OPamp Rauschberechnung Signalquelle: Quellenwiderstand: Rs ΩkΩMΩ Temperatur des Quellenwiderstands: Ts K°C Signalamplitude (RMS): Vs oder Is µVmVVpAnAµAmA Bandbreite BW HzkHzMHz Temperatur der Quelle K Signalstärke der Quelle µV RMS dBV dBu Thermisches Eingangsrauschen µV RMS dBV dBu SNR der Quelle dB Auswahl des OPAMP Op-amp type: Numerische EingabeAD549J --- 35 nV/√Hz --- 0.00022 pA/√Hz @ 1 kHzAD549L --- 35 nV/√Hz --- 0.00011 pA/√Hz @ 1 kHzAD745J --- 3.2 nV/√Hz --- 0.0069 pA/√Hz @ 1 kHzAD797A --- 0.9 nV/√Hz --- 2 pA/√Hz @ 1 kHzAD820 --- 16 nV/√Hz --- 0.0008 pA/√Hz @ 1 kHzAD828 --- 10 nV/√Hz --- 0.0015 pA/√Hz @ 1 kHzLM833 --- 4.5 nV/√Hz --- 0.5 pA/√Hz @ 1 kHzLT1115 --- 0.9 nV/√Hz --- 1.2 pA/√Hz @ 1 kHzLT1028 --- 0.85 nV/√Hz --- 1.0 pA/√Hz @ 1 kHzMC33078 --- 4.5 nV/√Hz -- 0.5 pA/√Hz @ 1 kHzNE5532 --- 5 nV/√Hz --- 0.7 pA/√Hz @ 1 kHzOPA111AM --- 8 nV/√Hz ---- 0.0005 pA/√Hz @ 1 kHzOPAx32 --- 8 nV/√Hz --- 0.003 pA/√Hz @ 1 kHzOPAx34 --- 8 nV/√Hz --- 0.003 pA/√Hz @ 1 kHzOPA1612, 1611 --- 1.1 nV/√Hz --- 0.0017 pA/√Hz @ 1 kHzOPA1656, 1611 --- 2.9 nV/√Hz --- 0.006 pA/√Hz @ 1 kHzOPA2244 --- 22 nV/√Hz --- 0.04 pA/√Hz @ 1 kHzOPA2604 --- 11 nV/√Hz --- 0.006 pA/√Hz @ 1 kHzOPA27 --- 3.2 nV/√Hz --- 0.4 pA/√Hz @ 1 kHzOPAx350 --- 5 nV/√Hz --- 0.4 pA/√Hz @ 1 kHzTL072 --- 18 nV/√Hz --- 0.004 pA/√Hz @ 1 kHzTLC2201 --- 8 nV/√Hz --- 0.0006 pA/√Hz @ 1 kHzTLC2262 --- 12 nV/√Hz --- 0.0006 pA/√Hz @ 1 kHzTLC2272 --- 9 nV/√Hz --- 0.0006 pA/√Hz @ 1 kHzTLE2072 --- 12 nV/√Hz --- 0.0028 pA/√Hz @ 10 kHz Unoise nV /√Hz Inoise (+) pA /√Hz Inoise (−) pA /√Hz Temperatur des OPAMP: Temperatur des OPAMP: Ta K°C Nichtinvertierender Verstärker Abbild 3. R1 = ΩkΩMΩ R2 = ΩkΩMΩ 0 Ω nicht erlaubt. Ist R2 vorhanden?janein R3 = ΩkΩMΩ 0 Ω nicht erlaubt. Ist R3 vorhanden?janein Eingangsrauschen Rauschverstärkung Ausgangsrauschen Rs µV RMS V/V µV RMS R1 µV RMS V/V µV RMS R2 µV RMS V/V µV RMS R3 µV RMS V/V µV RMS UR µV RMS V/V µV RMS Inoise(+) pA RMS V/A µV RMS Inoise(−) pA RMS V/A µV RMS Ura µV RMS dBV dBu UAusgang µV RMS dBV dBu SNR dB NF dB Invertierender Verstärker Abbildung 4. R1 Ω kΩ MΩ 0 Ω nicht erlaubt R2 Ω kΩ MΩ R3 Ω kΩ MΩ 0 Ω nicht erlaubt. Ist R3 vorhanden? ja nein R4 Ω kΩ MΩ Eingangsrauschen Rauschverstärkung Ausgangsrauschen Rs µV RMS V/V µV RMS R1 µV RMS V/V µV RMS R2 µV RMS V/V µV RMS R3 µV RMS V/V µV RMS R4 µV RMS V/V µV RMS UR µV RMS V/V µV RMS Inoise(+) pA RMS V/A µV RMS Inoise(−) pA RMS V/A µV RMS Ura µV RMS dBV dBu UAusgang µV RMS dBV dBu SNR dB NF dB