September 2004

11

MIC862

MIC862

Micrel

Applications Information

Power Supply Bypassing

Regular supply bypassing techniques are recommended. A

10

µF 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 MIC862 is intended for single supply applications config-

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

MIC862 under either of the following conditions:

1. A grounded load and split supplies (+/-V)

2. A single supply where the load is terminated

above ground.

Under the above conditions, if the load is less than 20kOhm

and the output swing is greater than 1V(peak), there may be

some instability when the output is sinking current.

Capacitive Load

When driving a large capacitive load, a resistor of 500

Ω is

recommended to be connected between the op-amp output

and the capacitive load to avoid oscillation.