User Guide
UG-1962
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
45 dBm (35 W), GaN Power Amplifier, 4.8 GHz to 6.0 GHz
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 14
FEATURES
2-layer Rogers 4350B evaluation board with heat spreader
End launch 2.92 mm (K) jack RF connectors
Through calibration path
Drain or gate pulsing capability
EVALUATION KIT CONTENTS
ADPA1107-EVALZ evaluation board
30 V drain pulser board
EQUIPMENT NEEDED
Pulse generator
Oscilloscope
28 V, 3 A power supply
−4 V power supply
Tektronix TCPA312A current probe
Tektronix TCPA300 current probe amplifier
RF signal generator
Directional coupler
RF power sensor
RF power meter
RF attenuator
DOCUMENTS NEEDED
ADPA1107 data sheet
GENERAL DESCRIPTION
The ADPA1107-EVALZ consists of a 2-layer printed circuit
board (PCB) fabricated from a 10 mil thick, Rogers 4350B
copper clad mounted to an aluminum heat spreader. The heat
spreader assists in providing thermal relief to the device as well
as mechanical support to the PCB. Mounting holes on the heat
spreader allow the spreader to be attached to a heat sink.
Alternatively, the spreader can be clamped to a hot and cold
plate. The RFIN and RFOUT ports on the ADPA1107-EVALZ
are populated by 2.92 mm (K) female coaxial connectors, and
the respective RF traces have a 50 Ω characteristic impedance. The
ADPA1107-EVALZ is populated with components suitable for
use over the entire operating temperature range of the device. To
calibrate board trace losses, a through calibration path is
provided between the J6 and J5 connectors. J6 and J5 must be
populated with 2.92 mm (K) female coaxial connectors to use
the through calibration path.
The ground, power, gate control, and detector output voltage
are provided through two test points (TP1 and TP2) and two
24-pin headers (J3 and J4) on the ADPA1107-EVALZ. The
pinouts for these four headers are detailed in Table 1.
RF traces on the ADPA1107-EVALZ 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 pad to provide adequate electrical
conduction and thermal conduction to the heat spreader.
The ADPA1107-EVALZ ships with a drain pulsing board
(pulser board) that can be plugged into the ADPA1107-EVALZ
headers and configured to control the biasing of the ADPA1107
by providing a negative gate voltage and a control signal that
connects and disconnects the drain voltage to the ADPA1107-
EVALZ. The ADPA1107-EVALZ can also operate alone in gate
pulsed mode where a negative pulse is applied to the VGG1 pin
of the ADPA1107.
For full details on the ADPA1107, see the ADPA1107 data
sheet, which must be consulted in conjunction with this user
guide when using the ADPA1107-EVALZ.
