NTE1794 Integrated Circuit Volatge Controlled Amp (VCA) for dbx Noise Reduction System Description: The NTE1794 is a dbx noise reduction system voltage controlled amp (VCA) in an 8-Lead SIP type package designed for use in tape decks and other audio equipment. This device features excellent linearity VCA for wider input level due to super low noise and a high gain NPN/PNP complementary process. Features: D Wide Operating Supply Voltage D Excellent Linearity Control Constant D Low Total Harmonic Distortion D Low Noise Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage, VCC, VEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA Power Dissipation (TA = +75C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to 125C Recommended Operating Conditions: Parameter Operating Supply Voltage Bias Current Input Level Range Symbol Test Conditions Min Typ Max Unit 4 12 15 V ISET - 2.0 - mA in -40 - +10 dBV VCC, VEE Note 1 Note 1. ISET = VEE - 4 VBE/REXT = VEE - 2.4/REXT = 2mA Electrical Characteristics: (TA = +25C, VCC = +12V, VEE = -12V, ISET = 2mA, f = 1kHz, RIN = ROUT = 33k unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Current ICC Non Signal 1.0 2.0 3.0 mA Equivalent Input Bias Current IIN Non Signal - 6 20 nA Gain Cell Idling Current IDLE Non Signal - 20 - A Gain Cell Offset Voltage VOFF AV = 0dB, THD 0.07% - 0.5 - mV -5.8 -5.9 -6.1 mV/dB Control Constant VC Total Harmonic Distortion AV = -30dB to +30dB THD Output Noise Level NV Symmetry Control Voltage VSYM AV = 0dB, VO = 0dBV, BPF = 400Hz to 5kHz - 0.007 0.07 % AV = +20dB, VO = 0dBV, BPF = 400Hz to 5kHz - 0.02 0.10 % AV = -20dB, VIN = 0dBV, BPF = 400Hz to 5kHz - 0.02 0.15 % AV = 0dB, RIN = 33k, BPF = 10Hz to 20kHz - -94 -84 dBV AV = 0dB, THD 0.07% -4 0 +4 mV Pin Connection Diagram (Front View) 8 Signal Output 7 VCC 6 GND 5 ISET 4 GC Bias 3 GC1 2 GC2 1 Signal Input .118 (3.0) Max .768 (19.52) Max 1 8 .264 (6.72) Max .165 (4.2) Min .100 (2.54) Typ .700 (17.78)