ANALOG DEVICES EVAL-ADL7078 High Survivability Low Noise Amplifier User Guide
- June 13, 2024
- Analog Devices
Table of Contents
User Guide | EVAL-ADL7078
UG-2151
Evaluating the ADL7078 High Survivability, Low Noise Amplifier, 1 GHz to 20 GHz
FEATURES
- 2-layer Rogers 4350B evaluation board
- End launch, 2.9 mm RF connectors
- Through calibration path (depopulated)
EVALUATION KIT CONTENTS
- ADL7078-EVALZ evaluation board
EQUIPMENT NEEDED
- RF signal generator
- RF spectrum analyzer
- RF network analyzer
- 5 V, 500 mA power supply
DOCUMENTS NEEDED
- ADL7078 data sheet
GENERAL DESCRIPTION
The ADL7078-EVALZ is a 2-layer printed circuit board (PCB) fabricated from 10
mil thick, Rogers 4350B, and copper clad.
The RFIN and RFOUT ports on the ADL7078-EVALZ are populated with 2.9 mm,
female coaxial connectors, and the corresponding RF traces have a 50 Ω
characteristic impedance. The ADL7078-EVALZ is populated with components
suitable for use over the entire −40°C to +85°C operating temperature range.
To calibrate board trace losses, a through calibration path, THRUCAL, is
provided between the J1 and J2 connectors. J1 and J2 must be populated with RF
connectors to use the through calibration path. For the through calibration
path performance, see Table 1 and Figure 4.
Access the ADL7078-EVALZ ground path and the VDD pin through the surface-mount
technology (SMT) test point connectors, GND, and VDD. A supplementary test
point for VBIAS is included for simple access on the RBIAS pin (for the test
point locations, see Figure 6).
The RF traces on the ADL7078-EVALZ are 50 Ω, grounded, coplanar waveguide. The
package ground leads and the exposed pads 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 ADL7078-EVALZ represent the
configuration used to characterize and qualify the device.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND
CONDITIONS.
Full specifications on the ADL7078 are available in the ADL7078 data sheet
available from Analog Devices, Inc., and must be consulted with this user
guide when using the ADL7078-EVALZ evaluation board.
ADL7078-EVALZ EVALUATION BOARD PHOTOGRAPHS
Figure 1.
ADL7078-EVALZ Primary Side| 
Figure 2. ADL7078-EVALZ Secondary Side
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REVISION HISTORY
10/2023—Revision 0: Initial Version
OPERATING THE ADL7078-EVALZ
A 5 V, 500 mA power supply is required to provide the bias to the ADL7078 when
using the ADL7078-EVALZ. Connect the 5 V power supply to the VBIAS and VDD
test points. Connect the ground reference to the GND test point.
For the recommended resistor values to achieve different supply currents,
refer to the ADL7078 data sheet. The default value of the external resistor,
R1, connected on the ADL7078-EVALZ is 698 Ω, which is the same value used to
characterize the ADL7078.
The following bias conditions are recommended to achieve the performance
specified in the ADL7078 data sheet: supply voltage (VDD) = 5 V, quiescent
current (IDQ) = 175 mA, and bias resistance (RBIAS) = 698 Ω.
Figure 3.
Operating Block Diagram of ADL7078-EVALZ
RECOMMENDED BIAS SEQUENCING
During Power-Up
To power up the ADL7078-EVALZ, follow this bias sequence:
- Tie VBIAS and VDD together.
- Connect the VBIAS and VDD power supply.
- Set the VBIAS and VDD supply to 5 V.
- Apply the RF input signal.
During Power-Down
To power down the ADL7078-EVALZ, follow this bias sequence:
- Turn off the RF input signal.
- Set the VBIAS and VDD supply to 0 V.
Figure 4. Insertion Loss and Return Loss of the Through
Calibration Path
Table 1. Insertion Loss of the Through Calibration Path
Frequency (GHz)| Insertion Loss (dB)| Input Return Loss (dB)|
Output Return Loss (dB)
---|---|---|---
1| −0.03| −43.9| −50.70
3| −0.14| −35.6| −41.40
5| −0.26| −32.32| −30.77
7| −0.36| −25.39| −25.08
9| −0.43| −33.40| −31.92
11| −0.53| −22.17| −22.16
13| −0.67| −17.38| −17.26
15| −0.70| −20.14| −20.03
17| −0.74| −28.62| −29.02
19| −1.01| −14.44| −14.75
21| −1.17| −13.91| −14.02
23| −1.11| −22.94| −27.57
25| −1.59| −10.48| −10.65
EVALUATION BOARD SCHEMATIC AND ASSEMBLY DRAWING
Figure 5.
ADL7078-EVALZ Schematic
Figure 6. ADL7078-EVALZ Assembly Drawing
(J1 and J2 Are Not Installed)
ORDERING INFORMATION
BILL OF MATERIALS
Table 2. ADL7078-EVALZ Bill of Materials
Reference Designator| Description| Manufacturer| Part
Number
---|---|---|---
C1| Ceramic capacitor, 0.01 µF, 25 V, 5%, X7R, 0402| Kemet| C0402C103J3RACTU
C2, C3| Capacitor, 100 pF, 50 V, 5%, 0402| Samsung| CL05C101JB5NNNC
RFIN, RFOUT| Connectors, 2.9 mm, jack edge| SRI Connector Gage Co.|
25-146-1000-92
VDD, AGND, VBIAS| Connectors, SMT test points| Keystone Electronics| 5016
J1, J2| Connectors, 2.9 mm, jack edge, do not install (DNI)| SRI Connector
Gage Co.| 25-146-1000-92
R1| Resistor, 698 kΩ, surface-mount device (SMD), 1%, 1/10 W, 0402| Panasonic|
ERJ2RKF6980X
R2| Resistor, 0 Ω, SMD, jumper, 1/10 W, 0402 (DNI)| Panasonic| ERJ-2GE0R00X
U1| Gallium arsenide (GaAs), pseudomorphic high electron mobility transistor
(pHEMT), monolithic microwave integrated circuit (MMIC), 1 GHz to 20 GHz|
Analog Devices, Inc.| ADL7078
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
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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
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GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE,
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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.
©2023 Analog Devices, Inc. All rights reserved.
Trademarks and
registered trademarks are the property of their respective owners.
One Analog Way, Wilmington, MA 01887-2356, U.S.A.
Rev. 0
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EVAL-ADL7078 High Survivability Low Noise Amplifier, EVAL-ADL7078, High
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Noise Amplifier, Noise Amplifier, Amplifier
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