Texas Instruments THS4271EVM User Manual Download

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Default Configuration

3-2

Changing R6 to 49.9

Ω

allows the EVM to connect to a 50-

Ω

load. This

amplifier is designed to attain optimum performance driving 500-

Ω

loads, but

100-

Ω

loads can be driven. See the data sheet for device characteristics.

Figure 3-2. Noninverting Gain Stage

Vout

Vin+

Vs+

Vs-

49.9

Note:

Power supply decoupling not shown.

Summary of Contents for THS4271EVM

Page 1: ...uide SLOU147 DEVICE THS4271 THS4271 THS4275 EVM TITLE USER S GUIDE DESCRIPTION SHUTDOWN THS4271EVM UG THS4271EVM THS4275EVM THS4271 Unity Gain EVM THS4271 75EVM THS4271 75EVM Noninverting unity gain configuration only Configurable for gains 2 1 Configurable for gains 2 1 No No Yes ...

Page 2: ...nt that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or end...

Page 3: ... handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR A...

Page 4: ...d or possible permanent damage to the EVM Please consult the EVM User s 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 some circuit components may have case temperatures greater than 60 C The EVM is designed to operate properly with certain components above 60 C as long as th...

Page 5: ...is provided for your protection Please read each caution and warning carefully FCC Warning This equipment is intended for use in a laboratory test environment only It gen erates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules which are designed to provide reasonable protection agai...

Page 6: ...f publication of this manual Texas Instruments applications apologizes if they change over time THS4271 THS4275 data sheet SLOS397 Application report SLMA002 PowerPAD Thermally Enhanced Package http www s ti com sc psheets slma004 slma002 pdf Application report SLMA004 PowerPAD Made Easy http www s ti com sc psheets slma004 slma004 pdf Application report SSYA008 Electrostatic Discharge ESD http ww...

Page 7: ...lications 3 1 3 1 Default Configuration 3 1 4 EVM Hardware Description 4 1 Figures 1 1 Schematic of the THS4271EVM UG Unity Gain 1 2 2 1 Test Equipment Connections 2 1 3 1 Default Configuration 3 1 3 2 Noninverting Gain Stage 3 2 4 1 Board Layout Views 4 2 Tables 4 1 THS4271EVM UG Unity Gain Bill of Materials 4 1 ...

Page 8: ...o minimize peaking in the unity gain configuration Each pad and trace on a PCB has an inductance associated with it when in conjunction with the inductance associated with the package may cause peaking in the frequency response hence cause the device to be come unstable Minimizing the inductance in the feedback path is critical for reducing the peak ing of the frequency response in unity gain The ...

Page 9: ...rding to the application requirement 50 Ω impedance traces on Vin and the Vin to Vout connection see Figure 4 1 the vias provide the impedance Convenient GND test point TP1 453 Ω series matching resistor R6 produces a 500 Ω load in combination with resistor R7 500 Ω is the standard data sheet load impedance Power supply ripple rejection capacitors C1 and C2 Decoupling capacitors C3 C4 C5 C6 Power ...

Page 10: ...shows how to connect power supplies signal source and monitor ing instrument It is recommended that the user connect the EVM as shown to avoid damage to the EVM or the op amp installed on the board Figure 2 1 Test Equipment Connections Chapter 2 ...

Page 11: ...ut provides a 500 Ω load to the output of the EVM to provide optimum performance per the data sheet The load is implemented as a 453 Ω resistor R6 in series with the output to J4 Vout and a 49 9 Ω output load resistor R7 from J4 to ground The gain measured from J2 to the ouput of the amplifier pin 6 is 1 However the interaction between R6 and R7 causes the output at J4 to be attenuated by 10 1 Whe...

Page 12: ... Ω load This amplifier is designed to attain optimum performance driving 500 Ω loads but 100 Ω loads can be driven See the data sheet for device characteristics Figure 3 2 Noninverting Gain Stage J4 Vout R4 J2 Vin Vs Vs U1 2 3 6 7 4 R6 0 49 9 W Note Power supply decoupling not shown ...

Page 13: ...ME 4 Capacitor 0 1 µF ceramic X7R 50 V 0805 C3 C6 2 AVX 08055C104KAT2A Garrett 08055C104KAT2A 5 Resistor 49 9 Ω 1 8 W 1 0805 R7 1 PHYCOMP 9C08052A49R9FKHFT Garrett 9C08052A49R9FKHFT 6 Resistor 453 Ω 1 8 W 1 0805 R6 1 PHYCOMP 9C08052A4530FKHFT Garrett 9C08052A4530FKHFT 7 Resistor 49 9 Ω 1 4 W 1 1206 R4 1 PHYCOMP 9C12063A49R9FKRFT Garrett 9C12063A49R9FKRFT 8 Test point black TP1 1 Keystone 5001 Alli...

Page 14: ...4 2 Figure 4 1 Board Layout Views Top Layer 3 Power Layer 2 Ground Bottom ...

Page 15: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments THS4271EVM UG ...

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