AD5539 Ver la hoja de datos (PDF) - Analog Devices

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Fabricante

AD5539

Operational Amplifier Ultrahigh Frequency

Analog Devices 

AD5539

Figure 25. A Gain of 3 Follower with Both Lead and Lag

Compensation

Figure 28. Response of the Gain of 3 Follower with CLEAD,

CLAG and RLAG

These same principles may be applied when capacitor CLEAD is

connected to Pin 12 (Figure 29). Figure 30 shows the band-

width of the gain of 3 amplifier for various values of RLAG. It can

be seen from these response plots that a high noise gain is still

needed to achieve a reasonably flat response (the smaller the

Figure 26. Response of the Gain of 3 Follower Circuit

Adding a lag capacitor (Figure 27) will greatly reduce the

midband and low frequency noise gain of the circuit while sacri-

ficing only a small amount of bandwidth as shown in Figure 28.

Figure 29. A Gain of 3 Follower Circuit with CLEAD

Compensation Connected to Pin 12

Figure 27. A Gain of 3 Follower Circuit with Both CLEAD

and RLAG Compensation

Figure 30. Response of the Gain of 3 Follower Circuit with

CLEAD Connected to Pin 12

–10–

REV. B

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