ANALOG DEVICES ADL8122 Evaluation Board User Guide

ANALOG DEVICES ADL8122 Evaluation Board

FEATURES

• 4-layer, Rogers 4350B and Isola 370HR evaluation board
• End launch, SMA RF connectors
• Through calibration path (depopulated connectors)

EVALUATION KIT CONTENTS

• ADL8122-EVALZ 10 MHz to 10 GHz evaluation board or ADL8122-EVAL1Z 10 kHz to 10 GHz evaluation board

EQUIPMENT NEEDED

• RF signal generator
• RF spectrum analyzer
• RF network analyzer
• 5 V, 200 mA power supply

GENERAL DESCRIPTION

The ADL8122-EVALZ and ADL8122-EVAL1Z are 4-layer printed circuit boards (PCBs) fabricated from 0.254 mm (10 mils) thick, Rogers 4350B and Isola 370HR, copper clad, forming a nominal thickness of 1.63 mm (64 mils). The ADL8122-EVALZ was designed to support operation from 10 MHz to 10 GHz, while the ADL8122-EVAL1Z was designed to extend frequency operation down to 10 kHz. The ADL8122-EVAL1Z still operates up to 10 GHz. The RFIN and RFOUT ports on the ADL8122-EVALZ and ADL8122-EVAL1Z are populated with Subminiature A (SMA), female coaxial connectors. The ADL8122-EVALZ and ADL8122-EVAL1Z are populated with components suitable for use over the entire −55°C to +125°C operating temperature range. To calibrate out board trace losses, a thorough 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 Figure 11 and Table 1 for the thorough calibration path performance for both the ADL8122-EVALZ and ADL8122-EVAL1Z.

Access the ADL8122-EVALZ and ADL8122-EVAL1Z ground and drain voltage through the surface-mount technology (SMT) test point connectors, GND, and VDD. A supplementary test point for VRBIAS is included for simple access on the RBIAS pin (see Figure 12 and Figure 14 for the test point locations). The RF traces on the ADL8122-EVALZ and ADL8122-EVAL1Z are 50 Ω, grounded, coplanar waveguide. The package ground leads and the exposed pad connects directly to the ground plane. Multiple vias connect the top and bottom ground planes with a 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 ADL8122-EVALZ and ADL8122-EVAL1Z represent the configuration used to characterize and qualify the device. For full details on the ADL8122, see the ADL8122 data sheet, which must be consulted in conjunction with this user guide when using the ADL8122-EVALZ and ADL8122-EVAL1Z.

EVALUATION BOARD PHOTOGRAPHS

EVALUATION BOARD HARDWARE

OPERATING THE ADL8122-EVALZ AND ADL8122-EVAL1Z
A 5 V, 200 mA power supply is required to provide the bias to the ADL8122. Connect the 5 V power supply to the SMT test point, VDD. Connect the ground reference to the GND test point. Refer to the ADL8122 data sheet for the recommended resistor values to achieve different supply currents. The default value of the bias resistor, R2, connected on both the ADL8122-EVALZ and ADL8122-EVAL1Z is 620 Ω, which is the same value used to characterize the ADL8122. The following bias conditions are recommended to achieve the performance specified in the ADL8122 data sheet: supply current (VDD) = 5 V, quiescent current (IDQ) = 95 mA, and bias resistance (RBIAS) = 620 Ω.

RECOMMENDED BIAS SEQUENCING FOR THE ADL8122-EVALZ AND ADL8122-EVAL1Z
To power up both the ADL8122-EVALZ and ADL8122-EVAL1Z, follow the recommended power-up sequence:

1. Connect the VDD power supply.
2. Set the VDD supply to 5 V.
3. Apply the RF signal.

To power down both the ADL8122-EVALZ and ADL8122-EVAL1Z, follow the recommended power-down sequence:

1. Turn off the RF signal.
2. Set the VDD supply to 0 V.

PERFORMANCE COMPARISON OF THE ADL8122-EVALZ AND ADL8122-EVAL1Z
Figure 7 and Figure 8 show the gain, input return loss (S11), and output return loss (S22) for the ADL8122-EVALZ and ADL8122-EVAL1Z at frequencies up to 200 MHz. For the ADL8122-EVALZ, the gain and return loss rolls off at around 4 MHz. This roll-off is caused by the biasing network. On the ADL8122-EVAL1Z, the low frequency response has been extended by incorporating additional biasing components. Figure 9 and Figure 10 show the gain, input return loss, and output return loss for the ADL8122-EVALZ and ADL8122-EVAL1Z up to 10 GHz. The gain and return loss performance of the ADL8122-EVALZ and ADL8122-EVAL1Z are similar, and both hold up well to 10 GHz.

THROUGH CALIBRATION PATH
The ADL8122-EVALZ and ADL8122-EVAL1Z include a calibration path (see Figure 11 and Table 1). THRUCAL (J1 and J2) must be populated with RF connectors to use the through calibration path. For both the ADL8122-EVALZ and ADL8122-EVAL1Z, the through calibration paths includes two AC coupling capacitors (populated) to mimic the AC coupling capacitors in the main signal path.

Figure 11. Insertion Loss (S21) and Return Loss (Input and Output) of the Through Calibration Path (ADL8122-EVALZ and ADL8122-EVAL1Z)

Table 1. Insertion Loss of the Through Calibration Path (ADL8122-EVALZ and ADL8122-EVAL1Z

Frequency (GHz)                                         Insertion Loss

(dB)

EVALUATION BOARD SCHEMATICS AND ARTWORK

EVALUATION BOARD SCHEMATICS AND ARTWORK

ORDERING INFORMATION

• analog.com Rev. 0 | 10 of 11

BILL OF MATERIALS

Table 2. ADL8122-EVALZ Bill of Materials

Reference Designator                    Description

Manufacturer                         Manufacturer Number

C1, C2| Ceramic capacitors, 0.1 μF, 16 V, 20% to 25%, 0402| American Technical Ceramics| 560L104YTRN
---|---|---|---
C3| Ceramic capacitor, 100 pF, 25 V, 10%, C0G, 0402| AVX Corporation| 04023A101KAT2A
C4| Ceramic capacitor, 10 pF, 50 V, 5%, C0G, 0402| Murata| GCM1555C1H100JA16D
C5| Ceramic capacitor, 0.1 μF, 50 V, 10%, X7R, 0402| TDK| C1005X7R1H104K050BE
L1, L2, L3, L4| Inductors, ferrite bead, 2.2 kΩ, 25%, 100 MHz, 0.15 A, 2.2 Ω, 0402| TDK| MMZ1005A222ET000
R1| Resistor SMD, 0 Ω jumper, 1/16 W, 0402| Yageo| RC0402JR-070RL
R2| Resistor SMD, 620 Ω, 5%, 1/10 W, 0402| Panasonic| ERJ-2GEJ621X
C6, C7| Ceramic capacitors, 0.1 μF, 16 V, 20% to 25%, 0402 (do not install, DNI)| American Technical Ceramics| 560L104YTRN
VRBIAS, GND, VDD| SMT test points| Keystone Electronics| 5016
RFIN, RFOUT| Connectors, K jack edge| SRI Connector Gage Co.| 25-146-1000-92
J1, J2| Connectors, K jack edge (unpopulated)| SRI Connector Gage Co.| 25-146-1000-92
U1| 10 kHz to 10 GHz, wideband, low noise amplifier| Analog Devices, Inc.| ADL8122ACPZN

Table 3. ADL8122-EVAL1Z Bill of Materials

Reference Designator Description Manufacturer                         Manufacturer Number

C1, C2| Ceramic capacitors, 0.1 μF, 16 V, 20% to 25%, 0402| American Technical Ceramics| 560L104YTRN
---|---|---|---
C3| Ceramic capacitor, 100 pF, 25 V, 10%, C0G, 0402| AVX Corporation| 04023A101KAT2A
C5| Ceramic capacitor, 1 μF, 10 V, 10%, X7S, 0402| TDK| C1005X7S1A105K050BC
L1, L2, L3, L4| Inductors, ferrite bead, 2.2 kΩ, 25%, 100 MHz, 0.15 A, 2.2 Ω, 0402| TDK| MMZ1005A222ET000
L5, L6| Inductors, power shielded, 680 μH, 10%, 100 kHz, 1.17 A, 0.596 Ω,| Coilcraft, Inc.| MSS1210H-684KED
| DCR| |
R2, R3| Resistor SMD, 300 Ω, 5%, 1/10 W, 0402| Panasonic| ERJ-2GEJ301X
R4| Resistor SMD, 620 Ω, 0.1%, 1/16 W, 0402| Panasonic| ERA-2AEB621X
C4| Ceramic capacitor, 100 pF, 25 V, 10%, C0G, 0402 (do not install,| AVX Corporation| 04023A101KAT2A
| DNI)| |
C6, C7| Ceramic capacitors, 0.1 μF, 16 V, 20% to 25%, 0402 (DNI)| American Technical Ceramics| 560L104YTRN
R1| Resistors, SMD, 0 Ω jumper, 1/16 W, 0402 (DNI)| Yageo| RC0402JR-070RL
R5| Resistors, SMD, 0 Ω jumper, 1/10 W, 0402 (DNI)| Panasonic| ERJ-2GE0R00X
VRBIAS, GND, VDD| SMT test points| Keystone Electronics| 5016
RFIN, RFOUT| Connectors, K jack edge| SRI Connector Gage Co.| 25-146-1000-92
J1, J2| Connectors, K jack edge (unpopulated)| SRI Connector Gage Co.| 25-146-1000-92
U1| 10 kHz to 10 GHz, wideband, low noise amplifier| Analog Devices, Inc.| ADL8122ACPZN

ORDERING INFORMATION

NOTES

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 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. 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 under 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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