AD633

Data Sheet

Rev. K | Page 16 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 42 is a

photograph of the AD633 evaluation board.

Figure 42. AD633 Evaluation Board

Any dual-polarity power supply capable of providing 10 mA or

greater is all that is required to perform the intended tests, in

addition to whatever test equipment the user wants.

Referring to the schematic in Figure 49, 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 the

impedance of an input source 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 43 through Figure 46 are the signal, power, and ground-

plane artworks, and Figure 47 shows the component and circuit

side silkscreen. Figure 48 shows the assembly.

Figure 43. Component Side Copper

Figure 44. Circuit Side Copper

Figure 45. Inner Layer Ground Plane