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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA7540N датащи(PDF) 15 Page - STMicroelectronics |
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TDA7540N датащи(HTML) 15 Page - STMicroelectronics |
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15 / 76 page  TDA7540N Electrical specifications 15/76 Adjacent channel gain Gmin Gain minimum ACG=0 32 dB Gmax Gain maximum ACG=1 38 dB Adjacent channel filter fHP -3dB frequency highpass ACF=0 100 kHz fBP Centre frequency ACF=1 100 kHz f-20dB Attenuation 20dB 70 kHz Adjacent channel output V23 Output voltage low 0.1 V V23 Output voltage high 4.9 V ROUT Output resistance 3.5 4.5 5.5 k Ω Multipath channel gain Gmin Gain minimum MPG=0 12 dB Gmax Gain maximum MPG=1 23 dB Multipath bandpass filter fBP19 Centre frequency MPF=0 19 kHz fBP31 Centre frequency MPF=1 31 kHz Q Quality factor 5 8 10 Multipath output V24 Output voltage low 0.1 V V24 Output voltage high 4.9 V ROUT Output resistance 3 k Ω ISS (intelligent Selectivity System) Filter 450kHz fcentre Centre frequency fREF_intern = 450kHz 450 kHz BW 3dB Bandwidth, -3dB ISS80 = 1 70 80 90 kHz BW 20dB Bandwidth, -20dB ISS80 = 1 132 150 168 kHz BW 3dB Bandwidth, -3dB ISS80 = 0 106 120 135 kHz BW 20dB Bandwidth, -20dB ISS80 = 0 220 250 280 kHz BW 3dB Bandwidth weather band ISS30 = 1 20 30 40 kHz BW 20dB -20dB weather band ISS30 = 1 56 80 104 kHz Table 6. FM section electrical characteristics (continued) (Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V, fRF = 98MHz, dev= 40kHz, fMOD = 1kHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified). Symbol Parameter Test conditions Min. Typ. Max. Unit |
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