OP177

Figure 26. Precision High Gain Differential Amplifier

Table II. High Gain Differential Amp Performance

Type

Amount

Common-Mode Voltage

0.1%/V

Gain Linearity, Worst Case

0.02%

0.0003%/°C

0.008%/°C

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 27. Isolating Capacitive Loads

Figure 28. Bilateral Current Source

Figure 29. Precision Absolute Value Amplifier