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Evaluating the ADPA1106 46 dBm (40 W), 2.7 GHz to 3.5 GHz, GaN Power Amplifier
FEATURES
2-layer Rogers 4350B evaluation board with heat spreader
►
End launch SMA jack RF connectors
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Through calibration path
►
Drain or gate pulsing capability
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EVALUATION KIT CONTENTS
ADPA1106-EVALZ evaluation board
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50 V drain pulser board
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EQUIPMENT NEEDED
Pulse generator
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Oscilloscope
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50 V, 2 A power supply
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−4 V power supply
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Tektronix TCPA312A current probe
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Tektronix TCPA300 current probe amplifier
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RF signal generator
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Directional coupler
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RF power sensor
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RF power meter
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RF attenuator
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DOCUMENTS NEEDED
ADPA1106
data sheet
►
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
User Guide | EVAL-ADPA1106
GENERAL DESCRIPTION
The ADPA1106-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 ADPA1106-EVALZ are populated by Subminiature
Version A (SMA) female coaxial connectors, and the respective
RF traces have a 50 Ω characteristic impedance. The ADPA1106-
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 SMA RF
connectors to use the through calibration path.
Ground, power, gate control, and the detector output voltage are
provided through the two 24-pin headers (P4 and P5) on the
ADPA1106-EVALZ. The pinouts for these two headers are shown in
Table
1.
RF traces on the ADPA1106-EVALZ are 50 Ω, grounded, coplanar
waveguide. The package ground leads and the exposed paddle
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 ADPA1106-EVALZ ships with a drain pulser board that can
be plugged into the ADPA1106-EVALZ headers and configured to
control the biasing of the ADPA1106 by providing a negative gate
voltage and a control signal that connects and disconnects the
drain voltage to the ADPA1106-EVALZ. The ADPA1106-EVALZ can
also operate alone in gate pulsed mode where a negative pulse is
applied to the VGG1 and VGG2 pins of the ADPA1106.
For full details on the ADPA1106, see the ADPA1106 data sheet,
which must be consulted in conjunction with this user guide when
using the ADPA1106-EVALZ.
UG-2037
Rev. 0 | 1 of 13
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Summary of Contents for Analog Devices EVAL-ADPA1106
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Page 1: Features
User Guide | EVAL-ADPA1106 UG-2037 Evaluating the ADPA1106 46 dBm (40 W), 2.7 GHz to 3.5 GHz, GaN Power Amplifier FEATURES GENERAL DESCRIPTION 2-layer Rogers 4350B evaluation board with heat spreader The ADPA1106-EVALZ consists of a 2-layer printed circuit board ►... -
Page 2: Table Of Contents
User Guide EVAL-ADPA1106 TABLE OF CONTENTS Features..............1 Setup..............6 Evaluation Kit Contents......... 1 Operation ............6 Equipment Needed..........1 Operating the ADPA1106-EVALZ with the Documents Needed..........1 Drain Bias Pulser Board........7 General Description..........1 Setup..............8 Evaluation Board Photographs......3 Operation............9 Header Pinout............4 Making Average to Pulsed Approximations..10... -
Page 3: Evaluation Board Photographs
User Guide EVAL-ADPA1106 EVALUATION BOARD PHOTOGRAPHS Figure 2. ADPA1106-EVALZ Evaluation Board, Secondary Side Figure 1. ADPA1106-EVALZ Evaluation Board, Primary Side analog.com Rev. 0 | 3 of 13... -
Page 4: Header Pinout
User Guide EVAL-ADPA1106 HEADER PINOUT The schematic for the ADPA1106-EVALZ is shown in Figure The ADPA1106-EVALZ contains two headers, P4 and P5. Table 1 describes the pinout of these headers. Table 1. P4 and P5 Header Connections on the ADPA1106-EVALZ... -
Page 5: Insertion Loss Of The Through Calibration Path
User Guide EVAL-ADPA1106 INSERTION LOSS OF THE THROUGH CALIBRATION PATH To calibrate board trace losses, a through calibration path is provid- ed between the J6 and J5 connectors. J6 and J5 must be populated with SMA RF connectors to use the through calibration path. -
Page 6: Operating The Adpa1106-Evalz With A Pulsed Gate Voltage
User Guide EVAL-ADPA1106 OPERATING THE ADPA1106-EVALZ WITH A PULSED GATE VOLTAGE To implement gate pulsed operation, apply a negative voltage pulse to the VGG1 and VGG2 inputs of the ADPA1106 while the voltage on the VDD1 and VDD2 pins of the ADPA1106 is held constant. -
Page 7: Operating The Adpa1106-Evalz With The Drain Bias Pulser Board
ADPA1106 on and off, and the LTC7000 is a high-side, negative channel metal-oxide semiconduc- tor (NMOS), static switch driver that controls the MOSFET. Figure 4. Analog Devices, Inc., Pulser Board Schematic analog.com Rev. 0 | 7 of 13... -
Page 8: Setup
User Guide EVAL-ADPA1106 OPERATING THE ADPA1106-EVALZ WITH THE DRAIN BIAS PULSER BOARD SETUP Table 3. Pulser Board J1 to J4, TP1 to TP4, and P2 and P3 Header Connections to the ADPA1106 The connections required to use the ADPA1106-EVALZ with the... -
Page 9: Operation
User Guide EVAL-ADPA1106 OPERATING THE ADPA1106-EVALZ WITH THE DRAIN BIAS PULSER BOARD OPERATION Take the following steps to power up (unless otherwise stated, all signals are applied to the pulser board) the ADPA1106-EVALZ: 1. Set the voltage on J3 (PULSE) to 0 V. -
Page 10: Making Average To Pulsed Approximations
User Guide EVAL-ADPA1106 MAKING AVERAGE TO PULSED APPROXIMATIONS Instruments that can be triggered are required to measure the RF power, drain current, and power added efficiency (PAE) accurately under pulsed operation. When such instrumentation is not availa- ble, use averaging and approximations. The most common approxi- mations involve measuring the average values and then adjusting those values to account for the duty cycle. -
Page 11: Evaluation Board Schematic And Artwork
User Guide EVAL-ADPA1106 EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 6. ADPA1106-EVALZ Evaluation Board Schematic analog.com Rev. 0 | 11 of 13... - Page 12 User Guide EVAL-ADPA1106 EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 7. ADPA1106-EVALZ Assembly Drawing (J6 and J5 Not Installed) analog.com Rev. 0 | 12 of 13...
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Page 13: Ordering Information
Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. - Page 14 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. ADPA1106-EVALZ...
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