Datasheet

AD8375 Data Sheet
Rev. A | 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.