ANALOG DEVICES ADPA1113 GaN Power Amplifier User Guide

ANALOG DEVICES ADPA1113 GaN Power Amplifier

Product Information

Specifications:

• Frequency Range: 2 GHz to 6 GHz
• Power Output: 46 dBm (40 W)
• Technology: GaN Power Amplifier
• Board: 2-layer Rogers 4350B evaluation board with heat spreader
• Connectors: End launch 2.92 mm RF connectors
• Calibration Path: Through calibration path (depopulated)

Product Usage Instructions

Operating the ADPA1113-EVALZ
The DC connections required to operate the ADPA1113-EVALZ are accessed through the P1 and P2 header pins. Refer to the table below for pin descriptions:

3, 5, 7, 9, 10, 11, 12, 13, GND 14, 15, 17, 19, 21, 22, 23, 24 –
VDD3A
4 – VDD2A
6 – VDD1
P2| 1, 2, 3, 4, 5, 7, 9, 11, 12, GND 13, 14, 15, 16, 17, 19, 21 –
Open
6 – VGG1
8, 10, 18, 23, 24, 20, 22 – Open VDD2B and VDD3B respectively

Attach the ADPA1113-EVALZ to a thermal plate or a heatsink and then follow the power-up and power-down sequences below to evaluate its performance.

Power-Up Sequence:

1. Set VGG1 (Pin 6 of P2) to -4 V.
2. Set VDD1, VDD2A, VDD3A, VDD2B, and VDD3B (Pin 8, Pin 6…

FAQ

Q: What equipment is needed for operating the ADPA1113-EVALZ?

A: To operate the ADPA1113-EVALZ, you will need an RF signal generator, an RF spectrum analyzer, an RF network analyzer, a 28 V, 5 A power supply, a 0 V to -8 V, 100 mA power supply, a 50 W attenuator, an RF coupler of at least 20 dB and a power rating of at least 50 W, an RF power meter and power sensor, as well as a thermal plate or heatsink.

Q: How should I handle the power supply decoupling capacitors during operation?

A: The manual recommends maintaining the configuration shown in Figure 5 for characterizing the device. While reducing the number of capacitors is possible, it's advised to start by removing or combining the largest capacitors that are farthest from the device. The reduction of capacitors may vary depending on the system.

Q: Where can I find more detailed information about the ADPA1113?

A: For more detailed technical information about the ADPA1113-EVALZ evaluation board and its operation, refer to the ADPA1113 data sheet in conjunction with the user guide provided.

FEATURES

• 2-layer Rogers 4350B evaluation board with heat spreader
• End launch 2.92 mm RF connectors
• Through calibration path (depopulated)

EVALUATION KIT CONTENTS

• 2-layer Rogers 4350B evaluation board with heat spreader

EQUIPMENT NEEDED

• RF signal generator
• RF spectrum analyzer
• RF network analyzer
• 28 V, 5 A power supply
• 0 V to −8 V, 100 mA power supply
• 50 W attenuator ≥ 20 dB
• RF coupler 30 dB, 50 W
• RF power meter and power sensor
• Thermal plate or heatsink

GENERAL DESCRIPTION

The ADPA1113-EVALZ is a 2-layer printed circuit board (PCB) fabricated from 10 mils thick Rogers 4350B copper clad mounted to an aluminium heat spreader. The heat spreader provides thermal relief to the ADPA1113 and mechanical support to the PCB. Mounting holes on the heat spreader allow it to be attached to larger heat sinks for improved thermal management. The RFIN and RFOUT ports are populated by 2.92 mm female coaxial connectors, and their respective RF traces are of 50 Ω characteristic impedance. The ADPA1113-EVALZ is populated with components suitable for use over the entire operating temperature range of the ADPA1113.

The RF traces are 50 Ω grounded coplanar waveguides, and the package ground leads connect directly to the ground plane. Multiple vias are used to connect the top and bottom ground planes. The package base, along with an indium foil shim, is mechanically connected to the heat spreader using four, 0-80 × 3/16″ stainless steel, socket head screws to ensure adequate electrical and thermal conduction. The power supply decoupling capacitors shown in Figure 5 represent the configuration that was used to characterize the device. Note that it is possible to reduce the number of capacitors; however, this reduction varies by system. Instead, it is recommended to first remove or combine the largest capacitors that are farthest from the device.

Consult the ADPA1113 data sheet in conjunction with this user guide when working with the ADPA1113-EVALZ evaluation board.

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS.

ADPA1113-EVALZ EVALUATION BOARD

PHOTOGRAPHS

REVISION HISTORY
1/2024—Revision 0: Initial Version

OPERATING THE ADPA1113-EVALZ

The DC connections required to operate the ADPA1113-EVALZ are accessed through the P1 and P2 header pins, see Table 1 for pin descriptions.

Table 1. P1 and P2 Header Connections to the ADPA1113

Header Pin No.

|

Mnemonic

---|---
P1|
1, 2, 16, 18, 20| Open
3, 5, 7, 9, 10, 11, 12, 13,| GND
14, 15, 17, 19, 21, 22,|
23, 24|
4| VDD3A
6| VDD2A
8| VDD1
P2|
1, 2, 3, 4, 5, 7, 9, 11, 12,| GND
13, 14, 15, 16, 17, 19,|
21|
6| VGG1
8, 10, 18, 23, 24,| Open
20, 22| VDD2B and VDD3B, respectively

Attach the ADPA1113-EVALZ to a thermal plate or a heatsink and then complete the power-up and power-down sequences that follow to evaluate the performance of the ADPA1113.

POWER-UP SEQUENCE
Take the following steps to power up:

1. Set VGG1 (Pin 6 of P2) to −4 V.
2. Set VDD1, VDD2A, VDD3A, VDD2B, and VDD3B (Pin 8, Pin 6, and Pin 4 of P1 and Pin 20 and Pin 22 of P2) to 28 V.
3. Adjust VGG1 between −4 V and -1.9 V to achieve a quiescent current of 750 mA. The nominal gate voltage is approximately −2.2 V.
4. Apply the RF signal to the RFIN connector of the ADPA1113.

POWER-DOWN SEQUENCE
Take the following steps to power down:

1. Turn off the RF signal.
2. Set VGG1 to −4 V.
3. Set VDD to 0 V.
4. Set VGG1 to 0 V.

TEST SETUP DIAGRAM
See Figure 3 for the test setup diagram.

THROUGH CALIBRATION PATH

• To calibrate out board trace losses, a through (thru) calibration path is provided between J3 and J4. Both J3 and J4 must be populated with RF connectors to use the thorough calibration path.
• Figure 4 shows the plot of the data in Table 2 of the thorough calibration path (J3 to J4). See Figure 5 for the evaluation board schematic.

Table 2. Insertion Loss of Through Calibration Path

EVALUATION BOARD SCHEMATIC AND ARTWORK

ORDERING INFORMATION

BILL OF MATERIALS
Table 3. ADPA1113-EVALZ Bill of Materials

Reference Designator

| Description| Manufacturer|

Part Number

---|---|---|---
C3, C5, C8, C10, C12, C14| Ceramic capacitors, 2.2 μF, X5R, 50 V, 10%, 0603| Murata| GRM188R61H225KE11J
C4, C6, C7, C9, C11, C13| Ceramic capacitors, 1000 pF, X7R, 50 V, 10%, 0402, AEC- Q200, low effective series resistance (ESR)| TDK| CGA2B2X7R1H102K050BA
Not Applicable| 2.5 in × 2.0 in heat spreader| Not applicable| Not applicable
P1, P2| Printed circuit board (PCB) connectors, surface mount, 24- position, male header, unshrouded, double row straight, 2.54 mm pitch| Samtec, Inc.| TSM-112-01-L-DV
RFIN, RFOUT| 2.92 mm connectors, jack, EDGE_LAUNCH| Winchester Interconnect| 25-146-1000-92
J3, J4| 2.92 mm connectors, jack, EDGE_LAUNCH (not installed)| Winchester Interconnect| 25-146-1000-92
U1| 2 GHz to 6 GHz, GaN, 46 dBm (40 W) power amplifier| Analog Devices, Inc.| ADPA1113AEJZ

ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high-energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

Legal Terms and Conditions

By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the 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.

Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board, and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI.

The customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customers may not disassemble, decompile or reverse engineer chips on the Evaluation Board. The customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. The customer agrees to return to ADI the Evaluation Board at that time.

LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND CONCERNING IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. The customer agrees that it will not directly or indirectly export the Evaluation Board to another country and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed by the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.

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