NTE1085 Integrated Circuit Low Noise Audio Preamp Features: D Low Noise: VNI = 0.8µVrms(Typ) D High Open Loop Voltage Gain: GVO = 92dB (Typ) D Low Distortion: THD = 0.1% (Max) at VOUT = 7Vrms, GV = 40dB, f= 1kHz Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4mW/°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C Electrical Characteristics: (VCC = 35V, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Current ICC VIN = 0 – 3.5 6.0 mA Voltage Gain Open Loop GVO VIN = –85dBm, f = 1kHz 87 92 – dB GV VOUT = 7Vrms, f = 1kHz 38 40 42 dB Maximum Output Voltage VOM f = 1kHz, THD = 0.1% 7.0 9.0 – Vrms Equivalent Input Noise Voltage VNI RIAA Equalizer, Rg = 2.2kΩ, f = 1kHz – 0.8 1.8 µVrms Closed Loop Pin Connection Diagram (Front View) 7 VCC 6 Output 5 Bypass 4 GND 3 Feedback 2 Input High 1 Preamp Load Resistor .128 (3.2) .099 (2.5) Min .012 (0.25) .700 (17.8) Max 1 7 .100 (2.54) .600 (15.24) .323 (8.2) Max