INA4180-4181EVM Hardware
4
SBOU189 – November 2017
Copyright © 2017, Texas Instruments Incorporated
INA4180-INA4181 Evaluation Module User's Guide
2.1
Features
The layout of the INA4180-4181EVM printed-circuit board (PCB) is designed to provide the following
features:
•
Evaluation of all gain options for the INA4180Ax and INA4181Ax
•
Ease of access to device pins with test points
•
Capability to evaluate high-side and low-side configurations
See the
and
data sheets for comprehensive information about the INA4180 and
INA4181 family of devices.
3
Quick Start Setup and Use
The following are instructions to set up and use the INA4180Ax devices of the INA4180-4181EVM.
Step 1.
Connect an external dc supply voltage between 2.7 V and 5.5 V to the VS test point, and
connect ground reference of that supply to the GND test point.
Step 2.
Connect the input per
The following are instructions to set up and use the INA4181Ax devices of the INA4180-4181EVM.
Step 1.
Connect an external dc supply voltage between 2.7 V and 5.5 V to the VS test point, and
connect ground reference of that supply to the GND test point.
Step 2.
Connect an external supply to the REF1, REF2, REF3 or REF4 test point (depends on which
channel are you using). This reference voltage can be set anywhere from 0 V to VS. Further
details regarding the use of the reference voltage are discussed later in
Step 3.
Connect the input per
3.1
Measurements
The INA4180-4181EVM enables the user to either simulate the voltage developed across a sense resistor
based on a given set of system conditions or to connect remotely to an existing shunt already included in
an example application.
The following procedures are used to configure a measurement evaluation without a shunt.
•
Channel 1:
Step 1.
Connect a differential voltage to the IN+1 and IN–1 test points.
Step 2.
Measure the output voltage at the OUT1 test point.
•
Channel 2:
Step 1.
Connect a differential voltage to the IN+2 and IN–2 test points.
Step 2.
Measure the output voltage at the OUT2 test point.
•
Channel 3:
Step 1.
Connect a differential voltage to the IN+3 and IN–3 test points.
Step 2.
Measure the output voltage at the OUT3 test point.
•
Channel 4:
Step 1.
Connect a differential voltage to the IN+4 and IN–4 test points.
Step 2.
Measure the output voltage at the OUT4 test point.
NOTE:
The output voltage is equal to the gain of the device multiplied by the differential voltage
measured directly at the device input pins.