AD8375ACPZ-R7 datasheet(18/24 Pages) AD

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AD8375

Data Sheet

Rev. B | Page 18 of 24

EVALUATION BOARD

Figure 46 shows the schematic of the AD8375 evaluation board.

The silkscreen and layout of the component and circuit sides

are shown in Figure 47 through Figure 50. The board is powered

by a single supply in the 4.5 V to 5.5 V range. The power supply

is decoupled by 10 µF and 0.1 µF capacitors at each power supply

pin. Additional decoupling, in the form of a series resistor or

inductor at the supply pins, can also be added. Table 6 details

the various configuration options of the evaluation board.

The output pins of the AD8375 require supply biasing with

1 µH RF chokes. Both the input and output pins must be ac-

coupled. These pins are converted to single-ended with a pair of

baluns (Mini-Circuits TC3-1T+ and M/A-COM ETC1-1-13).

The balun at the input, T1, is used to transform a 50 Ω source

impedance to the desired 150 Ω reference level. The output

balun, T3, and the matching components are configured to

provide a 150 Ω to 50 Ω impedance transformation with an

insertion loss of about 11 dB.

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