ANALOG DEVICES EVAL-ADPA9007 2 W Power Amplifier User Guide

ANALOG DEVICES EVAL-ADPA9007 2 W Power Amplifier

Specifications

• Frequency Range: DC to 28 GHz
• Technology: GaAs pHEMT
• Power Output: 2 W
• Evaluation Board: 2-layer Rogers 4350B with heat spreader
• Connectors: End launch 2.92 mm RF connectors

Operating the ADPA9007-EVALZ
The DC connections required to operate the EVAL-ADPA9007 areaccessed through the J3 and J4 header pins. Refer to Table 1 for pin descriptions. Figure 3 shows the connections necessary to operate the EVAL-ADPA9007.

FAQ

Q: What equipment is needed for operating the EVAL-ADPA9007?
A: You will need an RF signal generator, RF spectrum analyzer, RF network analyzer, 15 V, 1.0 A power supply, 0 V to -2.0 V, 10 mA power supply, 5 V, 100 mA power supply, DC block, Bias tee, 5 W] attenuator, and a 10 dB attenuator.

Evaluating the ADPA9007 DC to 28 GHz, GaAs, pHEMT, 2 W Power Amplifier

FEATURES

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

EVALUATION KIT CONTENTS

• 2-layer Rogers 4350B, EVAL-ADPA9007 evaluation board with heat spreader

EQUIPMENT NEEDED

• RF signal generator
• RF spectrum analyzer
• RF network analyzer
• 15 V, 1.0 A power supply
• 0 V to −2.0 V, 10 mA power supply
• 5 V, 100 mA power supply
• DC block, Marki Microwave, DCZM29F29 or equivalent
• Bias tee, Marki Microwave, BT20050 or equivalent
• 5 W attenuator ≥ 10 dB

GENERAL DESCRIPTION

• The EVAL-ADPA9007 consists of a 2-layer printed circuit board (PCB) fabricated from 10 mil thick Rogers 4350B copper clad mounted to an aluminum heat spreader. The heat spreader assists in providing thermal relief to the ADPA9007 and mechanical support to the PCB. The mounting holes on the heat spreader allow for attachment to larger heat sinks to improve thermal management.
• The RFIN and RFOUT/VDD ports are populated by 2.92 mm female coaxial connectors, and the respective RF traces are of 50 Ω characteristic impedance. The EVAL-ADPA9007 is populated with components suitable for use over the entire operating temperature range of the ADPA9007.
• The RF transmission lines are 50 Ω grounded coplanar waveguides.
• The package ground leads and the exposed pad connect directly to the ground plane. Multiple vias are used to 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 to the heat spreader.
• The power supply decoupling capacitors shown in the Figure 5 represent the configuration used in characterizing the device.Full details about the part are available in the ADPA9007 data sheet, which must be consulted when using the EVAL-ADPA9007.

REVISION HISTORY
11/2023—Revision 0: Initial Version

OPERATING THE

ADPA9007-EVALZ

The DC connections required to operate the EVAL-ADPA9007 are accessed through the J3 and J4 header pins (see Table 1 for pin descriptions). Figure 3 shows the connections necessary to operate the EVAL-ADPA9007.
The on-chip temperature monitor provides a voltage that is proportional to the temperature. To use this feature, apply +5 V to the VBTEMP pin and monitor the corresponding voltage on the VTEMP pin. User calibration is required.
An on-chip power monitor is provided to allow for convenient monitoring of the power present at the output of the ADPA9007. To use this feature, apply +5 V to VDET_B and VREF_B and monitor the voltage on the VREF pin and the VDET pin. The temperature-compensated voltage proportional to the ADPA9007 output power is (VREF − VDET). User calibration is required when using this feature.

POWER-UP SEQUENCE

Take the following steps to power up:

1. Set the VGG1 pin (Pin 10 of J4) to −2 V.
2. Set the RFOUT/VDD pin to +15 V through an external bias tee.
3. Adjust the VGG1 pin between −2 V and 0 V to achieve a quiescent drain current of 500 mA.
4. To operate the on-chip temperature monitor and on-chip power detectors, apply +5 V to the VREF_B, VBTEMP, and VDET_B pins (Pin 2 and 12 of J4 and Pin 2 of J3).
5. Apply the RF signal to the RFIN connector of the EVAL-AD-PA9007.

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

1. Turn off the RF signal
2. Set the gate voltage (VGG1) to −2 V
3. Set the supply voltage (VDD) to 0 V
4. Set the VREF_B, VBTEMP, and VDET_B pins to 0 V
5.  Increase the VGG1 pin to 0 V

Table 1. J3 and J4 Header Connections to the ADPA9007

J3|
---|---
1, 3, 5, 7, 9, 11, 13| GND
2| VDET_B
4| VDET
6, 8, 10, 12, 14| Open (do not use)
J4|
1, 3, 5, 7, 9, 11, 13| GND
2| VREF_B
4| VREF
6, 8| Open (do not use)
10| VGG1
12| VBTEMP
14| VTEMP

OPERATING THE ADPA9007-EVALZ

**THROUGH CALIBRATION PATH

**

To calibrate out board trace losses, a through calibration path is provided. J5 and J6 must be populated with 2.92 mm RF connectors to use the through calibration path.
Figure 4 shows the plot of the data in Table 2 of the through calibration path (J5 to J6). See Figure 5 for the evaluation board schematic.

Table 2. Insertion Loss of Through Calibration Path

EVALUATION BOARD SCHEMATIC AND ARTWORK

EVALUATION BOARD SCHEMATIC AND ARTWORK

ORDERING INFORMATION

BILL OF MATERIALS
Table 3.

C7, C10, C12| Ceramic capacitors, 4.7 μF, 50 V, 10%, X5R, 0805, low effective series resistance| TDK Corporation| C2012X5R1H475K125AB
---|---|---|---
C6, C9, C11| Ceramic capacitors, 0.01 μF, 25 V, 10%, X7R, 0402| KEMET Corporation| C0402C103K3RACTU
C8 ,C13| Ceramic capacitors, 100 pF, 50 V, 5%, C0G, 0402| YAGEO| CC0402JRNPO9BN101
C3, C5| Ceramic capacitors, 10 pF, 50 V, 5%, C0G, 0402| Johanson Dielectrics| 500R07N100JV4T
J1, J2| Edge launch jack connectors| Winchester Interconnect| 25-146-1000-92
J3, J4| PCB connection header, 2 mm pitch, dual row with peg, 0.5 mm square post and 3.8 mm long| Molex| 87759-1450
U1| GaAs, pHEMT, 2 W, DC to 28 GHz power amplifier| Analog Devices, Inc.| ADPA9007ACGZN
C4| Ceramic capacitor, 100 pF, 50 V, 5%, C0G, 0402 (not installed)| YAGEO| CC0402JRNPO9BN101
J5, J6| Edge launch jack connectors (not installed)| Winchester Interconnect| 25-146-1000-92
R1, R2| Resistors, 40.2 kΩ, 1%, 1/10 W 0603 AEC-Q200| Vishay| CRCW060340K2FKEA
Not applicable| Aluminum heat spreader, 2.51 in × 1.9 in| Not applicable| Not applicable

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. 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. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. 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. 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 WITH RESPECT TO 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. 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 in accordance with 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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