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Texas Instruments THS3491RGT EVM, User Manual, Page: 4 / 19

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Texas Instruments THS3491RGT EVM User Manual Download Page 4

287

Q

 

J3

240

Q

 

240

Q

 

287

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54.9

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THS3491RGT OUT

50 

Q

 Term 

Measuring Instrument

EVM Default Configuration

www.ti.com

4

SLOU483 – August 2017

Submit Documentation Feedback

Copyright © 2017, Texas Instruments Incorporated

THS3491RGT Evaluation Module

Remember, the output resistor network is only present to protect the measuring instrument from being
over-driven by the device output for high-output signal swings. Desoldering the output matching resistor
and replacing it with a single 50-

Ω

series output resistor that gives only 6-dB output voltage loss at the

measuring instrument is easily done.

Figure 2. Output Interface to the Measuring Instrument

(2)

Summary of Contents for THS3491RGT EVM

Page 1: ...r PCB design should be approached with care and special attention must be provided to the board parasitic which impacts the overall system performance Contents 1 Introduction 2 2 EVM Default Configura...

Page 2: ...The EVM is ready to connect to power supplies signal source and test instruments through the use of onboard connectors The board is set up for single ended input and output operation for interfacing...

Page 3: ...up Block Diagram 2 1 Standard Non Inverting Gain Configuration The THS3491RGT EVM default configuration is a single ended input single ended output non inverting gain of 5 from SMA input J2 to the THS...

Page 4: ...Evaluation Module Remember the output resistor network is only present to protect the measuring instrument from being over driven by the device output for high output signal swings Desoldering the ou...

Page 5: ...g the power supply cables to the EVM set the dual dc output power supply to 15 V Make sure the dc power supply is turned off before proceeding to the next step Connect the 15 V power supply to the Vs...

Page 6: ...ally important for the inverting input pin A capacitance as low as 1 pF at the inverting input can significantly affect the response of the amplifier or even cause oscillation In general it is best to...

Page 7: ...7109DG Aavid Surface mount heat sink for D2PAK Surface mount heat sink for D2PAK 10 J1 J2 J3 3 142 0701 851 Emerson Network Power Connector End launch SMA 50 ohm SMT SMA End Launch 11 J4 1 SPC15363 Te...

Page 8: ...tor Qty Value Part Number Manufacturer Description Package Reference 25 U1 1 THS3491IRGT Texas Instruments High Voltage Low Distortion Current Feedback Amplifier RGT0016A RGT0016A 26 C9 0 100pF C0603C...

Page 9: ...tion 9 SLOU483 August 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated THS3491RGT Evaluation Module 5 2 Schematic Figure 3 illustrates the EVM schematic Figure 3 Full S...

Page 10: ...17 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated THS3491RGT Evaluation Module 5 3 Circuit Board Layout Figure 4 through Figure 11 illustrate the EVM PCB layout Figure 4 T...

Page 11: ...com EVM Hardware Description 11 SLOU483 August 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated THS3491RGT Evaluation Module Figure 6 Layer 3 GND Figure 7 Layer 4 GND...

Page 12: ...Hardware Description www ti com 12 SLOU483 August 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated THS3491RGT Evaluation Module Figure 8 Layer 5 GND Figure 9 Layer 6 G...

Page 13: ...dware Description 13 SLOU483 August 2017 Submit Documentation Feedback Copyright 2017 Texas Instruments Incorporated THS3491RGT Evaluation Module Figure 10 Layer 7 GND Figure 11 Bottom Components and...

Page 14: ...set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that...

Page 15: ...the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain great...

Page 16: ...t the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the...

Page 17: ...OST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF...

Page 18: ...TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD...

Page 19: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments THS3491RGTEVM...

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