Power Connections

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3

Power Connections

The THS4531DGKEVM is equipped with banana jacks for easy connection of power. The positive supply

input is labeled V

3.1

Split-Supply Operation

To operate as split supply, apply the positive supply voltage to V

the ground reference from supply to GND.

3.2

Single-Supply Operation

To operate as single supply, connect jumper V

Inputs and outputs must be biased per data-sheet specifications for proper operation.

4

Input and Output Connections

The THS4531DGKEVM is equipped with SMA connectors for easy connection of signal generators and

analysis equipment. As shipped, the EVM is configured for a gain of 1, split supply, single-ended input and

output with 50-

Ω termination. For best results, signals must be routed to and from the EVM with cables

having 50-

Ω characteristic impedance. V

(J10) is the output connector for single-ended output signals. V

single-ended input signals and has C1 and R6 added to approximate the impedance of an ac-coupled

50-

Ω source and to balance the amplifier when V

amplifier converts the single-ended input to a differential signal at its output pins. A resistor network (R20,

R21, R24) and transformer on the amplifier's output convert the differential signal to single-ended,

provides 2-k

Ω load to the amplifier when terminated in 50 Ω, and 50-Ω line impedance match at V

This results in loss, and the overall gain is approximately

–38 dB. See the following THS4531 data-sheet

applications section, schematics, and layouts for more detail and how to reconfigure the EVM.

2

THS4531DGKEVM Evaluation Module

SLOU334

– January 2012

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© 2012, Texas Instruments Incorporated