Datasheet

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Introduction and Warnings

1.3 Evaluation Module Limitations & Warnings

As a result of the high common-mode input voltage rating of the INA149, evaluation of the device often

involves high-voltage operation. As a difference amplifier, it may also be used in current-sensing

applications. In addition to voltage and current limitations, proper electrostatic discharge precautions are

recommended.

1.3.1 High Voltage

The common-mode input voltage rating of the INA149 is ±275 V. When using the device and EVM under

such circumstances, all proper safety practices must be followed. Do not apply more than ±275 V

common-mode.

1.3.2 High Current

For current-sensing applications, an unpopulated pad is provided for a sense resistor (RSENSE). The

sense resistor trace has a maximum current rating of 5 A. Ensure that the power rating of the sense

resistor is sufficient for the application.

1.3.3 Electrostatic Discharge

Many of the components on the INA149EVM are susceptible to damage by electrostatic discharge (ESD).

Customers are advised to observe proper ESD handling precautions when unpacking and handling the

EVM, including the use of a grounded wrist strap at an approved ESD workstation.

SBOU119– November 2011 INA149EVM

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