INA117KU/2K5 - High Common-Mode Voltage Difference Amplifier | TI
MPN: INA117KU/2K5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.25 | $3.25 |
| 10 | $3.05 | $30.50 |
| 100 | $2.85 | $285.00 |
| 500 | $2.7 | $1,350.00 |
| 1,000 | $2.55 | $2,550.00 |
Drop-in alternatives for INA117KU/2K5 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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INA117KU
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →INA117KU/2K5G4
✅ Drop-In📋 Reference alternative (not in catalog)
INA117KU/2K5 Maximum Ratings & Electrical Characteristics
| Amplifier Type | Precision difference amplifier (differential amplifier) |
| Number of Circuits | 1 |
| Gain | Unity gain (G = 1 V/V) |
| Gain Error (max) | 0.02% |
| Nonlinearity (max) | 0.001% |
| CMRR (min) | 86 dB |
| Common-Mode Input Range | +/-200 V at VS = +/-15 V |
| Input Protection | +/-500 V common-mode and +/-500 V differential (protected inputs) |
| Bandwidth | 200 kHz (KU package per datasheet specification note) |
| Input Offset Voltage (max) | 1000 uV (per distributor parametric data) |
| Operating Temperature Range | -40C to +85C |
| Package | 8-SOIC (SO-8) surface mount |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel, 2500 units (/2K5) |
| Technology | Bipolar monolithic IC with integrated thin-film resistor network |
INA117KU/2K5 8-soic (so-8) surface mount Pin Configuration Guide
Complete pinout information for INA117KU/2K5 (8-soic (so-8) surface mount package) with 8 pins. This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for INA117KU/2K5.
Refer to the datasheet for full pin configuration.
Estimated pin count: 8 pins (analog package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
INA117KU/2K5 is suitable for 6 applications: DC Bus and Motor Drive Voltage Sensing, Battery Pack Monitoring, Industrial Process Control Interfaces, Data Acquisition and Test Systems, Power Supply and Inverter Current Shunt Monitoring, Medical and Analytical Instrumentation Front Ends.
DC Bus and Motor Drive Voltage Sensing
The INA117KU/2K5 fits DC bus and motor-drive monitoring because its +/-200V common-mode input range at +/-15V supplies lets a unity-gain difference amplifier directly measure a small sense signal riding on a high bus voltage. The 86dB minimum CMRR rejects bus ripple and ground offsets, while 0.001% maximum nonlinearity preserves measurement fidelity across the drive's load range. In the circuit, the amplifier's inputs connect across the shunt or divider output, and its ground-referenced output feeds an ADC on the controller. The +/-500V input protection tolerates inrush and switching transients that would destroy ordinary op amps, at the cost of a bipolar supply requirement.
Recommended
Battery Pack Monitoring
High-voltage battery stacks in UPS systems, telecom rectifiers, and energy storage need cell-or-block voltage measurement with strong common-mode rejection. The INA117KU/2K5 addresses this with its +/-200V common-mode range and integrated trimmed resistor network, which avoids the resistor-matching errors that dominate discrete difference-amplifier CMRR. Its 0.02% maximum gain error keeps block-voltage readings accurate without per-unit calibration. Placed between the battery tap point and the supervisory ADC, the amplifier translates a floating differential voltage to a ground-referenced 0-5V signal. The 200kHz bandwidth also supports transient monitoring during charge and discharge switching, though designers must budget for the bipolar +/-15V supply rail.
Recommended
Industrial Process Control Interfaces
Industrial transducers - pressure, level, current shunts - often produce small differential signals contaminated by large ground potential differences between sensor and controller. The INA117KU/2K5 solves this with 86dB minimum CMRR, a +/-200V common-mode window that tolerates ground faults, and 0.001% maximum nonlinearity for accurate 4-20mA-derived measurements. The unity-gain architecture means no gain resistors to drift, and the laser-trimmed thin-film network holds 0.02% gain error over the -40C to +85C industrial range. Signal-conditioning cards typically place the amplifier directly at the terminal block, with its output scaling to a single-supply ADC; the protected +/-500V inputs add robustness against miswiring during field installation.
Recommended
Data Acquisition and Test Systems
Data-acquisition front ends must reject common-mode noise from mains pickup, switching supplies, and ground loops while digitizing differential sources. The INA117KU/2K5 provides a clean, fixed unity-gain difference stage with 200kHz bandwidth (KU package per TI's specification note) and 0.001% maximum nonlinearity, well matched to 12-16 bit digitizers. Because gain accuracy is trimmed on-chip to 0.02% maximum, multi-channel DAQ boards avoid per-channel calibration across the -40C to +85C range. In a typical channel, the amplifier sits between the input connector protection network and a programmable-gain amplifier or SAR ADC. Its high-voltage tolerance also protects downstream circuitry when users connect live equipment inputs.
Recommended
Power Supply and Inverter Current Shunt Monitoring
Inverters, welders, and switch-mode power supplies monitor load current through shunt resistors that may sit tens or hundreds of volts above ground. The INA117KU/2K5 measures across such shunts using its +/-200V common-mode range, delivering a ground-referenced output proportional to shunt voltage with 0.02% maximum gain error. The 86dB minimum CMRR keeps PWM switching noise out of the measurement, and the 200kHz bandwidth captures current-ripple detail for control loops. The +/-500V input protection survives shoot-through faults that exceed normal sensing limits. Designers should follow the datasheet's input series-resistance guidance so the protection rating holds under continuous overvoltage, and verify thermal dissipation in the thin-film network at high sustained common-mode voltages.
Recommended
Medical and Analytical Instrumentation Front Ends
Analytical and patient-adjacent instrumentation - electrophoresis supplies, photometer detectors, lab power supplies - measure small differential signals in the presence of large DC offsets generated by high-voltage excitation sources. The INA117KU/2K5 handles common-mode voltages to +/-200V while providing 0.001% maximum nonlinearity, critical where measurement linearity drives analytical accuracy. Its monolithic trimmed resistor network ensures channel-to-channel matching across multi-detector instruments, and the -40C to +85C rating supports equipment calibration margins. In the front end, the amplifier converts the floating detector output to a ground-referenced signal for a precision ADC or lock-in stage; low offset drift matters here, so compliance declarations for the target safety standard should be verified with TI before design-in.
Recommended
Recommended Products Summary
Engineering reference data for INA117KU/2K5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA117KU | INA117KU/2K5G4 |
|---|---|---|---|
| Package | 8-SOIC (SO-8) | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Common-Mode Input Range | +/-200 V (VS = +/-15 V) | +/-200 V | +/-200 V |
| Input Protection | +/-500 V CM and differential | +/-500 V | +/-500 V |
| Gain Error (max) | 0.02% | 0.02% | 0.02% |
| Nonlinearity (max) | 0.001% | 0.001% | 0.001% |
| CMRR (min) | 86 dB | 86 dB | 86 dB |
| Packing | Tape & Reel, 2500 pcs (/2K5) | Tube | Tape & Reel, 2500 pcs (Green ordering code) |
Key Differentiators
- True monolithic high common-mode difference amplifier (vs INA118U/2K5)
- No external precision resistors required (vs Discrete op-amp subtractor)
- Trade-off: fixed unity gain only (vs INA118UB)
Design Notes
The +/-500V input protection of the INA117KU/2K5 holds only when the datasheet input series-resistance recommendations are followed. Sustained overvoltage with excessive input current will defeat the internal protection. Do not treat the part like a generic SOIC-8 op amp - pin functions include a reference/ground structure specific to the difference-amplifier topology, so verify the datasheet pinout before layout. Also remember the device needs symmetric bipolar supplies (typically +/-15V) for the full +/-200V common-mode range; single-supply operation will not achieve rated specifications.
To preserve the 86dB minimum CMRR, keep the input traces to the INA117KU/2K5 short and symmetrical. Any imbalance in series resistance or parasitic capacitance between the two inputs converts common-mode voltage into differential error, especially with the high dV/dt switching noise typical of motor drives and inverters. Place the amplifier close to the sense point, use a solid ground plane, and decouple V+ and V- with 0.1uF ceramics directly at the pins plus bulk capacitance nearby. Avoid routing high-voltage bus traces under or beside the amplifier inputs.
The INA117KU/2K5 operates from bipolar supplies, typically +/-15V, and its rated +/-200V common-mode range is specified at VS = +/-15V. Budget supply headroom conservatively: running at reduced supplies shrinks the usable common-mode window. Estimated power dissipation is modest at quiescent level, but continuous high common-mode input across the internal thin-film resistor network adds dissipation inside the IC; for designs sitting at the common-mode limit continuously, verify junction temperature against the SO-8 thermal resistance and derate accordingly per the TI datasheet thermal data.
Compliance Information
TI offers the INA117 family in Green/RoHS-compliant ordering codes (e.g., INA117KU/2K5G4); compliance for the exact /2K5 suffix should be confirmed on the TI product page. AEC-Q100 qualification is not claimed in the provided data.
