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APPLICATION INFORMATION (CONTINUED)

Resistive Load (k

Ω)

10

5

100

10k

1k

100

Operation Above Selected Gain

Curve Not Recommended

G = +1

V

OPA336-EP

SINGLE-SUPPLY MICRO-POWER CMOS OPERATIONAL AMPLIFIER

MicroAmplifier™ SERIES

SCES658 – JUNE 2006

Figure 5. Stability — Capacitive Load vs Resistive Load

Alternatively, the resistor may be connected in series with the output outside of the feedback loop. However, if

there is a resistive load parallel to the capacitive load, it and the series resistor create a voltage divider. This

introduces a DC error at the output; however, this error may be insignificant. For instance, with

Figure 5 shows the recommended operating regions for the OPA336. Decreasing the load resistance generally

improves capacitive load drive. Figure 5 also shows how stability differs, depending on where the resistive load

the same load to ground improves capacitive load drive to 1000 pF.

10

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