The INA117 is a precision unity-gain difference amplifier with very high common-mode input voltage range. The INA117 is a single monolithic IC consisting of a precision op amp and integrated thin-film resistor network. The device can accurately measure small differential voltages in the presence of common-mode signals up to ±200V. The INA117 inputs are protected from momentary common-mode or differential overloads up to ±500V.
In many applications, where galvanic isolation is not essential, the INA117 can replace isolation amplifiers. This design can eliminate costly isolated input-side power supplies and the associated ripple, noise, and quiescent current. The INA117 offers low nonlinearity of 0.001% and a wide bandwidth of 200kHz (CSO: SHE) or 500kHz (CSO: TID) (see specification note in Section 5).
The INA117 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, specified for the –40°C to 85°C temperature range.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | INA117 High Common-Mode Voltage Difference Amplifier datasheet (Rev. C) | PDF | HTML | Jan 12, 2026 |
| Application brief | Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) | PDF | HTML | Dec 5, 2024 | |
| Application note | INA117 and INA149 Differential Input Range (Rev. A) | PDF | HTML | Jun 4, 2020 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | Mar 28, 2017 | |
| More literature | A High-Voltage Bidirectional Current Source | Dec 19, 2013 | ||
| Application note | ±200V Difference Amplifier with Common-Mode Voltage Monitor | Sep 27, 2000 | ||
| Application note | Input Filtering The INA117 ±200V Difference Amplifier | Sep 27, 2000 | ||
| Application note | Extending the Common-Mode Range of Difference Amplifiers | Sep 27, 2000 | ||
| Application note | Implementation and Applications of Current Sources and Current Receivers | Sep 27, 2000 | ||
| Application note | AC Coupling Instrumentation and Difference Amplifiers | Sep 27, 2000 |
For additional terms or required resources, click any title below to view the detail page where available.
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TO-CAN (LMC) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
| PDIP (P) | 8 | Ultra Librarian |
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