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| NTE1801 Integrated Circuit TV dbx Noise Reduction System Description: The NTE1801 Multiplexed Sound dbx Noise Reduction Decoder is a single-chip linear IC in a 28-Lead DIP type package suitable for US NTSC System use. The device incorporates two RMS- level sensors and VCA circuits, as well as five operational amplifiers and two buffer circuits. A complete multiplexed sound system for US NTSC System television sets can be built by interfacing the NTE1801 with the NTE1800 Multiplexed Sound Decoder. Features: D Low Distortion Ratio, Low Interference D Low Power Supply Current D Single, 8V to 15V Power Supply D 100mVrms (300Hz, 0dB) Input Voltage (Pin4) D Easily Interfaced to the NTE1800 Functions: D On-Chip dbx Noise Reduction Decoder and VCA Circuits D On-Chip RMS Level Sensor D L + R Signal Buffer Amplifier Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Power Dissipation (TA = +75C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 580mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +125C Recommended Operating Conditions: (TA = +25C unless otherwise specified) Parameter Power Supply Voltage Input Signal Voltage Amp 1 Gain Amp 2 Gain Symbol VCC VIN AV1 AV2 Test Conditions f = 300Hz, Pin4 Min 8.0 - 0 0 Typ 12.0 100 10.3 - Max 13.5 - 30.0 20 Unit V mVrms dB dB Operating Characteristics: (TA = +25C, VCC = 12V, 0dB = 100mVrms unless otherwise specified) Parameter Circuit Current Output Voltage Symbol ICC VO1 VO2 VO3 VO4 VO5 VO6 VO7 Maximum Output Voltage Total Harmonic Distortion VOM THD1 THD2 Output Noise Voltage NL1 NL2 Reference Voltage Vref VCC = 12V No Signal f = 300Hz, VIN = +10dB f = 300Hz, VIN = 0dB f = 300Hz, VIN = -20dB f = 8kHz, VIN = +17dB f = 8kHz, VIN = +7dB f = 8kHz, VIN = -3dB f = 1kHz, VIN = 215mV f = 1kHz, THD = 1%, (400 to 300kHz using BPF) VO = 0dB, f = 1kHz, (400 to 300kHz using BPF) VO = 215mV, f = 1kHz, (400 to 300kHz using BPF) Rg = 0, 400 to 30kHz using BPF Test Conditions Notes - (L-R) (L-R) (L-R) (L-R) (L-R) (L-R) (L+R) (L-R) (L-R) (L+R) (L-R) (L+R) - Min 8.0 +17 -3 -43 Typ 12.5 +20 0 -40 Max 17.0 +23 +3 -37 Unit mA dB dB dB dB dB dB dB VP-P % % dBV dBV V +12.1 +15.1 +18.1 -14.6 -11.6 -8.6 -43.6 -40.6 -37.6 -0.5 4.0 - - - - 5.8 0 8.6 0.1 0.1 -96 -90 6.0 +0.5 - 0.5 0.3 -90 -70 6.2 Caution: Static Electricity can impair the performance of this device. Pin Connection Diagram GND Non-Invert Input (Amp 1) Invert Input (Amp 1) Preamp Output Buffer Input Buffer Output RMS Detector 1 Input Capacitor RMS Detector 2 Input 1 2 3 4 5 6 7 8 9 28 Reference Voltage 27 Capacitor 26 Buffer Input 25 Buffer Output 24 VCA1 Input 23 VCA1 Adjust 22 N.C. 21 N.C. 20 Input (Amp 3) 19 Output (Amp 3) 18 VCA2 Input 17 Input (Amp 4) 16 L-R/SAP Output 15 L+R Output Capacitor 10 Resistor Adjust 11 Non-Invert Input (Amp 5) 12 Invert Input (Amp 5) 13 VCC 14 28 15 1 14 1.120 (28.4) .338 (8.6) .200 (5.08) .070 (1.78) .130 (3.3) .400 (10.16) |
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