NTE1634 Integrated Circuit Dual Preamp w/ALC Description: The NTE1634 is a monolithic integrated circuit in a 14–Lead DIP type package consisting of a dual equalizer amplifier with automatic level control (ALC) and is suitable for stereo radio cassette applications. Features: D Dual Equalizer Amplifier with Built–In ALC Circuit. D Recording Amp Available Because of High Gain Characteristic (Variable Monitor Possible). D Good Channel Separation (Sep = 50dB Typ) D Capable of Direct Meter Driving and ALS Transistor. D Good ALC Response Balance Between Channels. D Wider Operating Supply Voltage Range (4V to 13V) Absolute Maximum Ratings: (TA = +25°C unles otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C ALC TR Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5mA Electrical Characteristic: (TA = +25°C, VCC = 5V, RL = 10kΩ: Playback, RL = 680Ω: Recording unless otherwise specified) Parameter Symbol Test Conditions Typ Max Unit – 4.5 10 mA – 85 – dB Circuit Current ICC Voltage Gain (Open Loop) AVO Voltage Gain (Closed Loop) AV1 Play – 40 – dB AV2 Record – 58 – dB VO THD = 1%, Play 0.9 1.2 – V THD VO = 0.5V, Play – 0.1 1.0 % 21 30 – kΩ Output Voltage Total Harmonic Distortion Vi = 0 Min Input Resistance Ri Equivalent Input Noise Voltage VNI BW(–3dB)=20Hz to 20kHz – 1.0 2.0 µV Cross Talk CT Rg = 2.2KΩ 40 50 – dB ALC Range Vi = –60dBm, Record 35 45 – dB ALC Balance Vi = –20dBm, Record – 0 2.0 dB ALC Distortion Vi = –20dBm, Record – 0.5 2.0 % Pin Connection Diagram GND 1 14 VCC 13 Output 2 Output 1 2 PC 1 3 12 PC 2 NF 1 4 11 NF 2 Input 1 5 10 Input 2 ALC Output 1 6 9 ALC Output 2 ALC Input 7 8 DC 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min