S1A2224A01

DUAL EQ AMP WITH ALC S1A2224A01 INTRODUCTION The S1A2224A01 is a monolithic integrated circuit consisting of a dual equalizer amplifier with ALC, and it is suitable for stereo radio cassette-tape players. 14−DIP−300 FEATURES • • • • • • • Dual equalizer amplifier with a built-in ALC circuit Recording amp available because of high gain characteristics (Variable monitor possible) Good channel separation (sep = 50dB Typ) Quick stabilization after power on Capable of direct meter driving and ALC transistor Good ALC response balance between channels Wide operating supply voltage range: Vcc = 4V — 13V ORDERING INFORMATION Device S1A2224A01-D0B0 Package 14−DIP−300 Operating Temperature −20°C — +70°C 1 S1A2224A01 DUAL EQ AMP WITH ALC BLOCK DIAGRAM VCC 14 OUTPUT2 13 COMP2 12 + NF2 11 INPUT2 10 ALC OUT2 9 DECOUPLE 8 ALC2 + - ALC1 1 GND 2 OUTPUT1 3 COMP1 4 NF1 5 INPUT1 6 ALC OUT1 7 ALC INPUT ABSOLUTE MAXIMUM RATINGS (Ta =25°C) Characteristic Supply Voltage Power Dissipation Operating Temperature Storage Temperature ALC TR Maximum Current Symbol VCC PD TOPR TSTG – Value 14 600 −20 — +70 −40 — +125 3.5 Unit V mW °C °C mA 2 DUAL EQ AMP WITH ALC S1A2224A01 ELECTRICAL CHARACTERISTICS (Ta = 25°C, Vcc = 5V, RL = 10kΩ, f = 1kHz: play, RL = 680Ω: Recording) Characteristic Quiescent Circuit Current Open Loop Voltage Gain Closed Loop Voltage Gain Output Voltage Total Harmonic Distortion Input Resistance Equivalent Input Noise Voltage Cross Talk ALC Range ALC Balance ALC Distortion Symbol ICCQ GVO GVC1 GVC2 VO THD RI VNI CT VALC CBALC THDALC Play Record THD =1%, Play VO = 0.5V, Play − BW (−3dB) = 20Hz − 20kHz RG = 2.2kΩ VI = −60dBm, Record VI = −20dBm, Record VI = −20dBm, Record Test Conditions VI = 0 − Min. − − − − 0.9 − 21 − 40 35 − − Typ. 4.5 85 40 58 1.2 0.1 30 1.0 50 45 0 0.5 Max. 10 − − − − 1.0 − 2.0 − − 2.0 2.0 Unit mA dB dB dB V % kΩ µV dB dB dB % 3 S1A2224A01 DUAL EQ AMP WITH ALC 4 DUAL EQ AMP WITH ALC S1A2224A01 5 S1A2224A01 DUAL EQ AMP WITH ALC TEST CIRCUIT 10kΩ P 680Ω R 56 Ω R 4.7kΩ P OUT2 10µ F 0.033µ F 51kΩ 22µ F IN2 4.7 µ F 2.2kΩ Vcc 220µ F 14 13 12 11 10 9 8 220µ F S1A2224A01 1 2 3 4 5 6 7 51kΩ R OUT1 4.7kΩ P 0.033µ F 22µ F 4.7 µ F 2.2kΩ IN1 P 10kΩ R 680Ω 300kΩ P R P R 680Ω 4.7µ F IN60 IN60 680Ω 4.7µ F IN60 IN60 6 4.7µF 56Ω DUAL EQ AMP WITH ALC S1A2224A01 APPLICATION INFORMATION Closed Loop Voltage Gain Z 4 C1 22µ RF 56 + R1 51K 2 C3 + 10µ R2 4.7K C2 0.033µ RL SW on: play SW off: record A. Playback amplifier 1 ) Gv = 20 log Z (dB) at f =1 kHz, GV = 42 dB (Typ) Z = R1//(R2 + RF 2πf • C2 B. Recording amplifier Gv =20 log R1 (dB) at f =1 kHz, GV = 58 dB (Typ) RF 7 S1A2224A01 DUAL EQ AMP WITH ALC ALC Circuit The ALC circuit consists of TR1, TR2 and some external components. The output level of the amplifier is recti-fied by external circuits. Since this DC level is applied to the ALC input terminal (Pin 7), the impedance between the collector and emitter of TR1 can change its value. Therefore, the pre-amplifier input level can be controlled. TR2 INPUT R1 5 INPUT TR1 R4 7 C1 + 2 + C4 R2 RL 6 D2 C2 + D1 D3 + R3 8 This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.