NTE1458 Integrated Circuit Dual Audio Preamp Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15mA Power Dissipation (TA = +75°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270mW Operating Temperature Range, Topt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40 to +125°C Recommended Operating Condition: Parameter Symbol Supply Voltage Test Conditions VCC Min Typ Max 6.0 13.2 17.0 Unit V Electrical Characteristics: (TA = +25°C, VCC = 13.2V, f = 1kHz, RL = 10kΩ unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current ICC υi = 0 2.5 3.3 5.5 mA Open Loop Voltage Gain Aυo υo = 0.3V 78 88 – dB Voltage Gain Aυ υo = 0.3V, NAB = 45dB – 45 – dB Maximum Output Voltage VOM THD = 1%, NAB = 45dB 1.0 1.6 – Vrms Total Harmonic Distortion THD υo = 0.3V, NAB = 45dB – 0.13 0.3 % 50 100 – kΩ RG = 2.2kΩ, NAB = 45dB, BPF (15Hz to 30kHz) – 1.2 2.0 µVrms Crosstalk υo = 1V, NAB = 45dB, RG = 2.2kΩ – –65 – dB Channel Balance υo = 0.3V –0.5 0 +0.5 dB Input Impedance Zin Equivalent Input Noise Voltage υnin Pin Connection Diagram (Front View) 8 Input Amp 2 7 Feedback 6 Output Amp 2 5 GND 4 VCC 3 Output Amp 1 2 Feedback 1 Input Amp 1 .768 (19.52) Max .118 (3.0) Max .264 (6.72) Max 1 8 .165 (4.2) Min .100 (2.54) Typ .700 (17.78)