The ADL8101-EVALZ and ADL8101-EVAL1Z are 4-layer printed
circuit boards (PCBs) fabricated from 0.254 mm (10 mil) thick,
Isola 370HR, copper clad, forming a nominal thickness of 1.58 mm
(62 mils). The ADL8101-EVALZ is designed to support operation
from 10 MHz to 22 GHz The ADL8101-EVAL1Z is designed to
extend frequency operation down to 10 kHz and still operates up
to 22 GHz. The RFIN and RFOUT ports on the ADL8101-EVALZ
and ADL8101-EVAL1Z are populated with 2.9 mm, female coaxial
connectors, and the respective RF traces have a 50 Ω characteristic
impedance. The ADL8101-EVALZ and ADL8101-EVAL1Z are
populated with components suitable for use over the entire −55°C
to +125°C operating temperature range.
To calibrate out board trace losses, a through calibration path is
provided between the J1 and J2 connectors. J1 and J2 must be
populated with RF connectors to use the through calibration path.
Refer to Figure 11 and Table 1 for the through calibration path
performance for both the ADL8101-EVALZ and ADL8101-EVAL1Z.
Access the ADL8101-EVALZ and ADL8101-EVAL1Z ground and
drain voltage through the surface-mount technology (SMT) test
point connectors, GND and VDD. A supplementary test point for
VBIAS is included for simple access on the RBIAS pin (see Figure
12 and Figure 14 for the test point locations).
The RF traces on the ADL8101-EVALZ and ADL8101-EVAL1Z are
50 Ω, grounded coplanar waveguide. The package ground leads
and the exposed pad connect directly to the ground plane. Multiple
vias connect the top and bottom ground planes with particular focus
on the area directly beneath the ground paddle to provide adequate
electrical conduction and thermal conduction.
The power supply decoupling capacitors on the ADL8101-EVALZ
and ADL8101-EVAL1Z represent the configuration used to characterize
and qualify the device.
For full details on the ADL8101, see the ADL8101 data sheet,
which must be consulted in conjunction with this user guide when
using the ADL8101-EVALZ and/or ADL8101-EVAL1Z.
