Texas Instruments INA117KUG4

Overview

INA117KUG4 from Texas Instruments is a precision unity-gain high common-mode voltage difference amplifier designed for accurate differential measurement in harsh industrial environments. It features ±200V common-mode input range (at ±15V supply), ±500V input protection, 0.05% max gain error, 0.001% max nonlinearity, and 70dB minimum CMRR. It serves as a galvanic-isolation alternative in servo drive current sensing and semiconductor test equipment.

For engineers reviewing the INA117KUG4 datasheet, INA117KUG4 pinout, INA117KUG4 application, or INA117KUG4 equivalent, key selection criteria include verified ±200V CMV operation, laser-trimmed resistor network accuracy, SOIC-8 package compatibility, and CSO-specific bandwidth (200kHz/500kHz) and offset drift (3–8.5 µV/°C) performance.

Technical Context

The INA117KUG4 integrates a precision op amp with a monolithic thin-film resistor network laser-trimmed for ratio matching, enabling high CMRR without external trimming in most applications. Its transfer function supports both basic unity-gain mode (V_OUT = V_+IN – V_–IN) and extended mode with reference pin biasing (V_OUT = V_+IN – V_–IN + 20×V_REFA – 19×V_REFB).

Input protection circuitry withstands ±500V transient common-mode and differential overloads, while internal architecture avoids isolated power supplies-reducing system cost and noise. Bandwidth varies by chip site origin: 200kHz (CSO: SHE) or 500kHz (CSO: TID), with corresponding slew rates of 1.7–2.6 V/µs and 1.7–5 V/µs.

Key Specifications

Pinout & Package

The INA117KUG4 is supplied in an 8-pin SOIC (SO-8) surface-mount package measuring 3.91mm × 4.9mm, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high common-mode voltage difference amplifier applications.

Compared with INA149IP and AMC1301DWVR, the INA117KUG4 uniquely balances ±200V CMV capability, 0.001% nonlinearity, and reference-pin flexibility-making it optimal for cost-sensitive, non-safety-critical industrial measurement where precision and simplicity are prioritized over extreme voltage or isolation.

Availability

INA117KUG4 is available at Aetrix Electronics and suitable for motor drive current sensing, semiconductor ATE front-ends, and ultrasound transducer bias monitoring requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for INA117KUG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies, with over 50 years of precision amplifier innovation.

The INA117 product line delivers high common-mode voltage difference amplification for industrial, test, and medical instrumentation-designed to replace costly isolation solutions where galvanic separation is not safety-mandated.

FAQ

What is the maximum common-mode voltage the INA117KUG4 can handle continuously?

The INA117KUG4 supports continuous common-mode input voltages up to ±200V when operated with ±15V supplies. This rating is validated per TI's SBOS154C datasheet Section 5.1 Absolute Maximum Ratings and applies across the full –40°C to +85°C operating temperature range. Peak transient tolerance extends to ±500V for 0.1 seconds, providing robustness against surge events in industrial environments. The INA117KUG4 achieves this using integrated input protection circuitry and a precision thin-film resistor network.

Does the INA117KUG4 require external trimming for optimal CMRR performance?

No, the INA117KUG4 does not require external trimming for standard applications. Its laser-trimmed monolithic resistor network delivers ≥70dB CMRR without adjustment. However, series impedance >75Ω on either input pin or >4Ω on REFA/REFB pins degrades CMRR-so low-impedance source driving is essential. Optional trim circuits (Figures 7-2 and 7-3 in SBOS154C) exist only for applications demanding >86dB CMRR beyond the base specification. The INA117KUG4 is optimized for plug-and-play precision in servo drives and ATE systems.

How does the INA117KUG4 differ from the INA117P and INA117KU variants?

The INA117KUG4 is a tape-and-reel variant of the INA117KU, sharing identical SOIC-8 packaging, electrical specifications, and CSO (chip site origin) options (SHE or TID). The "G4" suffix denotes packaging configuration (7-inch reel, 2500-unit quantity) per TI's nomenclature in Section 8.1. Unlike the through-hole INA117P (DIP-8), the INA117KUG4 uses surface-mount construction for automated assembly. All three share the same pinout, transfer function, and thermal specs-but only the KU-series (including INA117KUG4) supports RoHS-compliant lead finish and MSL-2a reflow profile.

Can the INA117KUG4 operate from a single supply, and what is the minimum voltage?

Yes, the INA117KUG4 supports single-supply operation from 10V to 36V, as specified in Section 5.3 Recommended Operating Conditions. At 10V supply, output swing is reduced but remains functional for low-voltage differential sensing. Input common-mode range scales with supply rails-for example, at +12V/0V supply, usable CMV extends from –10V to +12V. The INA117KUG4's internal architecture allows rail-to-rail output capability and maintains 0.05% gain accuracy across the full single-supply range, making it suitable for portable industrial sensors and battery-powered test fixtures.

What is the bandwidth limitation of the INA117KUG4, and how does it vary by chip site origin?

The INA117KUG4 bandwidth depends on its chip site origin (CSO): 200kHz (–3dB) for CSO: SHE and 500kHz for CSO: TID, as documented in Section 5.5 Electrical Characteristics and Figure 6-13. This variation arises from two qualified fabrication flows-designers must select based on system trade-offs: CSO: SHE offers lower offset drift (8.5 µV/°C) for thermally stable applications, while CSO: TID provides higher bandwidth and lower drift (3 µV/°C) for dynamic signal capture. Both versions maintain identical pinout, protection, and package, ensuring drop-in compatibility within the same orderable part number family including INA117KUG4.