INA117SMQ

Overview

The INA117SMQ is a high common-mode voltage difference amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 36 V and draws a typical operating current of 1.5 mA. The device features a gain bandwidth product of 200 kHz, a slew rate of 2.6 V/us, and a common-mode rejection ratio (CMRR) of 70 dB. Input offset voltage is specified at 600 uV, with an output current capability of 20 mA per channel. It supports a fixed gain of 1 V/V with a gain error of 0.02%. The component functions reliably across an operating temperature range from -40 C to +85 C.

Feature Summary

• Provides precise measurement of small differential voltages in the presence of high common-mode signals up to ±200V.
• Input circuitry protects against instantaneous common-mode or differential overloads up to ±500V.
• Enables accurate signal conditioning in applications where electrical isolation is not required.

Applications

• Precision measurement systems requiring high common-mode voltage tolerance
• Industrial sensor interfaces without galvanic isolation
• Data acquisition systems handling large common-mode offsets

Procurement Notes

Verify the specific suffix 'SMQ' indicates the TO-99-8 metal can package variant distinct from standard plastic packages. Confirm moisture sensitivity level requirements for storage and reflow processes. Ensure the ordering part number matches the exact pinout and thermal characteristics defined in the official datasheet before finalizing procurement specifications.

Selection Notes

Select this component when the application demands high common-mode voltage rejection exceeding standard instrumentation amplifiers. The fixed unity gain configuration simplifies external resistor networks. Consider the TO-99 package for superior thermal performance and hermetic sealing compared to plastic alternatives in harsh environments.

Part Context

This device belongs to the INA117 family of high common-mode voltage difference amplifiers. It serves as a specialized solution for isolating small differential signals from large common-mode potentials. The SMQ designation specifically refers to the ceramic flat pack or TO-99 style packaging offered by Texas Instruments for robust industrial use cases.

Replacement Considerations

Direct substitutes include other parts within the INA117 series such as INA117KU or INA117SM, provided the package type and suffix match the board layout. Verify that alternative components maintain the same ±500V overload protection and high common-mode voltage capabilities.

FAQ

What is the maximum overload voltage the INA117SMQ inputs can withstand?

The inputs can withstand instantaneous common-mode or differential overloads up to ±500V without damage.

Does the INA117SMQ require external resistors for its standard operation?

No, the INA117SMQ is designed with a fixed internal gain of 1 V/V, eliminating the need for external gain-setting resistors.