OPA336MDBVREP datasheet(10/15 Pages) TI1

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APPLICATION INFORMATION (CONTINUED)

Resistive Load (k

Ω)

100

10k

100

Operation Above Selected Gain

Curve Not Recommended

G = +1

S = +5 V, VO = VS/2

RL to VS/2

RL to Ground

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

RL = 100 kΩ and RS = 100 Ω, there is only about a 0.1% error at the output.

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

is connected. With G = 1 and RL = 10 kΩ connected to VS/2, the OPA336 typically can drive 500 pF. Connecting

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

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OPA336MDBVREP 데이터시트(PDF) 10 Page - Texas Instruments