Hardware; Features; Operation; Warnings - Texas Instruments INA901EVM-CVAL User Manual

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Hardware

The EVM is user configurable so that a wide range of operating conditions and filtering options can be
demonstrated. The board also contains an LM193AJRLQMLV-SP space-grade comparator so that the
EVM can be evaluated as an overcurrent detector. The board can support –15-V to 65-V common-mode
signal on the inputs, and a 10-A load current with a user installed shunt resistor.
3.1

Features

• Flexible input connections, including both onboard and external shunt
• Ease of access to device pins with test points
• Onboard comparator for out-of-box overcurrent detection
• Footprints for optional filtering at the input pins
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Operation

4.1

Warnings

4.1.1 High Voltage
The common-mode voltage rating of the INA901-SP and the INA901EVM-CVAL is –15 V to 65 V. When
using the device and EVM under such circumstances, all proper safety practices must be followed. Do not
apply less than –15 V or more than 65 V.
4.1.2 High Current
An unpopulated footprint is provided for the user to install an onboard shunt resistor. The shunt resistor
traces have a maximum current rating of 10 A. Ensure that the power rating of the resistor is sufficient for
the application.
4.1.3 Board Component Grades
All components on this board are intended for evaluation purposes only and not for flight.
4.2

Quick Start Setup

Follow these procedures to set up and use the INA901EVM-CVAL:
Step 1. Connect the positive lead of an external DC supply voltage to J2 (V+), and connect the
ground reference of that supply to J3 (GND). Set the supply for 5 V. Ensure this supply is
turned off for now.
Step 2. Ensure the shorting plug is populated at J5. Alternatively, a separate pullup voltage can be
applied to the comparator. To do this, depopulate the shorting plug at J5, and apply the
desired voltage to J6 (V_PULLUP).
Step 3. Provide a differential input voltage signal to the IN+ and IN– nodes by connecting the signal
leads to the positive and negative terminals of J1 on the EVM, respectively, as explained in
Section
SBOU216A – October 2018 – Revised June 2020
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4.3.
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INA901EVM-CVAL Evaluation Module User's Guide
Hardware
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