AC Test Circuit

Figure 2 shows a typical test circuit for evaluation of the LM2467. This circuit is designed to allow testing of the LM2467 in a 50

Ω

environment without the use of an expensive FET probe. The two 2490

Ω resistors form a 200:1 divider with the 50Ω resistor and

the oscilloscope. A test point is included for easy use of an oscilloscope probe.The compensation capacitor is used to

compensate the stray capacitance of the two 2490

Ω resistors to achieve flat frequency response.

DS200078-3

Note: 8 pF load includes parasitic capacitance.

FIGURE 2. Test Circuit (One Channel)

www.national.com

3