MC33171P - 3-44V Low-Power Op Amp | onsemi | 8-PDIP
料号： MC33171P ✓ 量产中MC33171P 概述
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs. The MC33171 belongs to the operational-amplifier hierarchy within analog and mixed-signal semiconductors. It can operate from a single supply or split supplies, allowing it to serve as a general-purpose amplifier, buffer, comparator, or active-filter building block in industrial, instrumentation, and control circuits.
Key characteristics include the wide 3.0 V to 44 V operating range, 180 uA current consumption per amplifier, 1.8 MHz gain-bandwidth product, and 2.1 V/us slew rate. These values position the device for low-power, moderate-bandwidth signal conditioning where a larger package is acceptable and through-hole assembly is preferred. The 8-PDIP format also simplifies prototyping, breadboarding, repair, and manual production processes.
The bipolar fabrication approach provides the stated bandwidth and slew-rate performance without JFET-device technology. Because the operating supply extends to 44 V, the amplifier can accommodate higher-voltage systems than conventional low-voltage operational amplifiers. Designers must still verify input and output common-mode limits against the selected supply configuration before using the amplifier outside its intended operating region.
Typical uses include low-frequency sensor conditioning, buffered transducer interfaces, audio preamplification, industrial control signals, power-supply feedback monitoring, and active analog filters. The 1.8 MHz gain-bandwidth product is suitable for many audio and instrumentation stages, while the 2.1 V/us slew rate supports reasonably clean responses to moderate-amplitude step inputs.
When designing a board around the MC33171P, maintain adequate input and output voltage headroom, bypass the supply pins close to the device, and route high-impedance input signals with minimal leakage and contamination. Stable operation also depends on the feedback network, source impedance, output loading, and application-specific settling requirements.
This product page combines the manufacturer's MC33171 family documentation, distributor package information, search-focused technical data, and practical design guidance. It also distinguishes verified drop-in alternatives from broader equivalents that may require different packages, supply ranges, or performance checks before substitution.
直接替换替代料： MC33171P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC33171PG
✅ 直接替换📋 参考替代料（不在目录中）
MC33171P 最大额定值与电气特性
| Amplifier Type | Single general-purpose operational amplifier |
| Number of Circuits | 1 circuit |
| Supply Voltage Range | 3.0 V to 44 V |
| Operating Current | 180 uA per amplifier |
| Gain-Bandwidth Product | 1.8 MHz |
| Slew Rate | 2.1 V/us |
| Input Transistor Technology | Bipolar |
| Supply Configuration | Single supply or split supply |
| 封装 | 8-PDIP |
| 引脚数量 | 8 pins |
| 安装方式 | Through-hole |
MC33171P 引脚配置
| 引脚 1 | OFFSET NULL — Offset-voltage null adjustment connection |
| 引脚 2 | IN- — Inverting input |
| 引脚 3 | IN+ — Non-inverting input |
| 引脚 4 | V- — Negative supply or ground in single-supply operation |
| 引脚 5 | OFFSET NULL — Offset-voltage null adjustment connection |
| 引脚 6 | OUTPUT — Amplifier output |
| 引脚 7 | V+ — Positive supply input |
| 引脚 8 | NC — No connection |
典型应用
MC33171P 适用于 6 应用s: Industrial Sensor Signal Conditioning, Audio Preamplification and Buffering, Power-Supply Feedback Monitoring, Active Filters and Analog Control Loops, Data Acquisition Front Ends, Battery-Powered Instrumentation.
Industrial Sensor Signal Conditioning
The MC33171P is suitable for conditioning low-frequency sensor signals where a 3.0 V to 44 V supply range and 180 uA operating current per amplifier are useful. Place the amplifier in a non-inverting or differential input stage, then use a stable feedback network to establish gain. Its 1.8 MHz gain-bandwidth product provides ample bandwidth for many temperature, position, and pressure sensors, while the 2.1 V/us slew rate supports moderate signal transitions. Verify that sensor output levels remain inside the input common-mode range for the chosen supply.
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Audio Preamplification and Buffering
The MC33171P can provide inexpensive low-level audio amplification or impedance buffering because it offers a 1.8 MHz gain-bandwidth product and 2.1 V/us slew rate. Its 180 uA operating current per amplifier also suits battery-operated audio products. The device is particularly appropriate for microphone preamplifier, line-level buffer, and tone-shaping stages that do not require rail-to-rail inputs. Select external coupling capacitors for single-supply operation and confirm that the resulting bias point lies within the amplifier's common-mode limits.
推荐
Power-Supply Feedback Monitoring
The MC33171P is useful for monitoring and buffering feedback nodes in higher-voltage power-control systems because its supply capability extends to 44 V. It can amplify a scaled feedback voltage for comparison against a reference while consuming only 180 uA per amplifier. This makes it appropriate for low-duty-cycle supervisory circuits, supply sequencing, and fault-detection loops. The signal and supply transients must remain within absolute maximum and common-mode ratings, and series resistance or filtering may be needed to reject switching-node coupling.
推荐
Active Filters and Analog Control Loops
The MC33171P can implement first-order active filters, integrators, and error amplifiers where moderate bandwidth and low power are more important than precision or rail-to-rail operation. Its 1.8 MHz gain-bandwidth product allows useful closed-loop bandwidth at practical gains, while the 2.1 V/us slew rate helps preserve low distortion for control signals. Choose resistor and capacitor values to keep the closed-loop response stable, and evaluate component tolerances against the required filter accuracy. The bipolar input stage should also be checked for bias-current-induced offsets.
推荐
Data Acquisition Front Ends
The MC33171P is suitable for buffering slow or moderate-bandwidth inputs ahead of analog-to-digital conversion. Its 1.8 MHz gain-bandwidth product handles common sensor and instrumentation signals, and the 180 uA per-amplifier current supports compact, low-power acquisition systems. Place the amplifier close to the ADC input to reduce noise pickup and provide source impedance suitable for the converter's sample-and-hold input. Verify input bias-current requirements, output settling, and common-mode limits against the selected ADC and operating voltage.
推荐
Battery-Powered Instrumentation
The MC33171P supports low-power instrumentation because the manufacturer specifies 180 uA operating current per amplifier. It can amplify sensor outputs, interface with transducers, or provide active filtering in portable measurement equipment that operates from a single low-voltage source. The 3.0 V minimum supply is compatible with common single-cell power systems, while the wide upper rating adds flexibility for boosted supplies. Designers should confirm the actual quiescent-current change over temperature and use the low-current operating point specified in the manufacturer datasheet for battery-life estimates.
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推荐产品汇总
工程参考数据： MC33171P ——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 | MC33171PG |
|---|---|---|
| Brand | onsemi | onsemi |
| Package | 8-PDIP | 8-PDIP - same package |
| Supply Voltage Range | 3.0 V to 44 V | 3.0 V to 44 V |
| Operating Current | 180 uA per amplifier | 180 uA per amplifier |
| Gain-Bandwidth Product | 1.8 MHz | 1.8 MHz |
| Slew Rate | 2.1 V/us | 2.1 V/us |
| Input Transistor Technology | Bipolar | Bipolar |
| Number of Circuits | 1 circuit | 1 circuit |
关键差异点
- Wide single-supply operating range （对比 MC33171PG)
- Low operating current （对比 MC33171PG)
- Identical core dynamic performance （对比 MC33171PG)
- Bipolar general-purpose signal path （对比 MC33171PG)
设计说明
The manufacturer specifies 180 uA operating current per amplifier. When calculating battery life, include the quiescent current, load current, and the current associated with external bias and feedback networks. In a single-supply circuit, keep the negative supply connection at ground unless the application explicitly requires split-supply operation. Add supply bypassing close to pins 4 and 7; use short ground-return paths to reduce supply noise from appearing at the output.
Route the 8-PDIP footprint according to the manufacturer package drawing and verify whether the two offset-null pins are left open or fitted with a trimmer. Place input components close to pins 2 and 3 and keep the feedback loop compact around pins 2 and 6. For high-impedance sources, minimize leakage paths around the input pins, use protective bias resistors when required, and avoid routing the inputs beside switching nodes or long copper surfaces.
Do not infer rail-to-rail input or output behavior from the 3.0 V to 44 V supply rating. Before biasing a single-supply circuit, check the input common-mode range and output swing against the actual signal amplitude. Likewise, verify that source current, output current, input bias current, and absolute maximum voltages meet the datasheet limits. The broad supply capability is useful, but it does not remove normal analog operating constraints.
The 1.8 MHz gain-bandwidth product and 2.1 V/us slew rate make the MC33171P suitable for many low-frequency and audio stages, but closed-loop stability still depends on noise gain and feedback topology. Keep feedback components close to the device, avoid excessive capacitive loading on the output, and provide an isolation resistor if driving a cable or capacitive input. Use the manufacturer test conditions to establish the expected settling behavior before relying on the device for waveform accuracy.
合规信息
The manufacturer MC33171 family document identifies MC33171, MC33172, MC33174, NCV33172, and NCV33174 variants. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for the MC33171P ordering suffix was identified, so these fields remain unknown.
