L272D2 - 0.7A Dual Power Operational Amplifier | onsemi
料号： L272D2 ✓ 量产中L272D2 概述
An operational amplifier is an active analog signal-conditioning device that uses high-gain differential amplification to increase the voltage difference between its two inputs. A dual operational amplifier contains two amplifier channels in one package, reducing board area compared with two discrete single-channel devices. A power operational amplifier extends this role toward low-impedance loads, motor-control interfaces, audio output stages, and other applications requiring more output current than a conventional small-signal op amp can provide.
The L272D2 provides output current up to 0.7 A and accepts a minimum supply voltage of 4 V. Its input stage supports ground-compatible operation and both common-mode and differential-mode input ranges. The available family documentation also identifies low saturation voltage, thermal shutdown, and operation suitable for low-impedance loads as major features. The 16-pin SOIC package provides a compact surface-mount implementation for dual-channel analog designs.
The L272 family is designed to combine the familiar function of a general-purpose dual op amp with substantially greater output-current capability. Ground-compatible inputs simplify designs that accept signals referenced to the analog ground plane, while thermal shutdown provides a defined protection mechanism during excessive power dissipation. Exact input-offset, input-bias-current, slew-rate, gain-bandwidth, and saturation-voltage values are not available in the supplied excerpts and should be taken from the manufacturer datasheet before final design approval.
Typical uses include low-impedance audio and signal drivers, motor or actuator interfaces, power buffers, industrial control modules, and two-channel analog front ends. In each case, the amplifier operates as a closed-loop circuit, and stability depends on the feedback network, load characteristics, supply bypassing, and output-current demand. The dual arrangement is useful when two related channels can share the same supply and ground system while retaining independent amplifier inputs and outputs.
Designers should verify total supply voltage, input and output swing, load impedance, output-current waveform, thermal rise, and stability under the intended loading. Decoupling capacitors should be placed close to the supply pins, and exposed copper should be used to improve heat dissipation. The 0.7 A output rating describes a device intended for power-drive duties, but continuous-current capability still depends on package dissipation, ambient temperature, and PCB thermal resistance.
This page consolidates the verified L272D2 device description, distributor records, family comparison information, and practical selection guidance. It also distinguishes verified characteristics from unavailable parameters, helping engineers evaluate this dual power operational amplifier without assuming unverified electrical limits or compatibility.
直接替换替代料： L272D2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L272D2 （相同外形与封装尺寸） ——差异在于 Package.
L272D2 最大额定值与电气特性
| Amplifier Type | High-power dual operational amplifier |
| Number of Channels | 2 channels |
| 最大输出电流 | 0.7 A |
| Minimum Supply Voltage | 4 V |
| Maximum Total Supply Voltage | 28 V (±14 V) |
| Thermal Shutdown Temperature | 160 °C |
| Input Type | Ground-compatible differential inputs |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
L272D2 16-pin soic 引脚配置指南
L272D2（16-pin soic 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： L272D2.
请参阅 数据手册 以查看完整引脚配置。
典型应用
L272D2 适用于 6 应用s: Low-Impedance Audio Driver, Motor and Actuator Signal Interface, Industrial Control Signal Buffer, Power Buffer and Level Shifter, Test and Measurement Output Stage, Ground-Referenced Dual Signal Conditioning.
Low-Impedance Audio Driver
The L272D2 fits low-impedance audio drive requirements because its verified output-current capability reaches 0.7 A while each channel retains the familiar closed-loop behavior of an operational amplifier. It can be placed in an inverting or non-inverting amplifier stage, with feedback resistors setting the closed-loop gain. The 16-SOIC package keeps a dual-channel implementation compact, while the 4 V minimum supply supports lower-voltage systems. Designers must verify output swing, slew rate, gain-bandwidth product, thermal dissipation, and loop stability against the speaker or line input because those values are not available in the supplied excerpts.
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Motor and Actuator Signal Interface
The L272D2 can serve as the voltage-drive interface between a control signal and a low-impedance motor or actuator input because its verified output current is rated up to 0.7 A. In a typical implementation, one channel follows a control waveform while the other provides monitoring, buffering, or a complementary signal. The minimum operating supply is 4 V, but continuous actuator current, inductive energy, and thermal conditions require separate analysis. Add suitable flyback protection for inductive loads and confirm the actual output-current derating, saturation behavior, and stability in the manufacturer datasheet.
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Industrial Control Signal Buffer
The L272D2 is appropriate for industrial control modules that must buffer a sensor or controller output into a low-impedance plant interface. Its dual-channel arrangement allows one amplifier to drive a control signal and the other to condition a feedback or reference signal, while the 16-SOIC package limits board footprint. The verified 0.7 A output-current capability provides more drive than a conventional signal op amp, but it also demands careful supply bypassing and copper-area planning. Verify industrial temperature rating, input common-mode range, output swing, noise, and transient performance before industrial deployment.
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Power Buffer and Level Shifter
The L272D2 can be used as a power buffer between a high-impedance source and a lower-impedance downstream circuit. Its verified output current of up to 0.7 A helps preserve signal amplitude where a general-purpose dual amplifier would be limited by drive capability, and the 4 V minimum supply supports compact low-voltage systems. Configuring the device as a voltage follower minimizes closed-loop gain while using its current capability. Confirm follower stability with the intended capacitive load, verify output swing at the selected load, and review thermal rise at sustained output current.
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Test and Measurement Output Stage
The L272D2 can provide a buffered output stage for test and measurement equipment that must drive low-impedance inputs while preserving a control-system reference signal. Its two channels can be allocated to complementary or differential outputs, and the 0.7 A drive rating offers margin over small-signal operational amplifiers. The minimum 4 V supply requirement allows operation from compact test fixtures, although actual usable output range depends on load and supply voltage. Before using the amplifier with external instruments, verify output-current limits, output impedance, small-signal bandwidth, slew rate, and whether the selected load introduces instability.
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Ground-Referenced Dual Signal Conditioning
The L272D2 supports ground-referenced dual signal-conditioning paths because the verified family information identifies ground-compatible inputs and both common-mode and differential-mode input ranges. The device can amplify, invert, attenuate, or buffer two related analog channels while providing substantially more output drive than a conventional dual op amp. Its 16-SOIC package simplifies PCB integration, but exact input-range limits must be checked because the supplied excerpts do not provide their numerical boundaries. Keep the feedback network close to the relevant pins, decouple the supply locally, and confirm that output swing leaves sufficient margin for the signal.
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推荐产品汇总
工程参考数据： L272D2 ——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 | L272AD2 |
|---|---|---|
| Brand | onsemi | onsemi |
| Package | 16-pin SOIC | 16-pin SOIC |
| Amplifier Configuration | Dual operational amplifier | Dual operational amplifier |
| Maximum Output Current | 0.7 A | 0.7 A |
| Minimum Supply Voltage | 4 V | 4 V |
| Maximum Total Supply Voltage | 28 V (±14 V) | 28 V (±14 V) |
| Input Compatibility | Ground-compatible inputs | Ground-compatible inputs |
关键差异点
- Substantial output-drive capability in a dual amplifier （对比 L272AD2)
- Lower minimum supply voltage for the dual power-amplifier family （对比 L272AD2)
- Broader tolerance for applications that do not require the tighter precision variant （对比 L272AD2)
设计说明
Treat the 0.7 A output rating as a device capability rather than an unrestricted continuous-load target. Estimated: at a 12 V total supply, 6 V output, and 0.5 A output current, ideal amplifier dissipation is approximately 3 W before accounting for quiescent current and output-stage losses. Provide copper around the SOIC power pins, minimize thermal bottlenecks, and compare the resulting junction-temperature estimate with the manufacturer limit before applying sustained high current.
Place the supply-decoupling network directly between the relevant power and ground pins, with a short return path that avoids high-current output-current loops. Keep the two amplifier feedback networks close to their associated inputs and outputs, and route high-current output paths away from sensitive input traces. Because the verified excerpts do not specify the pin numbers or exposed-pad arrangement, confirm the package drawing and pinout in the manufacturer datasheet before final routing.
Do not infer generic dual-op-amp behavior from this power-capable device without checking the L272D2 datasheet. The verified information establishes a 4 V minimum supply, up to 0.7 A output current, ground-compatible inputs, and 160 °C thermal shutdown, but it does not provide gain-bandwidth product, slew rate, input-range limits, output swing, or exact thermal derating. Confirm those values and the complete 16-pin pinout before schematic release or substitution.
Use separate high-current and high-impedance grounding paths where practical. Feedback components should connect to the amplifier pins rather than through shared narrow copper routes, which can introduce resistance, inductance, and coupling between channels. Check the selected output network for capacitive loading because the supplied records do not establish the exact gain-bandwidth product or stability profile. A scope measurement of step response and ringing under the real load is advisable before production release.
合规信息
The supplied product excerpts do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields remain unknown rather than being inferred from the manufacturer or package.