Gast
#7078413
Schaltung aus dem Dateblatt des LTC2280. Ist hier der Eingang auf 50 oder 100 Ohm terminert. Oder ist jeder Differenzialeingang auf 50 terminert. Zitat: Figure 3 shows the LTC2280 being driven by an RF transformer with a center tapped secondary. The second- ary center tap is DC biased with VCM, setting the ADC input signal at its optimum DC level. Terminating on the trans- former secondary is desirable, as this provides a common mode path for charging glitches caused by the sample and hold. Figure 3 shows a 1:1 turns ratio transformer. Other turns ratios can be used if the source impedance seen by the ADC does not exceed 100 Ω for each ADC input.
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