DUAL LOW NOISE EQ AMP S1A0211X01 INTRODUCTION 8−SlP The S1A0211X01 is a monolithic integrated circuit consisting of a 2-channel pre-amplifier in an 8-pin plastic single in-line package. FEATURES • Recommended operating supply voltage range: VCC = 5V to 14V • Low noise (VNI = 1.0µV: Typ) • High channel separation • Minimum number of external parts required ORDERING INFORMATION Device package Operating Temperature S1A0211X01-I0U0 8−SlP −20°C — +70°C BLOCK DIAGRAM + + AMP1 1 INPUT1 2 AMP2 3 NF1 OUTPUT1 4 VCC 5 6 7 GND OUTPUT2 NF2 8 INPUT2 1 S1A0211X01 DUAL LOW NOISE EQ AMP ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Characteristic Symbol Value Unit Supply Voltage VCC 18 V Power Dissipation PD 200 mW Operating Temperature TOPR − 20 – + 70 °C Storage Temperature TSTG − 40 – + 125 °C ELECTRICAL CHARACTERISTICS (Ta=25°C, VCC = 9V, RL= 10kΩ, RG = 600Ω, f = 1kHz, NAB, unless otherwise specified) Characteristic Symbol Test Conditions Typ. Max. Unit − 4.0 6.0 mA 65 80 − dB Quiescent Circuit Current ICCQ Open Loop Voltage Gain GVO Closed Loop Voltage Gain GVC VO = 0.5V 30 35 37 dB Output Voltage VO THD = 1% 1.1 1.3 − V THD VO = 0.5V − 0.1 0.3 % 70 100 − kΩ − 1.0 2.0 µV 50 65 − dB Total Harmonic Distortion Input Resistance RI Equivalent Input Noise Voltage VNI Cross Talk CT 2 VI = 0 Min. − − R G = 2.2kΩ BW (− 3dB) = 15Hz − 30kHz R G = 2.2kΩ DUAL LOW NOISE EQ AMP S1A0211X01 TEST CIRCUIT VCC + Icc 47µF 100 + 47µF 0.033µF 2.7K 4 100K 2 10µF 10µF + 3 + 1 OUTPUT1 INPUT1 10K S1A0211X01 10µF + 8 10µF INPUT2 6 7 0.033µF 5 + OUTPUT2 10K 2.7K + 47µF 100K 100 3 S1A0211X01 DUAL LOW NOISE EQ AMP APPLICATION INFORMATION External Components C2 (C9): Input coupling capacitor These components are concerned with the output noise and operation starting time. Its capacitance is adequate for 10µF. As C2 (C9) below 4.7µF extends the operation starting time, a capacitance of over 4.8µF is recommended. C3 (C8): Negative feedback capacitor These components decide the low cut-off frequency, which is determined as follows: 1 C3 (C8) = 2πf • R (R ) L 2 7 where, fL: low cut-off frequency. A large C3 (C8) makes the operation starting time of an amplifier late. Its capacitance is adequate for 47 F. C4, R3, R2 (C7, R4, R5): Equalizer network These components decide the frequency response of an equalizer amplifier. The time constant of standard NAB characteristic is as follows: Tape Speed 9.5 cm/sec 4.75 cm/sec C4 (R2 + R3) 3,180 µsec 1,590 µsec C4, R2 90 µsec 120 µsec Time Constant C11 Filter capacitor of the power line This should be located as close to the supply voltage pin (Pin 4) as possible. The recommended value is 47µF. C1 (C10): Protection capacitor These components protect against wave damage of strong electric fields. They also protect against engine noise damage and block oscillation during high amplifying operations. C5 (C6): Output coupling capacitor The recommended value is 10µF. 4 DUAL LOW NOISE EQ AMP S1A0211X01 APPLICATION CIRCUIT VCC 1kΩ + 4 + CH1 INPUT1 C1 2 C10 C4 47µF 0.033µF R2 R3 2.7K 100K 10µF 3 CH1 OUTPUT1 + 1 1000P C9 10µF + CH2 INPUT2 47µF 100 C3 C2 10µF + C11 R1 C5 10K S1A0211X01 8 10µF 6 1000P 7 R5 0.033µF C7 2.7K R7 5 CH2 OUTPUT2 + C6 10K + C8 47µF C6 100 100K 5 S1A0211X01 DUAL LOW NOISE EQ AMP NOTES 6