Moteur de recherche de fiches techniques de composants électroniques |
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CS3001 Fiches technique(PDF) 8 Page - Cirrus Logic |
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CS3001 Fiches technique(HTML) 8 Page - Cirrus Logic |
8 / 16 page CS3001 CS3002 8 3.2 Open Loop Gain and Stability Compensation The CS3001 and CS3002 achieve ultra-high open loop gain. Figure 10 illustrates the amplifier in a non-inverting gain configuration. The open loop gain and phase plots indicate that the amplifier is stable for closed-loop gains less than 50 V/V. For a gain of 50, the phase margin is between 40 ° and 60° depending upon the loading conditions. As shown in Figure 11 on page 9, the op amp has an input ca- pacitance at the + and – signal inputs of typically 50 pF. This capacitance adds an additional pole in the loop gain transfer function at a frequency of f= 1/(2 πR*Cin) where R is the parallel combina- tionof R1and R2 (R1 || R2). A higher value for R produces a pole at a lower frequency, thus reducing the phase margin. R1 is recommended to be less than or equal to 100 ohms, which results in a pole at 30 MHz or higher. If a higher value of R1 is de- sired, a compensation capacitor (C2) should be added in parallel with R2. C2 should be chosen such that R2*C2 ≥ R1*C in. R1 R2 Vin Vo R S Figure 10. Non-Inverting Gain Configuration |
Numéro de pièce similaire - CS3001 |
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Description similaire - CS3001 |
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