NTE1221 Integrated Circuit Stereo Preamp Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V Collector–Base Voltage (Q1), VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Collector–Emitter Voltage (Q1), VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Emitter–Base Voltage (Q1), VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Collector Current (Q1), IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +125°C Recommended Operatin Conditions: (TA = +25°C unless otherwise specified) Recommended Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V Electrical Characteristics: (TA = +25°C, VCC = 6V, f = 1kHz unless otherwise specified) Parameter Dissipation Current Symbol Test Conditions I4, I13 Min Typ Max Unit – 3.5 6.0 mA Voltage Gain VG Vi = 0.5mV 57 61 – dB Output Voltage VO THD = 5%, RNF = 100Ω 1.0 1.5 – V Bandwidth BW Vi = 0.5mV, –3dB – 400 – kHz Total Harmonic Distortion THD VO = 0.45V, RNF = 100Ω – 0.5 0.9 % Input Resistance ri – 90 – kΩ Output Resistance ro – 1 – kΩ Crosstalk CT – –40 – dB Noise Voltage Converted to Input VNI VCC = 10V, Rg = 600Ω, NAB 4.8cm/s – 1.0 3.0 µV Collector Cutoff Current ICBO VCB = 15V – – 1.0 µA Emitter Cutoff Current IEBO VEB = 4V – – 1.0 µA DC Current Gain hFE VCB = 3V, IC = 1mA 70 – – – 0.5 – Transistor Characteristics Collector–Emitter Saturation Voltage VCE(sat) IC = 1mA, IC/IB = 10mA V Pin Connection Diagram 14 Non–Invert Input Amp 2 Invert Input Amp 2 1 13 VCC Amp 2 12 Output Amp 2 Gain Adjust 2 Output Amp 1 3 VCC Amp 1 4 11 Freq Comp Amp 2 Non–Invert Input Amp 1 5 10 Q1 Base 9 Q1 Collector Invert Input Amp 1 6 Gain Adjust 7 8 Q1 Emitter 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