Data Sheet

AD633

Rev. J | Page 13 of 20

EVALUATION BOARD

The evaluation board of the AD633 enables simple bench-top

experimenting to be performed with easy control of the

AD633. Built-in flexibility allows convenient configuration

to accommodate most operating configurations. Figure 24 is

a photograph of the AD633 evaluation board.

Figure 24. AD633 Evaluation Board

Any dual-polarity power supply capable of providing 10 mA

or greater is all that is required, in addition to whatever test

equipment the user wishes to perform the intended tests.

Referring to the schematic in Figure 31, inputs to the multiplier are

differential and dc-coupled. Three-position slide switches enhance

flexibility by enabling the multiplier inputs to be connected to

an active signal source, to ground, or to a test loop connected

directly to the device pin for direct measurements, such as bias

current. Inputs may be connected single ended or differentially,

but must have a dc path to ground for bias current. If an input

source’s impedance is non-zero, an equal value impedance must

be connected to the opposite polarity input to avoid introducing

additional offset voltage.

The AD633-EVALZ can be configured for multiplier or divider

operation by switch S1. Refer to Figure 16 for divider circuit

connections.

Figure 25 through Figure 28 are the signal, power, and ground-

plane artworks, and Figure 29 shows the component and circuit

side silkscreen. Figure 30 shows the assembly.

Figure 25. Component Side Copper

Figure 26. Circuit Side Copper

Figure 27. Inner Layer Ground Plane