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AD8009,pdf datasheet (Low Dist
消耗积分:3 |
格式:rar |
大小:250 |
2009-09-02
杨福林
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A capacitive load, like that presented by some A/D converters,
can sometimes be a challenge for an op amp to drive depending
on the architecture of the op amp. Most of the problem is caused
by the pole created by the output impedance of the op amp and
the capacitor that is driven. This creates extra phase shift that
can eventually cause the op amp to become unstable.
One way to prevent instability and improve settling time when
driving a capacitor is to insert a resistor in series between the
op amp output and the capacitor. The feedback resistor is still
connected directly to the output of the op amp, while the series
resistor provides some
can sometimes be a challenge for an op amp to drive depending
on the architecture of the op amp. Most of the problem is caused
by the pole created by the output impedance of the op amp and
the capacitor that is driven. This creates extra phase shift that
can eventually cause the op amp to become unstable.
One way to prevent instability and improve settling time when
driving a capacitor is to insert a resistor in series between the
op amp output and the capacitor. The feedback resistor is still
connected directly to the output of the op amp, while the series
resistor provides some
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