The ADL8141-EVALZ is a 4-layer printed circuit board (PCB) fabricated
from 8 mil thick, Rogers 4003C and Isola 370HR, copper
clad, forming a nominal thickness of 62 mils. The RFIN and RFOUT
ports on the ADL8141-EVALZ are populated with female coaxial
2.4 mm connectors, and the corresponding RF traces have a 50
Ω characteristic impedance. The ADL8141-EVALZ is populated
with components suitable for use over the entire −40°C to +85°C
operating temperature range of the ADL8141. To calibrate board
trace losses, a through calibration path is provided between the J1
and J2 connectors. J1 and J2 must be populated with 2.4 mm RF
connectors to use the through calibration path. Refer to Table 1 and
Figure 3 in the user guide for the through calibration path performance.
Connect ground and power to ADL8141-EVALZ using the surfacemount
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 5 in the user guide for the test point assembly).
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 ADL8141-EVALZ
represent the configuration used to characterize and qualify the
device.
For full details on the ADL8141, see the ADL8141 data sheet,
which must be consulted in conjunction with the user guide when
using the ADL8141-EVALZ evaluation board.
