INA117P - ±200V High Common-Mode Difference Amplifier | TI
MPN: INA117P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.29 | $4,290.00 |
Drop-in alternatives for INA117P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
INA117PG4
✅ Drop-In📋 Reference alternative (not in catalog)
INA117KU
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →AD629ANZ
✅ Drop-In📋 Reference alternative (not in catalog)
INA149
✅ Drop-In📋 Reference alternative (not in catalog)
AD8479
✅ Drop-In📋 Reference alternative (not in catalog)
INA117P Maximum Ratings & Electrical Characteristics
| Amplifier Type | Precision Unity-Gain Difference Amplifier |
| Number of Channels | 1 |
| Gain (Fixed) | 1 V/V (unity) |
| Common-Mode Input Voltage Range | ±200 V |
| Nonlinearity | 0.001% max |
| Bandwidth | 200 kHz |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-Pin PDIP (P) |
| Mounting Type | Through Hole |
| Technology | Bipolar with integrated thin-film resistor network |
| Output | Ground-referenced single-ended |
| Manufacturer | Texas Instruments (originally Burr-Brown) |
| RoHS Status | Compliant |
INA117P 8-pin pdip (p) Pin Configuration Guide
Complete pinout information for INA117P (8-pin pdip (p) package). 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 INA117P.
Refer to the datasheet for full pin configuration.
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
INA117P is suitable for 6 applications: High-Side Current Sensing, DC Bus Voltage Monitoring, Battery Management Voltage Taps, Data Acquisition Front Ends, Motor Drive Phase and Shunt Feedback, Test and Measurement Instrumentation.
High-Side Current Sensing
The INA117P excels in high-side current sensing because its ±200V common-mode input range lets the amplifier inputs sit directly across a shunt resistor on a high-voltage rail while the output remains ground-referenced. Per the TI INA117 datasheet application circuits, the integrated thin-film resistor network attenuates the common-mode potential, and the 0.001% nonlinearity preserves shunt measurement accuracy across the load range. Placed across a milliohm-class shunt in a DC bus, the unity-gain difference configuration converts the shunt drop directly to a ground-referenced signal for an ADC. Unlike discrete resistor/op-amp front ends, the monolithic resistor matching holds CMRR over temperature, and the 200kHz bandwidth covers most industrial monitoring loops, though fast-switching ripple should be filtered externally.
Recommended
DC Bus Voltage Monitoring
In motor drives, solar inverters, and industrial power supplies, the DC bus voltage can sit at several hundred volts, far beyond what a conventional op amp input tolerates. The INA117P can be configured with external precision resistors, or used directly in its difference configuration, to measure small differential signals riding on up to ±200V of common-mode voltage, per the TI datasheet. The 0.001% nonlinearity ensures the monitoring channel does not distort bus-voltage readings used for control loops or protection decisions. Because the output is ground-referenced, it interfaces directly to microcontroller ADC inputs without additional isolation amplifiers at these common-mode levels. The 200kHz bandwidth is far more than adequate for bus-ripple monitoring, and the -40°C to +85°C range suits industrial enclosures.
Recommended
Battery Management Voltage Taps
Series battery stacks create large common-mode offsets between cell measurement points, and the INA117P's ±200V common-mode range allows it to extract the differential cell or block voltage without front-end dividers at moderate stack voltages. According to the TI INA117 datasheet, the precision thin-film resistor network maintains common-mode rejection over temperature, which matters because BMS accuracy requirements are typically in the millivolt-per-cell range. The unity-gain configuration adds no gain error beyond the small offset term, and the bipolar architecture provides low-noise readings for state-of-charge estimation. For higher-voltage stacks, the AD629 (±270V) or INA149 (±275V) equivalents extend the range in related footprints. Dual ±15V supplies must be provided and sequenced before applying stack voltage.
Recommended
Data Acquisition Front Ends
Industrial data-acquisition systems frequently measure small transducer signals in the presence of large ground-potential differences between sensor and acquisition chassis. The INA117P addresses this directly: its ±200V common-mode tolerance absorbs ground offsets that would saturate a conventional instrumentation amplifier input, while its 0.001% nonlinearity and integrated matched resistor network preserve the integrity of the differential signal, as documented in the TI INA117 datasheet. The 200kHz bandwidth accommodates vibration, thermal, and process signals, and the ground-referenced single-ended output drives standard ADC stages or programmable-gain stages downstream. In distributed measurement racks, using the PDIP-8 INA117P also simplifies prototyping and socketed rework on legacy through-hole DAQ boards.
Recommended
Motor Drive Phase and Shunt Feedback
Three-phase motor drives need shunt-based current feedback in the presence of large PWM common-mode transients. The INA117P's high common-mode immunity, derived from the on-chip thin-film network described in the TI INA117 datasheet, rejects the common-mode step while passing the shunt differential, and its 200kHz bandwidth covers the feedback loop of most industrial drives. The 0.001% nonlinearity keeps torque-control current loops accurate across the full load range. Note that for the fastest switching converters, an external RC filter at the inputs tames di/dt-induced spikes, and the device requires dual supplies available in typical drive control electronics. Its -40°C to +85°C industrial rating matches drive cabinet environments, and the through-hole PDIP-8 package suits high-vibration and serviceable industrial hardware.
Recommended
Test and Measurement Instrumentation
Bench instruments, differential probes, and rack measurement modules benefit from the INA117P's combination of ±200V common-mode tolerance and 0.001% linearity. As described in the TI INA117 datasheet, the monolithic precision op amp plus thin-film resistor network provides the accuracy foundation for differential-input measurement channels that must tolerate miswiring and large ground offsets without damage or gross error. The unity-gain topology means the front end adds minimal gain error, simplifying system calibration, while the 200kHz bandwidth suits general-purpose instrument front ends for audio-band through ultrasonic signals. The PDIP-8 package also supports socketed calibration modules and field-replaceable input cards, a common requirement in serviceable measurement hardware specified from -40°C to +85°C.
Recommended
Recommended Products Summary
Engineering reference data for INA117P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | INA117PG4 | INA117KU | AD629ANZ | INA149 | AD8479 |
|---|---|---|---|---|---|---|
| Package | 8-Pin PDIP | 8-Pin PDIP - same | SO-8 (same die, SMT footprint) | 8-Pin PDIP - same | SOIC-8 | SOIC-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments | Analog Devices |
| Common-Mode Input Range | ±200 V | ±200 V | ±200 V | ±270 V | ±275 V | [DATA_NEEDED] |
| Gain | 1 V/V (unity, fixed) | 1 V/V | 1 V/V | 1 V/V | 1 V/V | 1 V/V |
| Nonlinearity | 0.001% | 0.001% | 0.001% | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Bandwidth | 200 kHz | 200 kHz | 200 kHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Current | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | 0.81 mA (per TI comparison) | [DATA_NEEDED] |
Key Differentiators
- Only family member in through-hole PDIP-8 for serviceable designs (vs INA117KU)
- Extended common-mode range versus baseline part (vs AD629ANZ)
- Lower power successor available for new SMT designs (vs INA149)
Design Notes
Never apply large common-mode input voltages before the INA117P supplies are established. The ±200V common-mode rating holds only with supplies present; without power, the internal resistor network can present the high voltage to the unprotected amplifier input, risking damage. In systems where the measured bus may be live before the analog supplies, add a supply-sequencing supervisor or series input protection, and verify with the TI INA117 datasheet absolute-maximum section before finalizing the input network.
The PDIP-8 INA117P is often used with a socket for serviceability. Use a low-profile machined-pin socket and keep the high-impedance input traces short and guarded. Place a 0.1uF ceramic capacitor directly across the positive and negative supply pins to the ground reference, and add a 10uF bulk capacitor nearby. Because the input pins carry attenuated high-voltage-derived signals, maintain creepage and clearance appropriate to your working voltage on the PCB around the device per your end-product safety requirements.
In switching-converter or PWM environments, add a first-order RC filter (for example a few hundred ohms series with 1nF to the reference node) at the INA117P inputs to attenuate fast common-mode edges that exceed the 200kHz signal bandwidth. Estimated: a 330 ohm / 1nF combination gives a pole near 480kHz, leaving the measurement band untouched while rolling off switching noise. Verify CMRR at your switching frequency using the datasheet CMRR-versus-frequency curve rather than the DC figure.
The INA117P is specified for dual-supply operation with ±15V as the reference condition in the TI datasheet application circuits. Confirm the actual supply limits and output swing for your rails from the datasheet before substituting asymmetric supplies, and budget headroom so the output can reach the levels your ADC requires. If only a single supply is available, the device is not a suitable choice - select a single-supply difference amplifier instead.
Compliance Information
RoHS compliant per TI product page and DigiKey listing. REACH, halogen-free, and conflict-minerals status not stated in the provided data - consult TI material declarations.
