OP177
ISOLATING LARGE CAPACITIVE LOADS
The circuit in Figure 27 reduces maximum slew-rate but allows
driving capacitive loads of any size without instability. Because
the 100
Ω
resistor is inside the feedback loop, its effect on
output impedance is reduced to insignificance by the high open-
loop gain of the OP177.
Figure 26. Precision High Gain Differential Amplifier
Table II. High Gain Differential Amp Performance
Type
Common-Mode Voltage
Gain Linearity, Worst Case
TCV
OS
TCI
OS
Amount
0.1%/V
0.02%
0.0003%/°C
0.008%/°C
Figure 27. Isolating Capacitive Loads
Figure 28. Bilateral Current Source
Figure 29. Precision Absolute Value Amplifier
AD [ ANALOG DEVICES ]
