.3V, Standby mode (Pin3=0V)
Standard REC output level
VOR
VIN=-49dBV at ALC IN pin (=Standard level)
Standard REC output distortion
HDR
ALC IN, VIN=-49dBV, THD from to 5th harmonic
ALC characteristics
ALM
ALC IN, VIN=-17dBV (=Standard level +32dB)
ALMD
ALC IN, VIN=-17dBV (=Standard level +32dB),
THD from to 5th harmonic
ALC THD
VINRMX
ALC IN maximum input level
VCC=3.3V, Active mode (Pin3=3V)
VNOR
No signal at MIC IN pin, with JIS-A Filter
REC output frequency
FEQR1
ALC IN, VIN=-17dBV, The output level ratio at
f=11kHz/1kHz
REC output frequency
-10
-3
5.3
6.7
mA
10
μA
-9
-8
dBV
0.1
0.2
-1
0.25
REC output THD≤3%
REC output noise level
characteristics 1
3.9
-5
%
dBV
1
%
-10
dBV
-53
-47
dBV
-3
-1
dB
FEQR2
ALC IN, VIN=-17dBV, The output level ratio at
f=22kHz/1kHz
-18
-12
dB
FEQR3
ALC IN, VIN=-17dBV, The output level ratio at
f=100kHz/1kHz
-55
-45
dB
MIC voltage gain
VGMIC
VIN=-39dBV at MIC IN pin
20
21
dB
MIC output THD
HDMIC
MIC IN, VIN=-39dBV, THD from to 5th harmonic
0.03
0.1
%
-30
dBV
1.9
V
characteristics 2
REC output frequency
characteristics 3
MIC output system
MIC IN maximum input level
VINMMX
MIC VCC output DC voltage
VMIC
19
MIC output THD=3%
With 6.2kΩ load
1.5
1.7
Package Dimensions
unit : mm (typ)
3428
3.0
0.55
4.9
3.0
10
1 2
0.5
0.16
0.1
1.03
0.25
SANYO : Micro10
No.A2050-2/5
LA74309FA
Pin assinment
GND
1
10
VCC
ALC IN
2
9
REC OUT
STANDBY L
3
8
ALC DET
MIC OUT
4
7
INT MIC VCC
MIC IN
5
6
VREF
LA74309FA
Pin Description
Pin No.
Pin Description
1
GND
2
ALC input
3
STANDBY CTL
4
MIC output
5
MIC input
6
Ripple removal for VREF
7
Internal MIC power supply
8
ALC DET
9
REC output
10
VCC
Equivalent Circuit Block Diagram & Application Circuit
REC OUT
VCC3.3V
10
9
8
7
6
VREF
REG
MIC VCC
CHARGE
LPF
VCCA
3.0V
DET
+
ALC
1
2
GND
3
4
5
MIC IN
MIC
STANDBY
CTL
No.A2050-3/5
LA74309FA
Pin Functions
PIN No.
Pin Name
DC voltage
1
GND
0V
2
ALC IN
AC voltage
Functions
Equivalent Circuit
Ground
Output level=-49dBV
VCCA (=3.0V)
(At MIC IN=-69dBV)
Maximum input level
=-10dBV
2
VREFL
3
STANDBY L
Standby control pin
3
Over 2V: Standby OFF
4
MIC OUT
1.60V
Output level=-49dBV
MIC output pin
VCCA (=3.0V)
(At MIC IN=-69dBV)
4
VREFL
5
MIC IN
Standard input level
MIC input pin
VCCA (=3.0V)
=-69dBV
Maximum input level
5
=-30dBV
VREFL
6
VREF
2.30V
MIC VCC and ripple rejection pin
VCCA (=3.0V)
for VREFL
6
7
INT MIC
2.30V
MIC power supply pin
VCCA (=3.0V)
VCC
7
Continued on next page.
No.A2050-4/5
LA74309FA
Continued from preceding page.
PIN No.
Pin Name
8
ALC DET
DC voltage
AC voltage
Functions
Equivalent Circuit
ALC detector pin
VCCA (=3.0V)
8
9
REC OUT
1.60V
Output level=-9dBV
REC output pin
VCC (=3.3V)
(At MIC IN=-69dBV)
9
VREFL
10
VCC
3.3V
Power supply pin
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PS No.A2050-5/5
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