Introduction
2
SLOU483 – August 2017
Copyright © 2017, Texas Instruments Incorporated
THS3491RGT Evaluation Module
1
Introduction
The Texas Instruments THS3491RGT evaluation module (EVM) helps designers evaluate the
performance of the THS3491 high-speed, high-voltage, and low-distortion current feedback amplifier in a
16-pin RGT package. This document details the THS3491RGT EVM and should be a good starting point
for high-speed PCB design involving the THS3491RGT device. The document includes a brief description
of the module and a list of EVM features, followed by EVM specifications and default EVM configuration,
details on connecting and using the EVM, and a discussion of high-speed amplifier PCB design
considerations.
1.1
Description
The THS3491RGT evaluation module (EVM) is used to evaluate the THS3491 device, which is a high-
speed, high-voltage and low-distortion current-feedback amplifier in a 16-pin RGT package. The EVM is
designed to quickly and easily demonstrate the functionality and performance of THS3491 in a gain of 5 V
/ V, driving an equivalent R
LOAD
= 100
Ω
. The EVM is ready to connect to power supplies, signal source,
and test instruments through the use of onboard connectors. The board is set up for single-ended input
and output operation for interfacing with 50-
Ω
test equipment. By default, the THS3491EVM comes with a
heat-sink attached on the bottom of the board directly underneath the device that helps in the overall
device thermal dissipation for high-output voltage swings.
1.2
Evaluation Module Features
The THS3491 high-speed operational amplifier EVM features include:
•
Configured for split-supply operation and easily modified for single supply
•
Designed for single-ended 50-
Ω
input and output connection
•
Configured for non-inverting gain of 5 V / V configuration and easily modified for inverting gain
configuration
•
Simple interface to the inputs and outputs through the SMA connectors
•
Heat-sink on the bottom of the board to help with the overall device thermal dissipation for high-output
voltage swings
1.3
THS3491 Operating Conditions
Supply voltage range, ±V
CC
= ±7 to ±16 Vdc (see the device data sheet for min and max values).
Supply current, I
Q
= 17.4 mA (see the device data sheet for min and max values).
For complete THS3491 amplifier IC specifications, parameter measurement information, and additional
application information, see the THS3491 data sheet (
).
