NTE1517 Integrated Circuit Dual Audio Preamp w/ ALC Description: The NTE1517 is an integrated circuit consisting of a dual preamplifier with ALC. It is designed for use in stereo equipment or radio−cassette recorders. The device consists of two independent high−gain, low−distortion amplifiers and ALC on a single chip. By using an external switch, the NTE1517 can be used as a stereo preamplifier with good channel balance. Features: D Low Noise: VNI = 1μVrms (Rg = 620Ω, BW = 20Hz to 20kHz) D High Gain: GVO = 80dB typ. D Low Distortion: THD = 0.1% typ. (GVC = 46dB, VO = 0.3Vrms) D Low Supply Current: 6mA typ. D Built−in Circuit to Reduce Shock−Noise at Switch−On D Does not require an Input Coupling Capacitor Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Circuit Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650mW Thermal Derating (TA ≥ 25°C), Kθ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5mW/°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Electrical Characteristics: (TA = +25°C, f = 1kHz, Rg = 620Ω, VCC = 9V, unless otherwise specified) Parameter Symbol Test Conditions Circuit Current ICCO Quiescent Open Loop Voltage Gain GVO VO = 0.3Vrms Min Typ Max Unit 3 6 10 mA VCO = 5V 67 77 − dB VCO = 9V 67 80 − dB VCO = 12V 67 81 − dB − 0.1 0.5 % Total Harmonic Distortion THD Closed Loop Voltage Gain GVC 44 46 48 dB Ri 17 27 38 kΩ 1.3 2.0 − Vrms − 210 650 μVrms − 0.2 1.2 % Vi = −40dBv, −10dBv − 0 2.5 dB THD = 10% 40 55 − dB Input Resistance VO = 0.3Vrms Max. Output Voltage VOM THD = 3% Output Noise Voltage NO BW = 20Hz to 20kHz ALC Distortion ALC Balance ALC Range THDALC Vi = −40dBv ΔVALC ALC Pin Connection Diagram 10 Filter 9 Rt Ch Feedback 8 Rt Ch Input 7 Rt Ch Output 6 VCC 5 ALC Control 4 GND 3 Lt Ch Output 2 Lt Ch Input 1 Lt Ch Feedback .127 (3.2) .953 (24.1) .257 (6.5) .334 (8.48) 1 16 .125 (3.17) .059 (1.5) .118 (3.0)