Texas ths6022, User Manual

Using The THS6022 EVM

1-6

General Information

1.5

Using The THS6022 EVM

The THS6022 EVM operates from a split power supply with voltages ranging
from 

±

5 V to 

±

15 V. The use of a single supply for this EVM is not

recommended. As shipped, the output of driver 1 is equal to a noninverting
gain of 2 when using the single-ended input mode. The output of driver 2 is
equal to an inverting gain of 2 under the same conditions. An oscilloscope is
typically used to view and analyze the EVM output signals.

1) Ensure that all power supplies are set to 

OFF  before making power supply

connections to the THS6022 EVM.

2) Select the operating voltage for the EVM and connect appropriate split

power supplies to the banana jacks on the module marked 

+V

CC

 (J1) and

–V

CC

 (J3).

3) Connect the power supply ground to the module banana jack marked

GND (J2).

4) Connect an oscilloscope to U2, pin2. This is the driver 1 amplifier output.

Connecting directly to the DRIVER 1 OUTPUT BNC connector (J5) with
a 50-

Ω

 nominal impedance cable and an oscilloscope having a 50-

Ω

 input

termination is preferred for examining very high frequency
signals.

5) Set jumper J1 to the 1–2 position.

6) Set jumper J2 to the 1–2 position.

7) Set the power supply to 

ON

8) Connect a signal input to the DRIVER 1 INPUT BNC (J4).

Each input connector on this EVM is terminated with a 50-

Ω

 resistor to ground.

With a 50-

Ω

 source impedance, the voltage seen by the THS6022 amplifier

IC on the EVM will be 1/2 the source signal voltage applied to the EVM input
connector.

9) Verify the output signal on the oscilloscope. With a high-impedance scope

probe, the output signal should be twice the source amplitude. Using the
50-

Ω

 input impedance of an oscilloscope will show 1/2 the actual

THS6022 amplifier IC output voltage. This is due to the voltage division
between the source resistance and the oscilloscope 50-

Ω

 input

impedance. When connected to J7 (Driver 2 output), the signal should be
180

°

 phase shifted from the Driver 1 output (J5).