L272AD2 - Dual 0.7A Power Op Amp, 16-SOIC | onsemi
料号： L272AD2 ✗ 停产L272AD2 概述
A power operational amplifier is an operational amplifier integrated with output-driver circuitry capable of supplying substantially more current than a conventional signal-level op amp. The L272AD2 belongs to the amplifier IC hierarchy that includes general-purpose operational amplifiers, power amplifiers, buffer amplifiers, and analog signal-conditioning ICs. This expanded drive capability makes it useful where a precision error amplifier must directly drive a load rather than only a high-impedance feedback network.
Key features of the L272AD2 include two amplifier circuits, output-current capability up to 0.7 A, low-impedance load support, and operation from a ±14 V or 28 V total supply. The L272A version provides tighter specifications than the original L272 according to the manufacturer description. These features distinguish the device from general-purpose packages such as LM324D and NE5534DR, which are optimized for lower current, different noise characteristics, or different drive requirements.
The device uses a high-current output stage to bridge the gap between a low-current voltage-feedback control loop and a power load. This arrangement is useful in closed-loop systems where the amplifier must respond to an error signal while directly supplying current to the controlled element. Because this L272AD2 is the A-grade derivative, design engineers should distinguish it from the original L272 when tighter electrical limits are required, but should still verify the complete ordering code and electrical limits against the applicable Fairchild Semiconductor datasheet.
Typical uses include servo-amplifier output stages, power-supply control loops, audio power stages, compact-disc and VCR analog signal paths, motor or actuator drivers, and general low-impedance load control. The split-supply capability is useful in bipolar output systems, while the ground-compatible input arrangement supports systems in which the input signal references the midpoint between positive and negative rails.
Designs must account for the relatively high power dissipated by the output stage when driving low-impedance loads. Output current should not be treated as a constant-current capability independent of supply voltage, load resistance, and thermal conditions. The 16-SOIC package also requires a sound copper and thermal strategy because sustained output operation can heat the package even when the amplifier is mounted on a conventional PCB.
This product page consolidates the verified L272AD2 identity, package, supply, channel-count, and output-current information with application guidance, comparison parameters, and design cautions. It also identifies where detailed limits, pin functions, pricing, and lifecycle details remain unavailable in the supplied source data instead of presenting unverified figures as engineering specifications.
直接替换替代料： L272AD2 ——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： L272AD2 （相同外形与封装尺寸） ——差异在于 Package.
L272D013TR
✅ 直接替换📋 参考替代料（不在目录中）
L272AD2 最大额定值与电气特性
| Product Type | Dual high-power operational amplifier |
| Amplifier Channel Count | 2 circuits |
| Output Current Capability | Up to 0.7 A |
| 电源电压 | ±14 V / 28 V total |
| Power Supply Type | Split dual supply |
| Load Compatibility | Low-impedance loads |
| 封装 | 16-pin SOP (16-SOIC) |
| 安装类型 | Surface mount |
| Product Classification | Standard general-purpose amplifier |
L272AD2 16-pin sop (16-soic) 引脚配置指南
L272AD2（16-pin sop (16-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： L272AD2.
请参阅 数据手册 以查看完整引脚配置。
典型应用
L272AD2 适用于 6 应用s: Servo Amplifier Output Stage, Power-Supply Control Loop, Audio Power Amplification, Motor and Actuator Driver, Industrial Analog Control Board, Compact-D and Legacy Video Signal Path.
Servo Amplifier Output Stage
The L272AD2 fits closed-loop servo-amplifier output stages because each channel can deliver output current up to 0.7 A into a low-impedance load. According to the manufacturer description, the L272 family is intended for servo amplifiers, and the L272A grade offers tighter specifications than the original L272. The amplifier can close the loop around a motor or actuator while supplying substantially more current than a conventional signal-level op amp. Design work should include compensation for the selected motor and load, protection against sustained near-short conditions, and PCB copper arranged to remove output-stage heat. The 16-SOIC package makes the device practical for compact analog-control boards, but thermal performance and loop stability must be confirmed in the final circuit.
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Power-Supply Control Loop
The L272AD2 is suitable for the high-current output section of a power-supply feedback loop because the manufacturer identifies power supplies as a target application for the L272 family. Its verified capability to provide up to 0.7 A into low-impedance loads allows a control amplifier to drive a power device or load more directly than a standard dual op amp. The ±14 V, or 28 V total, supply capability fits split-supply power-control circuitry. When applying it this way, verify compensation around the complete power stage, control loop crossover, load transient response, and thermal rise. The L272A version's tighter specifications are valuable when consistent behavior across operating conditions is more important than minimum component cost.
推荐
Audio Power Amplification
The L272AD2 can serve as a high-current driver or power-amplifier element in audio equipment where the load requires more drive than a conventional small-signal amplifier can provide. Its two independent channels support dual-mono or stereo configurations, while the 0.7 A output-current capability and low-impedance-load orientation are the principal reasons to select it over a standard dual op amp. According to the verified manufacturer description, the L272 family also has application history in compact-disc and VCR signal paths. Audio implementation must account for output-stage dissipation, load impedance, frequency response, distortion limits, and stability with reactive speaker cables. Those detailed electrical parameters are not present in the supplied snippets and must be obtained from the manufacturer datasheet before release.
推荐
Motor and Actuator Driver
The L272AD2 is applicable to motor and actuator drive assistance because its verified output-current capability reaches 0.7 A and it is designed for low-impedance loads. The dual-channel structure allows separate drive functions or a differential output arrangement, subject to the exact pin configuration and common-mode limits in the datasheet. In a motor-control system, the amplifier can operate inside a feedback loop or as a power-buffer element for a control signal. Practical implementation requires protection against motor-generated back-EMF, current limiting, stable compensation, and careful heat spreading on the 16-SOIC footprint. The L272A grade's tighter specifications may improve consistency, but continuous-current and thermal claims should be established from the complete Fairchild Semiconductor document.
推荐
Industrial Analog Control Board
The L272AD2 is well matched to industrial analog-control boards that combine low-level sensing with a relatively low-impedance actuator or test load. Its verified 16-SOIC package is surface mountable, and the two channels can implement independent control paths within one device. The L272 family's split-supply operation and ground-compatible input description align with bipolar industrial control systems where signals are referenced to the midpoint of positive and negative rails. Unlike a general-purpose dual amplifier, the L272AD2 has a power-oriented output stage capable of 0.7 A. Engineers should still verify industrial temperature requirements, isolation boundaries, component tolerances, and EMI conditions. The relatively high output dissipation means that PCB copper and enclosure temperature deserve review alongside loop-stability testing.
推荐
Compact-D and Legacy Video Signal Path
The L272AD2 can be considered for compact-disc, VCR, and related legacy analog signal paths because the verified manufacturer description explicitly lists those applications for the L272 family. The dual amplifier provides two channels in one 16-SOIC package, while its low-impedance output capability can reduce the need for a separate output-buffer stage. In a practical signal-path implementation, one channel may provide drive or buffering while the other handles another analog function, depending on the verified pinout. The L272A grade offers tighter specifications than the original L272, potentially improving channel consistency in precision analog designs. Before adoption, compare noise, bandwidth, slew rate, output impedance, and distortion against the complete signal chain, and validate operation with the source impedance and intended cable or load.
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推荐产品汇总
工程参考数据： L272AD2 ——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 | L272D013TR |
|---|---|---|
| Brand | onsemi / Fairchild Semiconductor | onsemi / Fairchild Semiconductor |
| Package | 16-SOP | 16-SOP |
| Product Family | L272A | L272 |
| Amplifier Configuration | Dual | Dual |
| Output Current | Up to 0.7 A | Up to 0.7 A |
| Supply Voltage | ±14 V / 28 V total | ±14 V / 28 V total |
| Load Type | Low-impedance loads | Low-impedance loads |
| Specification Grade | L272A with tighter specifications | Original L272 family |
| Amplifier Classification | General-purpose power operational amplifier | General-purpose power operational amplifier |
关键差异点
- Higher-grade A-version electrical specifications （对比 L272D013TR)
- Direct low-impedance drive capability （对比 L272D013TR)
- Dual-channel integration in a surface-mount package （对比 L272D013TR)
设计说明
Do not assume that the 0.7 A output-current figure permits continuous 0.7 A operation in every package and load condition. Estimated: with a 14 V single-side supply span and a 4 ohm load, the theoretical load current is 3.5 A, which already exceeds the verified output capability; at the 0.7 A limit, output dissipation is approximately 1.96 W before accounting for other circuit losses. Use the manufacturer's SOA, output-current derating, and thermal-resistance data before sizing PCB copper or defining continuous-load ratings.
The L272AD2 is intended for split-supply operation, with the verified operating point stated as ±14 V or 28 V total. Decouple each supply rail close to the corresponding package pins and place the decoupling capacitor return directly into the device ground reference. Avoid sharing narrow return paths between the power output stage and sensitive feedback components. Confirm absolute maximum voltage, quiescent current, output saturation voltage, and power-up behavior in the manufacturer datasheet before selecting bulk capacitance or protection components.
Do not substitute a standard dual op amp solely because both devices have two channels. The L272AD2's verified advantage is its power output stage, while the L272D013TR relationship and any suffix-based ordering variants require datasheet confirmation. Before replacement, compare package drawing, pin numbers, supply pins, input common-mode range, output stability, output-current limits, thermal limits, and feedback compensation. A functional similarity is not proof of pin-to-pin compatibility, particularly for devices capable of handling low-impedance loads.
合规信息
The supplied verified sources do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for the L272AD2. AEC-Q100 is marked not applicable because this listing does not identify the device as an automotive-qualified product.
