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AD6652BBC Datasheet(PDF) 30 Page - Analog Devices |
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AD6652BBC Datasheet(HTML) 30 Page - Analog Devices |
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30 / 76 page ![]() AD6652 Rev. 0 | Page 30 of 76 FREQUENCY TRANSLATION (FOR EXAMPLE, SINGLE 1MHz CHANNEL TUNED TO BASEBAND) AFTER FREQUENCY TRANSLATION NCO TUNES SIGNAL TO BASEBAND DC SIGNAL OF INTEREST IMAGE SIGNAL OF INTEREST WIDEBAND INPUT SPECTRUM WIDEBAND INPUT SPECTRUM (FOR EXAMPLE, 30MHz FROM HIGH SPEED ADC) f /2 f /4 S S S f /8 –fS/8 –fS/4 –fS/2 –3 fS/16 –3 fS/8 –5 fS/16 –fS/1 3 f /8 5 f /16 (– fSAMPLE/2 TO + fSAMPLE/2) 6 DC fS/2 –fS/8 –fS/4 S S S S 3 f /16 f /16 fS/4 fS/8 –fS/2 3 fS/8 5 fS/16 –3 fS/16 –3 fS/8 –5 fS/16 –fS/16 Figure 45. AD6652 Frequency Translation 3 fS/16 fS/16 of Wideband Input Spectrum –1.53 104 –1.03 104 1.03 104 1. kHz –120 –5000 0 5000 20 53 104 –40 –60 –80 –100 0 –20 –1000 kHz –800 –600 –400 –200 0 200 400 600 800 1000 ns. Narrower Filter (right) Designed for EDGE Application 1.6 kSPS DDC Output Rate) –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 10 ificatio te and 54 Figure 46. Filter Response (left) Meets UMTS (Wideband) Spec (65 MSPS ADC Conversion Ra |
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