Texas Instruments LMH9226RRL-EVM Скачать руководство пользователя страница 8 | Manualshive

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Texas Instruments LMH9226RRL-EVM Скачать руководство пользователя страница 8

(J3)

LMH9226

(J2)

LMH9226 RRL EVM

(J4)

Vector Network Analyzer

Zo(diff) = 100

Ÿ

Zo(se) = 50

Ÿ

EVM Overview

8

SBOU237 – December 2019

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

LMH9226 Evaluation Module

2.4

Stack up and Material

The LMH9226 EVM is a 56-mil, 4-layer board whose material type is Isola

®

370HR. The top layer routes

the power, ground, and signals to and from the device. The signal impedance is targeted at 49.9

Ω

. The

bottom 3 layers are ground layers.

Figure 7. LMH9226 EVM Stack-up (Units in Mils)

3

Test Setup Diagrams

This section includes general recommendations for S-parameter, noise figure, and two-tone OIP3 setup
while measuring the LMH9226 EVM.

3.1

S-Parameter Test Setup

Figure 8. S-Parameter Test Setup

Use the following guidelines for S-parameter measurement:

1. S-parameter measurement is typically done using a Vector Network Analyzer (VNA), as

shows. For measuring the LMH9226 EVM, a 4-port VNA is recommended which can generate and
receive truly differential signals at the input and output ports.

2. Before connecting the RF coax cables to the LMH9226 EVM, you must calibrate the VNA along with

the cables using a calibration kit. This accounts for any cable losses in the S-parameter calculation at
the VNA and helps set reference impedance at the cable ends.

3. Make sure the frequency sweep and output power level from the VNA is set within the linear operating

range of the LMH9226 devices. The resolution bandwidth (RBW) and dynamic range of the VNA can
be adjusted to give optimum sweep time for the measurement.

4. It is important to account for onboard trace losses at the input and output pins of the device. De-

embedding of the input and output traces is recommended to improve the S-parameter measurement

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Содержание LMH9226RRL-EVM

Страница 1: ...d Contents 1 Description 2 1 1 Features 2 1 2 General Usage Information 2 2 EVM Overview 4 2 1 Schematic 4 2 2 PCB Layers 5 2 3 LMH9226 EVM Bill of Material 7 2 4 Stack up and Material 8 3 Test Setup Diagrams 8 3 1 S Parameter Test Setup 8 3 2 Noise Figure Test Setup 9 3 3 Two Tone OIP3 Test Setup 10 List of Figures 1 Single Tone Setup for Gain and Output P1dB 2 2 LMH9226 EVM Schematic 4 3 Top Lay...

Страница 2: ...ent The EVM is ready to connect to a 3 3 V power supply signal source and test instruments through the use of onboard connectors 1 1 Features Operates on single 3 3 V supply Designed for single ended 50 Ω input matching and 100 Ω differential output matching interface Simple interface to the inputs and output through onboard SMA connectors Power down option available onboard using jumper connector...

Страница 3: ... the differential output impedance to 100 Ω in the 2 2 GHz to 3 GHz frequency band See Table 1 for the discrete L and C component values used on the LMH9226 EVM f When connecting to a spectrum analyzer single ended input the differential signal out of the EVM should be converted to a single ended signal using a passive balun as shown in Figure 1 g It is recommended to use balun which operates in t...

Страница 4: ...yright 2019 Texas Instruments Incorporated LMH9226 Evaluation Module 2 EVM Overview This section includes the schematic diagram a bill of materials BOM PCB layer prints and EVM stack up information 2 1 Schematic Figure 2 shows the LMH9226 EVM schematic Figure 2 LMH9226 EVM Schematic ...

Страница 5: ...7 December 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMH9226 Evaluation Module 2 2 PCB Layers Figure 3 through Figure 6 illustrate the PCB layers for this EVM Figure 3 Top Layer Figure 4 Layer 2 ...

Страница 6: ...EVM Overview www ti com 6 SBOU237 December 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMH9226 Evaluation Module Figure 5 Layer 3 Figure 6 Bottom Layer ...

Страница 7: ...nixContact_17157 21 Phoenix Contact 1715721 7 J2 J3 J4 3 SMA JACK 50 Ω R A SMT Rosenberger_32K243 40ML5 Rosenberger 32K243 40ML5 8 J5 1 Header 100 mil 3x1 Tin TH CONN_PEC03SAAN Sullins Connector Solutions PEC03SAAN 9 R1 1 2 49 kΩ RES 2 49 k 1 0 063 W AEC Q200 Grade 0 0402 0402 Vishay Dale CRCW04022K49FKED 10 R2 1 3 24 kΩ RES 3 24 k 1 0 063 W AEC Q200 Grade 0 0402 0402 Vishay Dale CRCW04023K24FKED ...

Страница 8: ...or S parameter measurement 1 S parameter measurement is typically done using a Vector Network Analyzer VNA as Figure 8 shows For measuring the LMH9226 EVM a 4 port VNA is recommended which can generate and receive truly differential signals at the input and output ports 2 Before connecting the RF coax cables to the LMH9226 EVM you must calibrate the VNA along with the cables using a calibration ki...

Страница 9: ...Figure 9 and Figure 10 give typical input and output trace losses measured on the LMH9226 EVM respectively Figure 9 Input PCB Trace Loss vs Frequency Figure 10 Output PCB Trace Loss vs Frequency 3 2 Noise Figure Test Setup Figure 11 Noise Figure Test Setup Use the following guidelines for Noise Figure NF measurement 1 The traditional Y factor method can be used for the NF measurement using a Noise...

Страница 10: ...is 8 dBm then set the signal generators such that each of the fundamental output power results in 2 dBm per tone However if each output tone is at 8 dBm instead the amplifier linearity will degrade as a result of higher total composite output power of 14 dBm at the device outputs As a general rule it is recommended to keep the total output power level approximately 6 to 8 dB lower than the 1 dB co...

Страница 11: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Страница 12: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Страница 13: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Страница 14: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Страница 15: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Страница 16: ...se resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for...

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