INA117P-BI - ±200V Common-Mode Differential Amplifier | TI
MPN： INA117P-BI ✓ 啟用中INA117P-BI 概覽
A difference amplifier is a voltage-feedback amplifier that amplifies the voltage difference between two input terminals while rejecting voltage common to both inputs. The INA117P-BI is intended for applications where the signal of interest is small but the surrounding common-mode voltage can be large. Its ±200V common-mode input range is particularly useful when measuring small voltages across high-voltage bus systems, power-conversion circuits, and industrial equipment.
Key performance specifications include a maximum unity-gain error of 0.02%, a maximum nonlinearity of 0.001%, a minimum CMRR of 86dB, and protected inputs rated at ±500V common-mode and ±500V differential. The device operates from a single supply or dual supply arrangement described by the manufacturer datasheet, and its specified operating temperature range is -40°C to +85°C. The INA117 family is also available in an 8-pin SO-8 surface-mount package for compact designs.
The INA117P-BI is suitable for precision measurement, power-supply monitoring, current-shunt instrumentation, and analog signal-conditioning systems. Its integrated thin-film network improves gain matching and common-mode rejection without requiring external matched resistors. Designers should still provide input protection appropriate to the application, maintain the specified supply limits, and account for input bias-current effects and thermal conditions at the measurement nodes.
For PCB implementation, place the amplifier close to the sensing components and route high-voltage and sensitive-signal paths to minimize leakage, contamination, and coupling. Use guarded grounding and clean analog return paths when measuring microvolt-level signals. The 8-pin PDIP format supports through-hole prototyping and repair, while the SO-8 alternative is preferable where board area is constrained. This page combines the manufacturer specifications, package details, sourcing information, and design guidance needed to evaluate the INA117P-BI for high-common-mode measurement systems.
直接替換替代品，適用於 INA117P-BI — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： INA117P-BI （相同外形與佔位） — 差異在於 Bandwidth, Package, Mounting Type, Nonlinearity, Operating Temperature Range.
INA117P
✅ 直接替換聯絡詢價
查看資料表 →AD629ANZ
✅ 直接替換📋 參考替代品（不在目錄中）
INA117P-BI 最大額定值與電氣特性
| Device Type | Precision unity-gain difference amplifier |
| Number of Circuits | 1 |
| Common-Mode Input Range | ±200V |
| Protected Common-Mode Input | ±500V |
| Protected Differential Input | ±500V |
| Unity-Gain Error | 0.02% maximum |
| Nonlinearity | 0.001% maximum |
| CMRR | 86dB minimum |
| Bandwidth | 200kHz for CSO: SHE; 500kHz for CSO: TID |
| Architecture | Precision operational amplifier with integrated thin-film resistor network |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 8-pin plastic mini-DIP |
| 安裝類型 | Through-hole |
| 輸出類型 | Single-ended analog output |
| Input Protection | Protected inputs up to ±500V common-mode and differential |
| AEC-Q100 Qualification | Not applicable |
INA117P-BI 8-pin plastic mini-dip 腳位配置指南
INA117P-BI（8-pin plastic mini-dip 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： INA117P-BI.
請參閱 資料表 以查看完整腳位配置。
典型應用
INA117P-BI 適用於 6 應用s: High-Voltage Bus Differential Sensing, Power-Supply Monitoring, Current-Shunt Instrumentation, Industrial Sensor Signal Conditioning, Analog-to-Digital Converter Front End, Precision Analog Measurement Systems.
High-Voltage Bus Differential Sensing
The INA117P-BI is appropriate for measuring a small voltage difference across a high-voltage bus while both input nodes carry a large common-mode potential. Its specified ±200V common-mode input range and 86dB minimum CMRR help preserve the differential measurement when the bus voltage is much larger than the signal being measured. The device can sit near the sensing points in an instrumentation circuit, followed by downstream filtering and isolation. Input protection, creepage, clearance, leakage current, and PCB contamination must be checked against the actual bus voltage because the component rating alone does not determine safe system behavior.
推薦
Power-Supply Monitoring
The INA117P-BI can monitor the small differential error between two power-system nodes without requiring the front end to operate near ground potential. Its unity-gain architecture, 0.02% maximum gain error, and 0.001% maximum nonlinearity support accurate supervisory and fault-detection measurements. The amplifier is useful where a controller must observe a regulated rail, a floating supply, or a difference between two related voltage nodes. Designers should confirm supply limits and output-swing requirements in the manufacturer datasheet, and should keep the high-voltage path physically separated from sensitive control circuitry.
推薦
Current-Shunt Instrumentation
The INA117P-BI can amplify the small differential voltage produced by a current-shunt resistor while rejecting voltage common to both shunt terminals. The ±200V common-mode range is useful when the shunt is located in a high-side or otherwise elevated circuit, while the integrated thin-film network simplifies gain matching. The resulting signal can feed an ADC, comparator, or analog-to-digital conversion stage. For accurate results, maintain symmetrical input routing, provide suitable shunt and filtering components, and account for input bias current and parasitic leakage across the measurement loop.
推薦
Industrial Sensor Signal Conditioning
The INA117P-BI can condition differential sensor signals in industrial systems where the sensor output is small and the surrounding process common-mode voltage is substantial. Its high common-mode rejection helps reduce errors from power switching and industrial noise, while the unity-gain configuration supports straightforward signal-chain integration. The device is especially relevant for sensors connected to high-voltage equipment, provided that the complete front end includes proper protection, isolation where required, and a layout that minimizes leakage and capacitive coupling. The specified -40°C to +85°C range supports many industrial temperature environments.
推薦
Analog-to-Digital Converter Front End
The INA117P-BI can serve as the differential input stage for an ADC when the source signal requires common-mode rejection before conversion. Its unity-gain error of 0.02% maximum and nonlinearity of 0.001% maximum help preserve signal integrity, while the protected inputs can simplify the input-protection strategy in suitable applications. The system designer should verify ADC input range, amplifier output swing, settling requirements, and bandwidth interaction. Place the amplifier close to the ADC input and use short, symmetric traces to reduce added error and noise before digitization.
推薦
Precision Analog Measurement Systems
The INA117P-BI is suitable for laboratory and instrumentation systems that measure small differential voltages in the presence of large reference or operating voltages. The precision resistor network and high CMRR reduce the need for external resistor matching, making the device practical for repeatable measurement modules. Its through-hole 8-pin mini-DIP package is convenient for prototyping, educational platforms, and repairable industrial instruments. For low-level signals, use clean grounds, guarded input routing, calibrated test points, and an appropriate output low-pass filter to control the measurement bandwidth.
推薦
推薦產品摘要
工程參考資料，適用於 INA117P-BI — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | INA117P | AD629ANZ | INA117BM | INA117KU |
|---|---|---|---|---|---|
| Package | 8-pin plastic mini-DIP | 8-pin plastic mini-DIP | PDIP-8 | 8-pin package; exact code requires confirmation | 8-pin package; exact code requires confirmation |
| Brand | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments | Texas Instruments |
| Function | Precision unity-gain difference amplifier | Precision unity-gain difference amplifier | Differential amplifier | INA117-family difference amplifier | INA117-family difference amplifier |
主要差異化特點
- Very high common-mode operating range (對比AD629ANZ)
- Integrated precision resistor network (對比AD629ANZ)
- Input fault-tolerance margin (對比INA117P)
設計說明
Route the two differential inputs symmetrically and keep them away from switching nodes, inductors, and high-current traces. The INA117P-BI relies on common-mode rejection, so unequal input routing can introduce error even when the amplifier itself has excellent CMRR. Use a guarded ground or driven guard around sensitive input nodes where practical, and maintain cleanliness around the input pins to avoid leakage-induced errors.
Design the input-protection network for the actual common-mode and differential fault conditions. The manufacturer specifies protected inputs at ±500V common-mode and differential, but that rating does not remove the need for clamping, current limiting, creepage, clearance, and safe fault-energy analysis. Verify that protection leakage does not compromise the small differential signal being measured.
Do not treat the INA117P-BI as a general-purpose unity-gain buffer or assume that any difference amplifier can replace it. The critical selection criteria are the ±200V common-mode range, input protection, CMRR, gain error, nonlinearity, supply requirements, and exact 8-pin mechanical footprint. For the INA117P-BI package, use the manufacturer pin-configuration table and verify that the PCB footprint matches the plastic mini-DIP outline.
Set the system bandwidth according to the measurement bandwidth rather than automatically using the highest available option. A wider bandwidth can reduce measurement response time but increases sensitivity to high-frequency noise and coupling. Use short signal traces, proper grounding, and input filtering that preserves differential symmetry. Estimate the maximum amplifier dissipation from the actual supply, output voltage, and load before finalizing the layout.
合規資訊
The manufacturer materials describe the INA117 family and package options, but no explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified in the retrieved manufacturer snippets. Verify current compliance documents before procurement or release.
