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 Consumption Current Decode Characteristics Symbol Min Typ Max Unit No Signal 4.0 5.0 6.3 mA Vod-1 Vi = -5dB, f = 300Hz 5.5 7.0 8.5 dB Vod-2 Vi = -15dB, f = 300Hz -14.5 -13.0 -11.5 dB Vod-3 Vi = -30dB, f = 300Hz -44.5 -43.0 -41.5 dB Vod-4 Vi = 0dB, f = 1kHz 1.3 3.3 5.3 dB Vod-5 Vi = -10dB, f = 1kHz -19.4 -17.4 -15.4 dB Vod-6 Vi = -20dB, f = 1kHz -39.6 -37.6 -35.6 dB Vod-7 Vi = 0dB, f = 8kHz -4.3 -1.8 0.7 dB Vod-8 Vi = -10dB, f = 8kHz -30.9 -28.4 -25.9 dB Vod-9 Vi = -20dB, f = 8kHz -45.2 -42.7 -40.2 dB ICC Test Conditions Electrical Characteristics (Cont'd): (TA = +25C, VCC = +9V Reference Level: 0dB = -5dBm (436mVrms) unless otherwise specified) Parameter VCA Filter Characteristics Vemp. Filter Characteristics Total Harmonic Distortion Ratio Maximum Output Voltage Symbol Test Conditions Min Typ Max Unit Vfp-1 f = 3kHz, Vi = 0dB, refer to 1kHz -5.5 -4.0 -2.5 dB Vfp-2 f = 8kHz, Vi = 0dB, refer to 1kHz -13.0 -11.0 -9.0 dB Vfg-1 f = 5kHz, Vi = 0dB, refer to 8kHz -9.4 -7.4 -5.4 dB Vfg-2 f = 2kHz, Vi = 0dB, refer to 8kHz -32.3 -28.8 -25.3 dB THD f = 1kHz, Vi = -3dB - 0.1 0.3 % Vom-1 f = 300Hz, THD = 1.5% 11.0 12.5 - dB Vom-2 f = 8kHz, THD = 1.5% -2.0 1.0 - dB - -104 -80 dB Output Noise Level Von Timing Current Itime (7.1) 7.5 (7.9) A VCC/2 4.3 4.5 4.7 V Center Potential 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 Switch Condition 3 4 5 - - - ICC 1 OFF 2 - Vod-1 Vod-2 Vod-3 Vod-4 Vod-5 Vod-6 Vod-7 Vod-8 Vod-9 ON ON ON ON ON ON ON ON ON - - - - - - - - - b b b b b b b b b b b b b b b b b b Vfp-1 Vfp-2 ON ON a a a a Vfg-1 Vfg-2 THD ON ON ON b b - Vom-1 Vom-2 Von VCC/2 ON ON OFF OFF - - - - Note 1. It suffices that a or b is inserted into (-). 6 b 7 b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b a a b b b b b b b b b b b b b b b b - b b a - b b a - b b b b b b b b Pin Connection Diagram VE TC 1 16 VE WGT Detector Input 2 15 VE Input REF 3 14 VE INT Time 4 13 VE Output VCA TC 5 12 VCA Input VCA WGT 6 11 VCA FB VCC 2 7 10 VCA Output GND 8 16 9 VCC 1 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)