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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 VCC, VEE Note 1 ISET in Test Conditions Min 4 - -40 Typ 12 2.0 - Max 15 - +10 Unit V mA dBV
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 Supply Current Equivalent Input Bias Current Gain Cell Idling Current Gain Cell Offset Voltage Control Constant Total Harmonic Distortion Symbol ICC IIN IDLE VOFF VC THD Non Signal Non Signal Non Signal AV = 0dB, THD 0.07% AV = -30dB to +30dB AV = 0dB, VO = 0dBV, BPF = 400Hz to 5kHz AV = +20dB, VO = 0dBV, BPF = 400Hz to 5kHz AV = -20dB, VIN = 0dBV, BPF = 400Hz to 5kHz Output Noise Level Symmetry Control Voltage NV VSYM AV = 0dB, RIN = 33k, BPF = 10Hz to 20kHz AV = 0dB, THD 0.07% Pin Connection Diagram (Front View) Test Conditions Min 1.0 - - - -5.8 - - - - -4 Typ 2.0 6 20 0.5 -5.9 Max 3.0 20 - - -6.1 Unit mA nA A mV mV/dB % % % dBV mV
0.007 0.07 0.02 0.02 -94 0 0.10 0.15 -84 +4
8 Signal Output 7 VCC 6 GND 5 ISET 4 GC Bias 3 GC1 2 GC2 1 Signal Input
.768 (19.52) Max
.118 (3.0) Max
1
8
.264 (6.72) Max
.165 (4.2) Min
.100 (2.54) Typ .700 (17.78)

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