INA117PG4 - 200kHz High-CMV Difference Amp | Texas Instruments
料号： INA117PG4 ✓ 量产中INA117PG4 概述
A difference amplifier is a specialized operational-amplifier circuit that subtracts two input voltages and rejects their common component. This product type belongs to the hierarchy of difference amplifier, instrumentation amplifier, operational amplifier, and analog signal-conditioning IC. It is useful when a sensor or measurement node produces a small differential signal over a larger voltage reference or operating range.
Key characteristics include an input offset voltage of 1 mV, 70 dB instrumentation-amplifier performance, 200 kHz bandwidth, and a 2.6 V/us slew rate. Its ±5 V to ±18 V supply range supports positive, negative, and split-supply operation. The single-amplifier configuration integrates the precision operational amplifier and resistive network needed for unity-gain differential measurement.
The INA117PG4 uses a monolithic integrated circuit containing a precision op amp and thin-film resistor network. Its architecture supports accurate measurement of small differential voltages while suppressing common-mode voltage. The listed 20 mA per channel and 70 dB performance describe the device as an instrumentation-oriented difference amplifier rather than a general-purpose unity-gain buffer.
Typical uses include high-side current measurement, bridge-sensor signal conditioning, battery monitoring, instrumentation inputs, and precision differential-to-single-ended conversion. Its broad common-mode range is especially useful when the measured difference is small relative to the voltage common to both input terminals. The 200 kHz bandwidth also makes it suitable for applications that need more signal bandwidth than a slow precision-only amplifier.
Design the circuit so the common-mode voltage and differential input remain within the device's operating limits. Use a stable, low-noise reference when a nonzero differential threshold is required, and provide adequate bypassing around the supply pins. Because it is an 8-pin through-hole package, the INA117PG4 is convenient for prototyping, educational instruments, and industrial control boards with conventional DIP mounting.
This product record combines the manufacturer's device classification with package, electrical, environmental, and application details, while adding comparison guidance and engineering design notes for faster component selection.
直接替换替代料： INA117PG4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： INA117PG4 （相同外形与封装尺寸） ——差异在于 Package.
INA117PG4 最大额定值与电气特性
| Amplifier Type | Precision unity-gain difference amplifier |
| Number of Amplifiers | 1 amplifier |
| Bandwidth | 200 kHz |
| Slew Rate | 2.6 V/us |
| Input Offset Voltage | 1 mV |
| Supply Voltage Range | ±5 V to ±18 V |
| Instrumentation Performance | 70 dB |
| 电源电流 | 20 mA per channel |
| Gain | 1 (unity gain) |
| 工作温度范围 | -40°C to +85°C |
| Temperature Grade | Industrial |
| 封装 | 8-pin plastic mini-DIP (PDIP) |
| Terminal Count | 8 terminals |
| 安装方式 | Through-hole |
| Terminal Form | Through-hole |
| Package Shape | Rectangular |
INA117PG4 rectangular 引脚配置指南
INA117PG4（rectangular 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： INA117PG4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
INA117PG4 适用于 6 应用s: High-Side Current Sensing, Bridge-Sensor Signal Conditioning, Battery-Voltage Monitoring, Precision Differential-to-Single-Ended Conversion, Instrumentation Signal Conditioning, Educational and Laboratory Measurement.
High-Side Current Sensing
The INA117PG4 fits high-side current sensing because it measures the small differential voltage across a shunt while rejecting the much larger voltage shared by both shunt terminals. Its 200 kHz bandwidth supports faster current transients than a static precision amplifier, while the 2.6 V/us slew rate helps preserve pulse fidelity. The ±5 V to ±18 V supply range also permits split-rail operation in many instrumentation circuits. Confirm that the maximum common-mode voltage at the shunt never exceeds the device limits, and select the shunt and external gain stage so the differential signal remains within the amplifier's linear operating region.
推荐
Bridge-Sensor Signal Conditioning
The INA117PG4 is appropriate for bridge-sensor conditioning when the sensor produces a small differential output over a substantial common-mode voltage. Its unity-gain difference-amplifier architecture subtracts the two bridge nodes and suppresses their shared component, providing a direct route to a precision measurement signal. The 1 mV listed input offset and 70 dB instrumentation performance are important when the bridge output is small. Use a regulated excitation source, keep both input nodes within their common-mode limits, and verify output headroom under the maximum excitation and sensor-imbalance conditions.
推荐
Battery-Voltage Monitoring
The INA117PG4 can monitor a differential battery or power-system voltage when one measurement point is referenced to a higher potential. Its high common-mode capability makes it useful for sensing changes across a shunt, sensing element, or floating differential source, while 200 kHz bandwidth supports dynamic measurements beyond DC-only instruments. The dual supply range of ±5 V to ±18 V allows operation from positive, negative, or split rails. Confirm the input common-mode and absolute maximum limits at startup, battery disconnect, and transient conditions because those conditions determine whether additional protection or attenuation is required.
推荐
Precision Differential-to-Single-Ended Conversion
The INA117PG4 converts a small differential signal into a single-ended output for an ADC, comparator, or control system. Its unity-gain architecture simplifies signal-chain design when the source already provides the required differential voltage, and its 200 kHz bandwidth gives adequate margin for many instrumentation and industrial-control signals. The 2.6 V/us slew rate limits large-signal distortion, while the 1 mV offset specification matters when the represented differential quantity is very small. Check the output swing, input common-mode range, and grounding arrangement to prevent clipping or loss of resolution near either signal limit.
推荐
Instrumentation Signal Conditioning
The INA117PG4 supports instrumentation signal conditioning where a sensor, transducer, or test fixture produces two correlated voltages that must be differenced. Its precision unity-gain implementation helps remove common-mode noise before a downstream ADC or measurement converter evaluates the signal. The listed 70 dB instrumentation performance and 1 mV input offset are particularly relevant to low-level differential measurements, while 200 kHz bandwidth accommodates many diagnostic waveforms. Place the device close to the source where practical, maintain symmetric routing, and use local supply bypassing to prevent supply-disturbance components from reaching the differential input.
推荐
Educational and Laboratory Measurement
The INA117PG4 is practical for educational and laboratory measurement boards because its 8-pin through-hole plastic mini-DIP package is easy to socket, probe, replace, and inspect. It demonstrates the relationship between a precision difference amplifier, high common-mode rejection, and unity-gain differential measurement without requiring a complex surface-mount assembly. The 200 kHz bandwidth also permits basic waveform and transient demonstrations beyond static voltage measurement. For teaching platforms, document the pin mapping from the manufacturer datasheet, provide accessible test points, and include protection against accidental input overvoltage or supply reversal.
推荐
工程参考数据： INA117PG4 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | INA117P |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 8-pin plastic mini-DIP (PDIP) | 8-pin plastic mini-DIP (PDIP) |
| Function | Precision unity-gain difference amplifier | INA117-family difference amplifier |
| Number of Amplifiers | 1 amplifier | 1 amplifier |
关键差异点
- Combines unity-gain difference amplification with a high common-mode range （对比 INA117P)
- Supports signal acquisition beyond DC measurement （对比 INA117P)
- Precision-oriented offset and instrumentation performance （对比 INA117P)
设计说明
Check the common-mode input voltage at every operating condition, including startup, shutdown, and the highest expected source voltage. A high common-mode range is the primary reason to choose INA117PG4, but it does not remove the need to comply with the manufacturer's absolute maximum ratings. Add series resistance or other protection when transient voltage, fault current, or supply reversal could otherwise reach the input terminals.
Route the two difference inputs as a closely matched pair and keep them away from switching nodes and high-current paths. Place input and output grounding consistently so the amplifier subtracts the intended signals rather than ground-potential differences. Because this is an 8-pin through-hole device, check the physical DIP footprint and pin numbering against the manufacturer diagram before artwork release.
Use ±5 V to ±18 V supplies within the specified range and place suitable bypass capacitors close to the supply pins. For split-rail operation, establish the ground reference before applying signal. Stable reference and supply nodes reduce output errors that can otherwise appear as input-referred measurement noise, especially in precision bridge and shunt measurements.
The 200 kHz bandwidth and 2.6 V/us slew rate support many moderate-bandwidth measurement signals, but they do not remove the need for input filtering. Determine the highest expected transient and interference frequency, then evaluate whether additional input or output filtering is required. Avoid capacitively feeding fast edges through high-impedance sensor wiring into the differential inputs.
合规信息
The INA117 is an industrial-grade product, but no specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified for the exact INA117PG4 ordering code.
