INA117PG4 - 200kHz High-CMV Difference Amp | Texas Instruments
MPN: INA117PG4 ✓ Hoạt độngINA117PG4 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho INA117PG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với INA117PG4 (cùng hình factor và footprint) — khác nhau ở Package.
INA117P
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Xem tài liệu →INA117PG4 Tỷ lệ tối đa & tính chất điện
| 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 |
| Điện áp cung cấp | 20 mA per channel |
| Gain | 1 (unity gain) |
| Khoảng nhiệt độ hoạt động | -40°C to +85°C |
| Temperature Grade | Industrial |
| Hộp | 8-pin plastic mini-DIP (PDIP) |
| Terminal Count | 8 terminals |
| Kiểu lắp đặt | Through-hole |
| Terminal Form | Through-hole |
| Package Shape | Rectangular |
Hướng dẫn cấu hình chân INA117PG4 rectangular
Cấu hình chân cho INA117PG4 (rectangular gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho INA117PG4.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
INA117PG4 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Dữ liệu tham khảo kỹ thuật cho INA117PG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Combines unity-gain difference amplification with a high common-mode range (vsINA117P)
- Supports signal acquisition beyond DC measurement (vsINA117P)
- Precision-oriented offset and instrumentation performance (vsINA117P)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
