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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA7540B датащи(PDF) 14 Page - STMicroelectronics |
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TDA7540B датащи(HTML) 14 Page - STMicroelectronics |
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14 / 75 page  Electrical specifications TDA7540B 14/75 3.2.3 AM section Table 6. Electrical Characteristics (Tamb = 25°C, VCC1 = VCC2 = VCC3 = VCCST= VCCVCO = VCCMIX1 = VCCMIX2 = VCCIF1 = 8.5V, fRF = 98MHz, m= 30%, fMOD = 400kHz, fXtal = 10.25MHz, in application circuit, unless otherwise specified). Item Symbol Parameter Test Conditions Min. Typ. Max. Unit 17 Global 17.1 VANT_us Usable sensitivity (S+N)/N = 26 dB 25 19 dB µV 17.2 ∆V ANT IF2 AGC Range Ref.: VINRF = 60dBµV, 50 52 dB 17.3 (S+N)/N Signal to Noise Ratio Ref.: VINRF = 60dBµV50 55 dB 17.4 aIF IF rejection Ref: VINRF = 60dBµV, IF = 10.7MHz 70 80 dB 17.5 fAF Frequency response Ref.: VINRF = 60dBµV, ∆VAF = -3 dB 3.6 kHz 17.6 THD Total Harmonic Distortion VINRF = 60dBµV, m = 0.8 m = 0.3 VINRF = 120 dBµV, m = 0.8 m = 0.3 0.5 0.3 1.0 0.3 % 17.7 V53 AF output level VINRF = 60dBµV 190 mVRMS 17.8 V24 IF output level VINRF = 60dBµ, m=off 190 mVRMS 17.9 V4 Min. RF AGC threshold Max. RF AGC threshold WAGC 90 109 dB µV dB µV 17.10 V71 Min. IF AGC threshold Max. IF AGC threshold WAGC 90 109 dB µV dB µV 17.11 V71 Min. DAGC threshold Max. DAGC threshold DAGC 74 96 dB µV dB µV 17.12 |I78max| AGC2 charge current seek 160 µA 17.13 CCR Charge current ratio seek/seek off 30 18 AGC Voltage Driver Output 18.1 V6 Max. AGC output voltage 3.5 V 18.2 V6 Min. AGC output voltage 0.5 V 18.3 | I6 | AGC current 100 µA 19 AGC PIN Diode Driver Output 19.1 I7 AGC driver current -2 mA 20 AM Mixer1 (10.7MHz) 20.1 RIN Input resistance differential 100 k Ω 20.2 CIN Input capacitance differential 4 pF 20.3 ROUT Output impedance differential 100 k Ω |
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