Texas Instruments manual Using The THS3001 EVM, Steps for THS3001 EVM

Using The THS3001 EVM

1.4 Using The THS3001 EVM

The THS3001 EVM operates from power-supply voltages ranging from ± 5 V to ± 15 V. As shipped, the inverting input gain of the module is set to 1, the noninverting input gain is set to 2, and signal inputs on the module are terminated for 50-Ωnominal impedance cables. An oscilloscope is typically used to view and analyze the EVM output signal.

1.4.1Steps for THS3001 EVM

1)Ensure that all power supplies are set to OFF before making power supply connections to the THS3001 EVM.

2)Select the operating voltage for the EVM and connect appropriate split power supplies to the pads on the module marked ±VCC and +VCC.

3)Connect the power supply ground to the module pad marked GND.

4)Connect an oscilloscope to the module SMA output connector (J2) through a 50-Ωnominal impedance cable (an oscilloscope having a 50-Ω

input termination is preferred for examining very high frequency signals).

5)Set the power supply to ON.

6)Connect the signal input to either the noninverting input (J1) for a gain of 2, or to the inverting input (J3) for a gain of 1.

1.4.2Steps for THS3001 Rev. A EVM

1)Ensure that all power supplies are set to OFF before making power supply connections to the THS3001 EVM.

2)Select the operating voltage for the EVM and connect appropriate split power supplies to J1 terminals on the module marked ±VCC and +VCC.

3)Connect the power supply ground to J1 terminal marked GND.

4)Connect an oscilloscope to the module SMA output connector (J4) through a 50-Ωnominal impedance cable (an oscilloscope having a 50-Ω

input termination is preferred for examining very high frequency signals).

5)Set the power supply to ON.

6)Connect the signal input to either the noninverting input (J3) for a gain of 2, or to the inverting input (J2) for a gain of 1.

Note that each input connector is terminated with a 50-Ωresistor to ground. With a 50-Ωsource impedance, the voltage seen by the THS3001 amplifier IC on the module will be ￿ the source signal voltage applied to the EVM.

7) Verify the output signal on the oscilloscope.

Note: The signal shown on an oscilloscope with a 50-Ωinput impedance will be ￿the actual THS3001 amplifier IC output voltage. This is due to the voltage division between the output resistor (R2) and the oscilloscope input impedance.

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