EVAL-ADL8122

Product Details

The ADL8122-EVALZ and ADL8122-EVAL1Z are 4-layer printed circuit boards (PCBs) fabricated from 0.254 mm (10 mil) thick, Rogers 4350B and Isola 370HR, copper clad, forming a nominal thickness of 1.63 mm (64 mils). The ADL8122-EVALZ was designed to support operation from 10 MHz to 10 GHz, while the ADL8122-EVAL1Z was designed to extend frequency operation down to 10 kHz. The ADL8122-EVAL1Z still operates up to 10 GHz. The RFIN and RFOUT ports on the ADL8122-EVALZ and ADL8122-EVAL1Z are populated with Subminiature A (SMA), female coaxial connectors. The ADL8122-EVALZ and ADL8122-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 ADL8122-EVALZ and ADL8122-EVAL1Z.

Access the ADL8122-EVALZ and ADL8122-EVAL1Z ground and drain voltage through the surface-mount technology (SMT) test point connectors, GND and VDD. A supplementary test point for VRBIAS 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 ADL8122-EVALZ and ADL8122-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 ADL8122-EVALZ and ADL8122-EVAL1Z represent the configuration used to characterize and qualify the device.

For full details on the ADL8122, see the ADL8122 data sheet, which must be consulted in conjunction with this user guide when using the ADL8122-EVALZ and ADL8122-EVAL1Z.