Ordering number : ENA0903 Monolithic Linear IC LA74309TT Microphone Amplifier for Digital Still Camera Overview 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 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 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 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 Parameter Symbol Ratings Conditions min typ Unit max Current Dissipation 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 2nd to 5th harmonic ALC characteristics ALM ALC IN, VIN=-17dBV (=Standard level +32dB) ALMD ALC IN, VIN=-17dBV (=Standard level +32dB), THD from 2nd 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 2nd 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) 3297 3.0 6 0.5 3.0 4.9 10 1 0.2 0.125 1.1 max (0.85) 0.5 0.08 (0.5) 5 SANYO : MSOP10(150mil) No.A0903-2/5 LA74309TT 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 0.47µF 10 9 8 4.7µF 7 6 2.2kΩ VREF REG MIC VCC CHARGE LPF VCCA 3.0V DET + ALC 1 2 3 GND 4 5 MIC IN 0.01µF 0.01µF MIC STANDBY CTL ILA07158 No.A0903-3/5 LA74309TT Pin Functions PIN No. Pin Name DC voltage 1 GND 0V 2 ALC IN 1.60V AC voltage Functions Equivalent Circuit Ground Output level=-49dBV ALC input VCCA (=3.0V) (At MIC IN=-69dBV) 500Ω Maximum input level 2 =-10dBV 50kΩ VREFL 3 STANDBY Standby control CTL 45kΩ Over 2V: Standby OFF 3 40kΩ 4 MIC OUT 1.60V Output level=-49dBV MIC output VCCA (=3.0V) (At MIC IN=-69dBV) 500Ω 9.7kΩ 4 1kΩ VREFL 5 MIC IN 1.60V Standard input level MIC input VCCA (=3.0V) =-69dBV Maximum input level 500Ω =-30dBV 5 70kΩ VREFL 6 VREF 2.30V MIC VCC and ripple rejection pin VCCA (=3.0V) for VREFL 500Ω 500Ω 6 200 kΩ 7 INT MIC 2.30V MIC power supply 500Ω VCCA (=3.0V) VCC 2.2kΩ 7 23kΩ Continued on next page. No.A0903-4/5 LA74309TT Continued from preceding page. PIN No. Pin Name 8 ALC DET DC voltage AC voltage Functions Equivalent Circuit ALC detector VCCA (=3.0V) 1kΩ 500Ω 8 9 REC OUT 1.60V Output level=-9dBV REC output VCC (=3.3V) (At MIC IN=-69dBV) 500Ω 11kΩ 9 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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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's 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