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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=-1dBV2.5Vpp) * 3rd order LPF (fc=11kHz) * 3.3V regulator (internal supply voltage: VCCA3.0V) * Standby control (ICC10A)
Specifications
Maximum Ratings at Ta=25C
Parameter Maximum power supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta85C 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 = 25C
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=25C, 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 6.2k 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 A 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 THD3% 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 0.47F 4.7F
10
9
8 2.2k
7
6 VREF
REG
MIC VCC CHARGE LPF
VCCA 3.0V ALC
DET +
1 GND
2 0.01F
3
4
5 MIC IN 0.01F 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
500 2 50k VREFL
3
STANDBY CTL
Standby control Over 2V: Standby OFF
45k 3 40k
4
MIC OUT
1.60V
Output level=-49dBV (At MIC IN=-69dBV)
MIC output
VCCA (=3.0V)
500 4
9.7k 1k VREFL
5
MIC IN
1.60V
Standard input level =-69dBV Maximum input level =-30dBV
MIC input
VCCA (=3.0V)
500 5 70k VREFL
6
VREF
2.30V
MIC VCC and ripple rejection pin for VREFL
VCCA (=3.0V)
500 500 6 200 k 500
7
INT MIC VCC
2.30V
MIC power supply
VCCA (=3.0V)
2.2k 7 23k
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)
1k 8
500
9
REC OUT
1.60V
Output level=-9dBV (At MIC IN=-69dBV)
REC output
VCC (=3.3V)
500 9
11k 11k VREFL
10
VCC
3.3V
Power supply
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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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