Texas Instruments THS3001 User Manual
Page 12
Using The THS3001 EVM
1-6
General Information
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-
Ω
nominal impedance cables. An oscilloscope is typically
used to view and analyze the EVM output signal.
1.4.1
Steps 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-
Ω
nominal 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.
1.4.2
Steps 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-
Ω
nominal 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-
Ω
resistor to ground.
With a 50-
Ω
source impedance, the voltage seen by the THS3001 amplifier
IC on the module will be
½
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-
Ω
input impedance will
be
½
the actual THS3001 amplifier IC output voltage. This is due to the voltage
division between the output resistor (R2) and the oscilloscope input
impedance.