MC34071D - 44V Single-Supply Operational Amplifier | onsemi
MPN： MC34071D ✓ 啟用中MC34071D 概覽
An operational amplifier is a high-gain differential amplifier used to amplify small input signals, buffer sensors, drive analog stages, and implement feedback-control networks. The MC34071 belongs to the broader hierarchy of operational amplifier, analog amplifier, signal-conditioning IC, and semiconductor. Although the MC34071 family can operate from split supplies, it is particularly suited to single-supply operation, which simplifies circuits whose signal reference is close to the lower supply rail.
The family provides 4.5 MHz of gain-bandwidth product, a 13 V/µs slew rate, and fast settling time without using JFET device technology. The specified single-supply performance is defined at 5.0 V. The amplifiers are also functional at 3.0 V at 25°C, although bandwidth, slew rate, DC gain, and other parameters may change in that operating region. This distinction is important when designing at the minimum supply voltage.
The bipolar process supports operation from a single 5.0 V supply or higher while accommodating input and output signals referenced toward ground. The wide 44 V maximum supply rating provides additional operating headroom for industrial systems while retaining the usual bipolar advantages of low input-voltage noise and accurate behavior around the output operating point. Designers should still use the manufacturer datasheet limits for input common-mode range, output swing, supply current, and stability with the selected gain and load.
Typical uses include sensor-interface amplifiers, low-side current measurement, industrial control loops, audio and communications signal conditioning, active filtering, and general-purpose analog processing. Because the amplifier is optimized for single-supply operation, input and output signal levels must remain inside the datasheet common-mode and output-swing limits. Input common-mode limits depend on supply voltage and gain, so a signal that is valid at 5 V may not remain valid at 3 V.
The main design consideration is supply headroom. Use decoupling close to the supply pins, verify that the selected feedback network remains stable at the intended noise gain, and check output-current capability for the load and output-voltage conditions. The MC34071 is not intended to replace a rail-to-rail input or output amplifier where signals exceed its specified common-mode or swing limits.
This page combines verified manufacturer and distributor information with practical selection criteria, sourcing guidance, and verified same-package alternatives. It highlights where the MC34071D fits, where its non-rail-to-rail architecture requires careful signal-range review, and which replacement MPNs should be checked against the full datasheet before substitution.
直接替換替代品，適用於 MC34071D — 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。
MC34071DG
✅ 直接替換📋 參考替代品（不在目錄中）
MC34071AP
✅ 直接替換📋 參考替代品（不在目錄中）
MC34071ADR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC34071DR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC34071D 最大額定值與電氣特性
| Device Type | Single operational amplifier |
| Supply Voltage Range | 3.0 V to 44 V |
| Specified Single-Supply Range | 5.0 V |
| Minimum Functional Supply at 25C | 3.0 V |
| Gain-Bandwidth Product | 4.5 MHz |
| Slew Rate | 13 V/µs |
| Input Offset Voltage | 3 mV maximum |
| 工作溫度範圍 | -40C to +85C |
| Process Technology | Bipolar |
| Input Transistor Technology | Non-JFET |
| 封裝 | 8-pin SOIC |
| 安裝類型 | Surface mount |
MC34071D 8-pin soic 腳位配置指南
MC34071D（8-pin soic 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： MC34071D.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC34071D 適用於 6 應用s: Industrial Sensor Signal Conditioning, Low-Side Current Measurement, Active Audio and Communications Filtering, Process-Control Amplifier, Data-Acquisition Front End, Wide-Supply Industrial Interface.
Industrial Sensor Signal Conditioning
The MC34071D fits industrial sensor-amplifier stages that require a 4.5 MHz gain-bandwidth product and 13 V/µs slew rate while operating from a single supply. Its bipolar input stage and single-supply emphasis are useful for conditioning pressure, temperature, and position-sensor signals referenced near ground. The device is specified for single-supply performance at 5.0 V and is functional at 3.0 V at 25°C, where bandwidth, slew rate, and DC gain may change. Designers should verify the input common-mode range and output swing in the onsemi manufacturer datasheet before selecting resistor gains or protection networks.
推薦
Low-Side Current Measurement
The MC34071D can amplify the small voltage produced by a low-side current shunt in a 5.0 V or higher single-supply system. Its 3 mV maximum input offset voltage is relevant when the shunt signal is close to the amplifier's noise floor, while the 4.5 MHz gain-bandwidth product provides bandwidth for transient filtering and measurement settling. The 13 V/µs slew rate helps preserve large-signal behavior, but the shunt signal must remain inside the input common-mode range. Confirm output swing at the intended gain and temperature before applying the complete measurement range.
推薦
Active Audio and Communications Filtering
The MC34071D is appropriate for active filtering and communications signal conditioning when a moderate-to-high bandwidth and fast slew response are needed. Its 4.5 MHz gain-bandwidth product and 13 V/µs slew rate can support higher-frequency active filters than low-bandwidth precision amplifiers. The bipolar construction also avoids reliance on JFET input devices for this function. Because the device is optimized for single-supply rather than guaranteed rail-to-rail operation, the signal center point and allowable output excursion must be designed around the datasheet common-mode and swing limits.
推薦
Process-Control Amplifier
The MC34071D can serve as the amplifier in a process-control loop where rapid response and a broad supply range are more important than rail-to-rail access. Its 13 V/µs slew rate and 4.5 MHz gain-bandwidth product allow the amplifier to respond to control-loop dynamics while operating from 5.0 V or higher. A 44 V maximum supply rating provides useful headroom for industrial rails. The circuit still needs an actuator or driver stage, and designers should account for output swing, load capability, supply-current demand, and stability when closing the feedback loop.
推薦
Data-Acquisition Front End
The MC34071D is usable in the analog front end of a data-acquisition system when the source has limited bandwidth and the required signal range fits the amplifier's common-mode limits. Its 4.5 MHz gain-bandwidth product provides more bandwidth than a precision, slow-slew amplifier, while the 13 V/µs slew rate supports faster input transients. The 3 mV maximum offset specification is particularly relevant to low-level measurements, although offset and drift still contribute to total error. Use the onsemi manufacturer datasheet to establish full-temperature offset, bias-current, noise, and common-mode behavior before selecting the final gain.
推薦
Wide-Supply Industrial Interface
The MC34071D is suitable for interface electronics that must tolerate a supply range extending to 44 V while retaining a low-noise bipolar input stage. It can be used around transducers, buffered analog buses, or monitoring blocks where the internal signal is centered within the supported common-mode interval. The single-supply focus simplifies grounding compared with a dual-rail implementation, and functional operation down to 3.0 V at 25°C broadens low-voltage design options. Nevertheless, the 5.0 V point is the defined single-supply specification, so transient behavior and accuracy near 3.0 V require explicit datasheet review.
推薦
推薦產品摘要
工程參考資料，適用於 MC34071D — 比較、設計指引及合規資訊。
選型指南
Choose MC34071DG, MC34071AP, MC34071ADR2, or MC34071DR2 only after confirming the suffix-specific qualification, marking, packing, and ordering information. These candidates are from the same onsemi MC34071 family and therefore preserve the core 4.5 MHz bandwidth and 13 V/µs slew-rate characteristics. Do not select the MC34071D when the signal must operate rail-to-rail, when exact low-voltage performance at 3.0 V is critical, or when the load requires output current beyond the datasheet limit. A cross-brand substitution was not included because the supplied cross-reference results did not verify pin compatibility and parametric similarity.
與替代品比較
| 參數 | 本產品 | MC34071DG | MC34071AP | MC34071ADR2 | MC34071DR2 |
|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi |
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Gain-Bandwidth Product | 4.5 MHz | 4.5 MHz | 4.5 MHz family value | 4.5 MHz family value | 4.5 MHz family value |
| Slew Rate | 13 V/µs | 13 V/µs | 13 V/µs family value | 13 V/µs family value | 13 V/µs family value |
| Number of Amplifiers | 1 | 1 | 1 family value | 1 family value | 1 family value |
主要差異化特點
- Wide single-supply operating range (對比LM224DR)
- Fast large-signal response (對比MC34071DG)
- Bipolar input construction without JFET devices (對比MC34071AP)
設計說明
Do not treat the 3.0 V functional-operation statement as equivalent to the 5.0 V specified operating point. The onsemi manufacturer datasheet states that bandwidth, slew rate, and DC gain may change at 3.0 V and 25°C. Review the DC and AC performance curves for the actual supply voltage, temperature, and output load. Also verify the input common-mode range before using the amplifier with a sensor output close to ground.
Place the supply-bypass capacitor close to the positive and negative supply pins, and route the pin with the highest switching current directly to the capacitor ground terminal. Keep feedback resistors and the inverting-input node compact to minimize parasitic capacitance and susceptibility to noise. Although the provided extract does not specify the recommended capacitor values, use the manufacturer datasheet's typical application circuit and stability guidance for the selected gain and load.
Account for dissipation across the full 3.0 V to 44 V supply range. The operating dissipation depends on supply voltage, output voltage, load current, and the device's actual supply current, all of which must be obtained from the manufacturer datasheet before estimating junction temperature. Do not use the 44 V maximum as a default operating point; choose the lowest supply that satisfies signal-range and load-current requirements to reduce dissipation.
The 4.5 MHz gain-bandwidth product and 13 V/µs slew rate support relatively fast signals, but the usable bandwidth still depends on closed-loop gain, load capacitance, and the number of feedback poles. Check the manufacturer's stability and output-capacitance guidance before operating the amplifier as a voltage follower or driving capacitive loads. Add an isolation resistor near the output if capacitive loading is unavoidable.
合規資訊
The supplied manufacturer and distributor extracts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance must be confirmed from current onsemi documentation.