MC34071P - 3-44V Single Operational Amplifier | onsemi | 8-DIP
MPN： MC34071P ✓ 啟用中MC34071P 概覽
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to compare an inverting input with a non-inverting input. The MC34071P provides one amplifier circuit in an 8-DIP package, placing it within the hierarchy of operational amplifier, analog amplifier, and integrated circuit. Its single-supply capability simplifies circuits that operate from batteries, industrial control rails, test equipment, and other systems that do not provide a centered or negative supply.
The MC34071P is associated with a 5 mV input offset voltage specification in distributor listings and uses quality bipolar fabrication in the onsemi MC33071, MC34071, and related family. The family includes dual and quad versions for designs that require multiple amplifier channels, but channel count and package differ when comparing those family members with the single MC34071P. The 8-DIP package is a through-hole package with a nominal 0.300-inch, 7.62 mm lead pitch, making it suitable for conventional PCB layouts and prototype boards.
Typical uses include sensor signal conditioning, low-frequency active filtering, industrial instrumentation, audio and communications support circuits, and general voltage amplification. Because the amplifier can operate from a single supply, the input and output signal ranges must be checked against the supply rails. Designers should also account for input common-mode limits, output swing, bias-current effects, noise, stability, and the power dissipation produced by the selected supply voltage and load.
The MC34071P is most appropriate when a through-hole single op amp is preferred and the design needs wide single-supply headroom. Its counterpart MC34071APG is the most directly identified cross-reference candidate in the available information. Before substituting any part, confirm the complete pinout, electrical limits, common-mode behavior, output swing, and stability requirements against the target circuit.
This page consolidates the verified onsemi datasheet information, distributor package identification, and cross-reference findings into a practical component record. The key engineering distinction is not simply the 3.0 V to 44 V supply capability, but the combination of a single amplifier, bipolar implementation, through-hole 8-DIP construction, and the need to design the signal path around single-supply input and output limits.
直接替換替代品，適用於 MC34071P — 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： MC34071P （相同外形與佔位） — 差異在於 Input Offset Voltage, Mounting Type, Package.
MC34071APG
✅ 直接替換📋 參考替代品（不在目錄中）
MC34071P 最大額定值與電氣特性
| Product Type | Single operational amplifier |
| Number of Amplifier Circuits | 1 circuit |
| Supply Voltage Range | 3.0 V to 44 V |
| Nominal Single-Supply Specification | 5.0 V |
| Low-Voltage Functional Limit | 3.0 V at 25°C |
| Input Offset Voltage | 5 mV |
| Technology | Bipolar fabrication |
| 封裝 | 8-DIP (0.300 inch, 7.62 mm pitch) |
| 安裝類型 | Through hole |
| Channel Type | Single-ended |
| Application Classification | General-purpose amplifier |
MC34071P 腳位配置
| 腳位 1 | NC — Not connected (per datasheet) |
| 腳位 2 | -INPUT — Inverting input |
| 腳位 3 | +INPUT — Non-inverting input |
| 腳位 4 | V- — Negative supply connection |
| 腳位 5 | OFFSET NULL — Offset-null connection |
| 腳位 6 | OUTPUT — Amplifier output |
| 腳位 7 | V+ — Positive supply connection |
| 腳位 8 | NC — Not connected (per datasheet) |
典型應用
MC34071P 適用於 6 應用s: Industrial Sensor Signal Conditioning, Low-Frequency Active Filter, Precision Buffering Stage, Battery-Powered Instrumentation, Process-Control Analog Interface, Test and Measurement Front Panel.
Industrial Sensor Signal Conditioning
MC34071P fits sensor-amplifier front ends that operate from a single industrial supply and need a wider supply range than a conventional low-voltage rail-to-rail op amp. Its single-ended 8-DIP package is practical for control boards with through-hole assembly. The design must keep sensor signals inside the input common-mode range and keep the output within the specified swing. At 5.0 V, use the manufacturer's nominal single-supply performance; near 3.0 V, bandwidth, slew rate, and DC gain may change. Place a local bypass capacitor near the supply pin and verify sensor grounding to prevent injected noise from becoming signal error.
推薦
Low-Frequency Active Filter
MC34071P can implement first-order and simple second-order active-filter stages when the signal bandwidth remains below the amplifier's closed-loop bandwidth and the required output amplitude stays within the swing limits. The wide 3.0 V to 44 V single-supply range supports operation from compact battery-powered test products to higher-voltage control systems. Because the MC34071P is not characterized here as a rail-to-rail input and output device, the resistor network should not assume full rail operation. Validate gain error, phase margin, and output loading with the target filter response.
推薦
Precision Buffering Stage
MC34071P is suitable for buffering sensor outputs or reference nodes when the source impedance and output load are compatible with the amplifier's input-bias and drive capability. A voltage follower preserves signal amplitude while providing higher source impedance and isolation between measurement and downstream circuitry. The 5 mV listed input offset specification should be included in the accuracy budget, especially for low-level signals. A unity-gain configuration also requires confirmation of stability, output swing, and capacitive-load behavior in the target operating range.
推薦
Battery-Powered Instrumentation
The 3.0 V functional capability makes MC34071P relevant to portable instrumentation operating from a single battery-derived rail. The manufacturer defines full single-supply specifications at 5.0 V, so a design that must run continuously at 3.0 V should account for the documented changes in bandwidth, slew rate, and DC gain. Keep the signal amplitude within the usable input and output ranges rather than assuming rail-to-rail behavior. Low supply voltage also makes input offset and bias-current errors more significant relative to a small sensor output.
推薦
Process-Control Analog Interface
MC34071P can amplify and buffer low-frequency process signals in industrial control boards where a single positive supply simplifies the analog architecture. Its 44 V maximum supply capability can accommodate higher-voltage industrial rails, subject to package dissipation and operating-temperature limits. The amplifier should be configured so sensor signals remain inside the common-mode input range and actuator interfaces remain inside the output swing range. Add supply bypassing close to the device and use a single-point grounding strategy to reduce ground-potential error across the control loop.
推薦
Test and Measurement Front Panel
MC34071P can form the analog gain or buffer section of a bench instrument powered from a single low-voltage rail. The device's single-supply architecture is convenient when the instrument does not generate a negative rail, while the through-hole 8-DIP package supports repairable and prototype-heavy layouts. For low-level measurement channels, include the 5 mV listed offset voltage and input bias effects in the error budget. Confirm settling behavior and output drive for the source impedance and cable capacitance expected in the finished instrument.
推薦
推薦產品摘要
工程參考資料，適用於 MC34071P — 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 | MC34071APG |
|---|---|---|
| Package | 8-DIP | 8-DIP |
| Brand | onsemi | onsemi |
| Product Type | Single operational amplifier | Single operational amplifier |
| Amplifier Circuit Count | 1 circuit | 1 circuit |
| Technology | Bipolar fabrication | Bipolar fabrication |
| Mounting Type | Through hole | Through hole |
主要差異化特點
- Wide single-supply operating range (對比MC34071APG)
- Single-amplifier 8-DIP configuration (對比MC34071APG)
- Documented lower-voltage behavior guidance (對比MC34071APG)
設計說明
Design the power path for the actual single-supply voltage, not only the minimum operating voltage. The MC34071P datasheet defines the single-supply specifications at 5.0 V, while operation down to 3.0 V is specified at 25°C with possible changes in bandwidth, slew rate, and DC gain. Confirm the supply range, quiescent current, load current, and maximum operating temperature. For a high-voltage 44 V design, calculate package dissipation and provide adequate copper area and airflow.
Place the input, output, and bypass components close to the IC and keep the supply return path compact. Use a local bypass capacitor from the positive supply pin to the supply ground connection, and route feedback components away from input and output traces where practical. Since MC34071P uses a single supply, connect the negative supply pin to the circuit ground unless the application explicitly uses a bipolar supply. Confirm the physical 8-DIP footprint and pin numbering against the manufacturer pin description before layout release.
Do not assume rail-to-rail input or output behavior for the MC34071P. Check the valid input common-mode range and output voltage swing at the selected supply voltage, especially in battery-powered 3.0 V operation. Include the 5 mV listed input offset voltage in the accuracy budget for low-level signals, and avoid operating the output near its swing limit with high capacitive loads. If the replacement candidate MC34071APG is considered, repeat these checks rather than assuming identical behavior.
For low-frequency instrumentation, keep the inverting-input node physically compact and minimize parasitic capacitance around high-impedance inputs. Input bias current can create offset error when source impedance is high, so use balanced feedback resistors or lower source impedance where practical. For higher-frequency use, verify the closed-loop bandwidth and slew rate against the required signal amplitude and load. A small-signal response alone is not sufficient for a large-amplitude step or slew-rate-limited application.
合規資訊
The verified manufacturer and distributor information does not provide explicit compliance declarations for the MC34071P ordering code. AEC-Q100 qualification is not identified for this general-purpose amplifier.
