LMV821-N Datasheet, PDF (15/37 Pages) Texas Instruments – LMV821-N/LMV822-N/LMV822-N-Q1/LMV824/LMV824-N-Q1 Single/Dual/Quad Low Voltage

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LMV821-N, LMV822-N, LMV822-N-Q1
LMV824-N, LMV824-N-Q1
SNOS032G – AUGUST 1999 – REVISED NOVEMBER 2013
Figure 33. Unity-Gain Frequency vs Common Mode Voltage for Various Loads
UNITY GAIN PULSE RESPONSE CONSIDERATION
A pull-up resistor is well suited for increasing unity-gain, pulse response stability. For example, a 600 Ω pull-up
resistor reduces the overshoot voltage by about 50%, when driving a 220 pF load. Figure 34 shows how to
implement the pull-up resistor for more pulse response stability.
Figure 34. Using a Pull-up Resistor at the Output for Stabilizing Capacitive Loads
Higher capacitances can be driven by decreasing the value of the pull-up resistor, but its value shouldn't be
reduced beyond the sinking capability of the part. An alternate approach is to use an isolation resistor as
illustrated in Figure 35 .
Figure 36 shows the resulting pulse response from a LMV824, while driving a 10,000 pF load through a 20Ω
isolation resistor.
Figure 35. Using an Isolation Resistor to Drive Heavy Capacitive Loads
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