INA250EVM Hardware
2.2
Features
The INA250EVM provides basic functional evaluation of this device. The fixture layout is not intended for
electromagnetic compatibility (EMC) testing.
The INA250EVM PCB is designed to provide the following features:
•
Ease of access to device pins with test points
•
Multiple signal connection options
•
Board layout and construction to support 15-A current through the device across the full –40°C to
+125°C temperature range (see
•
Unpopulated component pads for optional input filtering with differential filter capacitor option included
Refer to the
for comprehensive information about this family of current sense
amplifiers.
2.3
Quick-Start Setup and Use
Follow these procedures to setup and use the INA250EVM:
1. Connect an external dc supply voltage between 2.7 V and 36 V to the VS screw terminal or test point,
and connect the ground reference of that supply to the GND screw terminal or test point.
2. Connect an external dc supply voltage between 0 V and 18 V (referenced to the ground of the INA250)
to the REF screw terminal or test point.
3. Connect a current source across the J1 and J2 banana jacks or across the IN+ and IN– test points to
provide current flowing through the integrated 2-m
Ω
shunt resistor. The common-mode voltage on the
IN+ and IN– pins must be between –0.1 V and +36 V (referenced to the GND pin).
2.4
Current Input
The current flowing across the IN+ and IN– pins develops a differential voltage across the 2-m
Ω
shunt and
is amplified by the current shunt amplifier. The current flowing across this integrated shunt is multiplied by
the current gain of the INA250A2 (500 mV/A). Note that this resistor is not intended to be used as a stand-
alone component. See the
Integrated Shunt Resistor
section of the INA250 data sheet (
) for
more information.
5
SBOU153 – May 2015
INA250EVM User's Guide
Copyright © 2015, Texas Instruments Incorporated
