January 2005

13

MIC863

MIC863

Micrel

Applications Information

Power Supply Bypassing

Regular supply bypassing techniques are recommended. A

10µF capacitor in parallel with a 0.1µF capacitor on both the

positive and negative supplies are ideal. For best perfor-

mance all bypassing capacitors should be located as close to

the op amp as possible and all capacitors should be low ESL

(equivalent series inductance), ESR (equivalent series resis-

tance). Surface-mount ceramic capacitors are ideal.

Supply and Loading Resistive Considerations

The MIC863 is intended for single supply applications config-

ured with a grounded load. It is not advisable to operate the

MIC863 under either of the following conditions when the load

is less than 20kΩ and the output swing is greater than

1V(peak-to-peak):

1). A grounded load and split supplies (±V) or

2). A single supply where the load is terminated above

ground.

Under the above conditions, there may be some instability

when the output is sinking current.