ANALOG DEVICES ADL8105 High Linearit Evaluating Wideband User Guide
- June 16, 2024
- Analog Devices
Table of Contents
User Guide | EVAL-ADL8105
UG-2051
FEATURES
► 4-layer Rogers 4350B and Isola 370HR evaluation board
► End launch, 2.9 mm RF connectors
► Through calibration path (depopulated)
EVALUATION KIT CONTENTS
► ADL8105-EVALZ evaluation board
EQUIPMENT NEEDED
► RF signal generator
► RF spectrum analyzer
► RF network analyzer
► 5 V, 300 mA power supply
GENERAL DESCRIPTION
The ADL8105-EVALZ consists of a 4-layer printed circuit board (PCB) fabricated
from 10 mil thick, Rogers 4350B and Isola 370HR, copper clad, forming a
nominal thickness of 62 mils. The RFIN and RFOUT ports on the ADL8105-EVALZ
are populated with 2.9 mm, female coaxial connectors, and the corresponding RF
traces have a 50 Ω characteristic impedance. The ADL8105-EVALZ is populated
with components suitable for use over the entire −40°C to +85°C operating
temperature range of the ADL8105. To calibrate board trace losses, a through
calibration path is provided between the J1 and J2 connectors. J1 and J2 must
be populated with RF connectors to use the through calibration path. Refer to
Table 1 and Figure 3 for the through calibration path performance.
Access the ADL8105-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 (see Figure 5
for the test point locations).
The RF traces on the ADL8105-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 paddle to provide adequate electrical
conduction and thermal conduction to the heat sink.
The power supply decoupling capacitors on the ADL8105-EVALZ represent the
configuration used to characterize and qualify the device.
For full details on the ADL8105, see the ADL8105 data sheet, which must be
consulted in conjunction with this user guide when using the ADL8105-EVALZ.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND
CONDITIONS.
EVALUATION BOARD PHOTOGRAPHS
REVISION
HISTORY
7/2022—Revision 0: Initial Version
OPERATING THE ADL8105-EVALZ
A 5 V, 300 mA power supply is required to provide the bias to the ADL8105 when
using the ADL8105-EVALZ. Connect the 5 V power supply to the SMT test points,
VDD and VBIAS. Connect the ground reference to the GND test point.
Refer to the ADL8105 data sheet for the recommended resistor values to achieve
different supply currents. The default value of the external resistor, R2,
connected on the ADL8105-EVALZ is 392 Ω, which is the same value used to
characterize the ADL8105.
The following bias conditions are recommended to achieve the performance
specified in the ADL8105 data sheet: supply voltage (V DD ) = 5 V, quiescent
current (I ) = 90 mA, and bias resistance (R BIAS DQ ) = 392 Ω.
RECOMMENDED BIAS SEQUENCING
During Power-Up
To power up the ADL8105-EVALZ, follow this bias sequence:
- Connect the VDD power supply.
- Set the VDD supply to 5 V.
- Apply the RF input signal.
Table 1. Insertion Loss of the Through Calibration Path
During Power-Down
To power down the ADL8105-EVALZ, follow this bias sequence:
- Turn off the RF input signal.
- Set the VDD supply to 0 V.
Frequency (GHz)| Insertion Loss (dB)| Input Return Loss (dB)|
Output Return Loss (dB)
---|---|---|---
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22| −0.1 −0.1 −0.1 −0.1 −0.1
−0.1 −0.2 −0.2 −0.2 −0.3 −0.3 −0.4 −0.4 −0.4 −0.4 −0.5 −0.6 −0.6 −0.6| −26.5
−29.8 −31.9 −40.4 −35.7 −32.3 −38.4 −33.3 −26.5 −25.6 −23.0 −18.6 −17.6 −21.8
−29.8 −16.3 −13.3 −13.8 −18.9| −25.9 −30.9 −34.5 −44.6 −35.2 −31.0
−34.1 −35.6 −26.1
−24.3 −22.0 −18.9
−18.1 −22.0 −26.4
−16.3 −13.4 −13.9
−18.7
EVALUATION BOARD SCHEMATIC AND ARTWORK
ORDERING INFORMATION
BILL OF MATERIALS
Table 2.
Reference Designator| Description| Manufacturer| Part
Number
---|---|---|---
C1 C2 C3 C4 C5 RFIN, RFOUT VDD, GND, VBIAS J1, J2 R2 U1| 0.01 μF capacitor,
0402, do not install (DNI) 100 pF capacitor, 0402 (DNI) 100 pF ceramic
capacitor, 50 V, 5%, C0G, 0402 0.01 μF ceramic capacitor, 25 V, 10%, X8R, 0402
1 μF capacitor, 0402 (DNI) Connectors, 2.9 mm, jack edge Connectors, SMT test
points Connectors, 2.9 mm, jack edge, not installed (NI) 392 Ω resistor,
surface-mount device (SMD), 1%, 1/10 W, 0402 Gallium arsenide (GaAs),
pseudomorphic high electron mobility transistor (pHEMT), monolithic microwave
integrated circuit (MMIC), 5
GHz to 20 GHz| Not applicable Not applicable TDK Corporation TDK Corporation
Not applicable SRI Connector Gage Co. Keystone Electronics SRI Connector Gage
Co. Panasonic
Analog Devices, Inc.| Not applicable
Not applicable
C1005NP01H101J050BA
C1005X8R1E103K
Not applicable
25-146-1000-92 5016
25-146-1000-92
ERJ-2RKF3920XADL8105
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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