Texas Instruments THS4503 User Manual Download

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5-4

Figure 5−3. Schematic Diagram

C2 0

VCC+

C4 *

R17

340

Ω

392

Ω

R13
*

C10

402

Ω

−

Vocm

THS4503

+VS

ADP4

−1WT

374

Ω

TP1

Vocm

+VS

−VS

Vin+

R12

Vin−

C12

0.1

TP4

TP5

R11

R16
*

392

Ω

Vout

−VS

C3*

R14

R15

6.8

C1 0

Vout+

+VS

Vout−

R7 0

TP2

PD−

−VS

VCC+

56.2

Ω

GND

C13

340

Ω

R10

280

Ω

TP3

0.1

C11

6.8

C14
*

R6 0

Note:

Devices designated with an

are not installed on the EVM. The user must supply these components.

Summary of Contents for THS4503

Page 1: ...THS4503EVM June 2002 HPL User s Guide SLOU132...

Page 2: ...t 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 wh...

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 r...

Page 4: ...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 50 C The EVM is desig...

Page 5: ...the THS4503EVM to determine the design techniques used in the evaluation board It is recommended that the user review the application note Fully Differential Amplifiers literature number SLOA054 to le...

Page 6: ...e required to take whatever measures may be required to correct this interference Electrostatic Sensitive Components This EVM contains components that can potentially be damaged by electrostatic disch...

Page 7: ...heets slma004 slma002 pdf Application report literature number SLMA004 Power Pad Made Easy http www s ti com sc psheets slma004 slma004 pdf Application report literature number SSYA008 Electrostatic D...

Page 8: ...vi...

Page 9: ...3 2 Using the THS4503EVM 2 1 2 1 Required Equipment 2 2 2 2 Power Supply Connection 2 2 2 3 Function Generator Setup 2 3 2 4 Signal Connection VIN 2 3 3 THS4503EVM Applications 3 1 3 1 Single Ended I...

Page 10: ...2 2 2 Signal Connections 2 3 3 1 Single Ended In Single Ended Out Utilizing Transformer 3 2 3 2 Sinlge Supply Operation 3 3 3 3 Output of an AC Coupled Single Supply Application 3 4 5 1 Top Layer 1 S...

Page 11: ...c diagrams EVM specifications details on connecting and using the EVM and a discussion of high speed amplifier design considerations This EVM enables the user to implement various circuits to clarify...

Page 12: ...termination R1 R2 Termination can be configured according to the application requirement VOCM direct input through TP1 Output transformer T1 Footprints for antialiasing filter implementation using lo...

Page 13: ...hematic diagram showing all component locations The default configuration assumes a 50 signal source and contains a termination resistor R1 for the source Some components such as C8 C9 C11 C12 TP1 TP2...

Page 14: ...1 4...

Page 15: ...pment It is recommended that the user connect the EVM as described in this section to avoid damage to the EVM or the THS4503 installed on the board Topic Page 2 1 Required Equipment 2 2 2 2 Power Supp...

Page 16: ...Set the dual dc power supply to 5 V If available set the current limit on the dc power supply to 100 mA 2 Make sure the dual dc power supply is turned off before proceeding to the next step 3 Connect...

Page 17: ...to generate a 1 MHz 0 5 V 1 VPP sine wave with no dc offset 4 Verify that the output is 1 MHz 0 5 V 1 VPP 5 Disable the function generator output before proceeding to the next step 6 Disconnect the ca...

Page 18: ...2 4...

Page 19: ...t many other circuits can be constructed The user is encouraged to experiment with different circuits exploring new and creative design techniques After all that is the function of an evaluation board...

Page 20: ...one of two conditions is met R11 is installed and the measuring instrument is set to 1 M input impedance or R11 is not installed and the measuring instrument has an input impedance of 50 Figure 3 1 S...

Page 21: ...ccomplished The designer should note that the ground connection of the schematic at C2 through R17 is a second input to avoid confusion about whether a coupling capacitor is actually needed In fact th...

Page 22: ...ese circuits Engineer design utilities are available on the Am plifiers and Comparators section of the Analog and Mixed Signal portion of the TI web page Designers should be aware that each individual...

Page 23: ...The GND side of these capacitors should be located close to each other minimizing the differential current loops associated with differential output currents If poor high frequency performance is obs...

Page 24: ...ng on PCB construction The requirements for thermal lands and thermal vias are detailed in http www s ti com sc techlit slma002 and http www s ti com sc techlit slma004 Finally all inputs and outputs...

Page 25: ...0JLHFT 7 Resistor 280 1 8 W 1 0805 R10 1 Phycomp 9C08052A2800FKHFT Garrett 9C08052A2800FKHFT 8 Resistor 340 1 8 W 1 0805 R8 R9 2 Phycomp 9C08052A3400FKHFT Garrett 9C08052A3400FKHFT 9 Resistor 374 1 8...

Page 26: ...le J5 J7 J8 3 HH Smith 101 Newark 35F865 18 Connector SMA PCB Jack J1 J2 J3 J4 J6 5 Amphenol 901 144 8RFX Newark 01F2208 19 Standoff 4 40 Hex 0 625 Length 4 Keystone 1804 Allied 839 2089 20 Screw Phil...

Page 27: ...5 3 EVM Hardware Description Figure 5 2 Bottom Layer 2 Ground and Signal...

Page 28: ...4 3 R2 374 TP1 Vocm VS VS J6 Vin R12 J1 Vin C12 0 1 F TP4 C5 TP5 R11 R16 R4 392 J4 Vout VS C3 R14 R15 C7 C8 6 8 F C1 0 J2 Vout VS J3 Vout R7 0 C6 TP2 PD J5 VS VCC R1 56 2 J7 GND C13 1 F R9 340 R10 28...

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