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| NTE1859 Integrated Circuit dbx TV Noise Reduction Integrated Circuit Description: The NTE1859 is an integrated circuit designed for the dbx-TV noise reduction decode circuit for multichannel TV sound systems. This device contains a voltage controlled amplifier, a variable de-emphasis circuit with new configuration and RMS detectors with completely integrated active band pass filters, and offers the complete dbx-TV noise reduction decoder only with a few external components. Features: D Integrated Band Pass Filters using Active Filtering Technique and Thin Film Structure with High Capacitance D Variable De-emphasis Circuit with New Circuit Configuration D Minimum Number of External Components D Wide Operation Voltage Range: 4.7V to 16V Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17V Allowable Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 715mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Recommended Operating Voltage: Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 15V Electrical Characteristics: (TA = +25C, VCC = +9V Reference Level: 0dB = -5dBm (436mVrms) unless otherwise specified) Parameter Symbol ICC Vod-1 Vod-2 Vod-3 Vod-4 Vod-5 Vod-6 Vod-7 Vod-8 Vod-9 Test Conditions Min 4.0 5.5 -14.5 -44.5 1.3 -19.4 -39.6 -4.3 -30.9 -45.2 Typ 5.0 7.0 -13.0 -43.0 3.3 -17.4 -37.6 -1.8 -28.4 -42.7 Max 6.3 8.5 -11.5 -41.5 5.3 -15.4 -35.6 0.7 -25.9 -40.2 Unit mA dB dB dB dB dB dB dB dB dB Consumption Current Decode Characteristics No Signal Vi = -5dB, f = 300Hz Vi = -15dB, f = 300Hz Vi = -30dB, f = 300Hz Vi = 0dB, f = 1kHz Vi = -10dB, f = 1kHz Vi = -20dB, f = 1kHz Vi = 0dB, f = 8kHz Vi = -10dB, f = 8kHz Vi = -20dB, f = 8kHz Electrical Characteristics (Cont'd): (TA = +25C, VCC = +9V Reference Level: 0dB = -5dBm (436mVrms) unless otherwise specified) Parameter Symbol Vfp-1 Vfp-2 Vfg-1 Vfg-2 THD Vom-1 Vom-2 Von Itime VCC/2 Test Conditions Min -5.5 -13.0 -9.4 -32.3 - 11.0 -2.0 - (7.1) 4.3 Typ -4.0 -11.0 -7.4 -28.8 0.1 12.5 1.0 -104 7.5 4.5 Max -2.5 -9.0 -5.4 -25.3 0.3 - - -80 (7.9) 4.7 Unit dB dB dB dB % dB dB dB A V VCA Filter Characteristics Vemp. Filter Characteristics Total Harmonic Distortion Ratio Maximum Output Voltage Output Noise Level Timing Current Center Potential f = 3kHz, Vi = 0dB, refer to 1kHz f = 8kHz, Vi = 0dB, refer to 1kHz f = 5kHz, Vi = 0dB, refer to 8kHz f = 2kHz, Vi = 0dB, refer to 8kHz f = 1kHz, Vi = -3dB f = 300Hz, THD = 1.5% f = 8kHz, THD = 1.5% A weight Electrical Characteristics: (TA = +25C, VCC = +9V Reference Level: 0dB = -5dBm (436mVrms) Note 1 unless otherwise specified) Parameter Consumption Current Decoding Characteristics 300Hz, -5dB 300Hz, -15dB 300Hz, -30dB 1kHz, 0dB 1kHz, -10dB 1kHz, -20dB 8kHz, 0dB 8kHz, -10dB 8kHz, -15dB VCA Filter Characteristics 3kHz 8kHz Vemp Filter Characteristics 5kHz 2kHz Total Harmonic Distortion Ratio Maximum Output Voltage 300Hz 8kHz Output Noise Level Middle Point Potential Symbol ICC Vod-1 Vod-2 Vod-3 Vod-4 Vod-5 Vod-6 Vod-7 Vod-8 Vod-9 Vfp-1 Vfp-2 Vfg-1 Vfg-2 THD Vom-1 Vom-2 Von VCC/2 1 OFF ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON OFF OFF 2 - - - - - - - - - - a a b b - - - - - Switch Condition 3 4 5 - - - b b b b b b b b b a a a a b b b b - b b b b b b b b b b b b b b b b a - b b b b b b b b b b b b b b b b a - 6 b b b b b b b b b b b b b b b b b b b 7 b b b b b b b b b b b b b b b b b b b Note 1. It suffices that a or b is inserted into (-). Pin Connection Diagram VE TC 1 Detector Input 2 REF 3 Time 4 VCA TC 5 VCA WGT 6 VCC 2 7 GND 8 16 VE WGT 15 VE Input 14 VE INT 13 VE Output 12 VCA Input 11 VCA FB 10 VCA Output 9 VCC 1 16 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7) |
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