MC34071D - 44V Single-Supply Operational Amplifier | onsemi
MPN: MC34071D ✓ ActiveMC34071D Overview
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.
Drop-in alternatives for MC34071D — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MC34071DG
✅ Drop-In📋 Reference alternative (not in catalog)
MC34071AP
✅ Drop-In📋 Reference alternative (not in catalog)
MC34071ADR2
✅ Drop-In📋 Reference alternative (not in catalog)
MC34071DR2
✅ Drop-In📋 Reference alternative (not in catalog)
MC34071D Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature Range | -40C to +85C |
| Process Technology | Bipolar |
| Input Transistor Technology | Non-JFET |
| Package | 8-pin SOIC |
| Mounting Type | Surface mount |
MC34071D 8-pin soic Pin Configuration Guide
Pin configuration for MC34071D (8-pin soic package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MC34071D.
Refer to the datasheet for full pin configuration.
Typical Applications
MC34071D is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for MC34071D — comparison, design guidance, and compliance information.
Selection Guide
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.
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Wide single-supply operating range (vs LM224DR)
- Fast large-signal response (vs MC34071DG)
- Bipolar input construction without JFET devices (vs MC34071AP)
Design Notes
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.
Compliance Information
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.