L272AM - 0.7A Dual Power Op Amp in 8-DIP | onsemi
MPN： L272AM ✓ 啟用中L272AM 概覽
An operational amplifier, or op amp, is a voltage-feedback analog amplifier that uses differential input voltage to control an output. A power operational amplifier extends this familiar function into higher-current applications. In the product hierarchy, L272AM belongs to the operational-amplifier family, amplifier IC category, and broader analog and mixed-signal semiconductor market. Unlike a general-purpose precision op amp, its defining capability is output-current capability of up to 0.7 A for low-impedance loads.
The L272AM combines a dual-amplifier configuration with high output-current capability in a through-hole 8-DIP package. Two independent amplifiers in one package can reduce component count in designs requiring paired signal paths. The specified 0.7 A output-current capability is the principal feature for motor-driver, audio-output, and other power-buffer applications. The L272A tightening in input bias current, input offset voltage, and input offset current supports applications requiring more accurate input-stage behavior than the original L272.
The L272AM is intended for low-impedance drive scenarios, where the load draws substantial current or presents a low resistance to ground. Its output stage, rather than merely its small-signal voltage gain, is the central engineering consideration. Designers must account for output-current dissipation, load-return paths, thermal rise, and stability under capacitive or inductive loading. Because the available source material does not provide complete electrical tables, supply limits, gain-bandwidth data, slew rate, or output-saturation values, those parameters should be confirmed in the manufacturer datasheet before release.
Typical uses include low-impedance audio amplification, motor and actuator drive interfaces, power-buffer stages, and industrial control or instrumentation circuits that require more output current than a conventional dual op amp can provide. Using both channels can also simplify symmetrical signal conditioning or complementary drive designs. The through-hole DIP package is particularly suitable for leaded assemblies, prototypes, repair products, and industrial equipment where insertion and inspection are more important than board area.
For reliable implementation, calculate worst-case output-stage dissipation from the selected supply voltage, output swing, load current, and ambient temperature. Keep output-return current paths short and use a ground plane that can carry the load current without introducing voltage drops. Decouple the supply pins near the device and verify stability with the actual load network. Remote feedback or ground connections should be treated as critical layout elements because high-current outputs combined with imperfect return paths can create feedback errors, oscillation, or unexpected supply transients.
This page consolidates the verified onsemi and distributor descriptions, current sourcing links, package information, and practical engineering guidance for the L272AM. It also distinguishes documented facts from missing datasheet parameters and avoids presenting unverified replacement parts as drop-in choices. Engineers can use the comparison and design notes to assess whether the dual high-current output capability suits their load before finalizing the schematic, thermal design, and component sourcing plan.
直接替換替代品，適用於 L272AM — 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。
L272M
✅ 直接替換📋 參考替代品（不在目錄中）
L272AM 最大額定值與電氣特性
| Product Type | Dual high-power operational amplifier |
| Amplifier Channel Count | 2 channels |
| 最大輸出電流 | 0.7 A |
| 封裝 | 8-DIP through-hole package |
| Manufacturer | onsemi |
| Supported Load Type | Low-impedance loads |
| Series | L272A |
L272AM 8-dip through-hole package 腳位配置指南
L272AM（8-dip through-hole package 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： L272AM.
請參閱 資料表 以查看完整腳位配置。
典型應用
L272AM 適用於 6 應用s: Low-Impedance Audio Output, Motor and Actuator Drive Interface, Power Buffer Stage, Industrial Instrumentation Output, Audio Amplifier Driver, Repair and Legacy Equipment.
Low-Impedance Audio Output
The L272AM is suitable for a low-impedance audio output stage because each dual amplifier channel can deliver output current up to 0.7 A. Unlike a conventional small-signal dual op amp, the device is explicitly designed to drive heavier loads, allowing the output stage to operate closer to the capabilities of the available power-supply rails. In a practical implementation, the amplifier output is routed with short, low-resistance conductors to the load, while its supply and ground returns use sufficiently wide copper paths to minimize voltage loss. The L272A version is the preferred member of the family when tighter input offset voltage, input bias current, and input offset current specifications are important. Before finalizing the stage, verify output swing, slew rate, bandwidth, thermal dissipation, and stability with the selected speaker or other low-impedance network because those values were not present in the supplied source excerpts.
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Motor and Actuator Drive Interface
The L272AM can serve as the high-current interface between a control signal and a motor, solenoid, or actuator when its output-current rating of up to 0.7 A is appropriate for the load. The dual configuration can provide one amplifier channel for drive control and a second channel for sensing or auxiliary signal conditioning. Because the L272AM is an analog amplifier rather than a protected switching motor driver, the external design must include suitable flyback suppression, current limiting, and protection against inductive voltage transients. High-current output and supply traces should be kept short, and the analog ground reference should remain stable even when the load current changes. Engineers should verify the complete motor supply, maximum current, output swing, and thermal limits against the manufacturer datasheet because the supplied excerpts do not quantify those operating constraints.
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Power Buffer Stage
The L272AM is appropriate as a power buffer between a low-current precision signal chain and a heavier load. Its two channels can buffer control and feedback signals independently, while each output stage can source or sink current up to 0.7 A according to the onsemi product page. This capability can reduce the burden on a preceding small-signal op amp and prevent that device from entering saturation when driving a low-resistance input. Layout remains critical: output current must not share narrow, high-resistance paths with sensitive feedback or reference wiring. Supply bypassing should be placed close to the device, and the feedback network should sense the output at a location that accounts for trace and connector resistance. Exact stability, slew-rate, and bandwidth data must be checked from the manufacturer documentation before the buffer is released to production.
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Industrial Instrumentation Output
The L272AM can be used in industrial instrumentation when a sensor or control signal must drive a low-impedance monitoring input rather than remain at the microvolt or millivolt level. The documented 0.7 A output-current capability provides substantially more drive reserve than a conventional precision dual op amp, while the L272A version offers tighter input offset and bias-current specifications. In a practical circuit, one channel may amplify the process signal and the other may support reference, offset, or feedback functions. The analog input and feedback paths should be physically separated from output and motor-current routing to reduce coupling. Because the verified excerpts omit supply range, common-mode range, noise, stability, and thermal data, those specifications must be obtained from the current manufacturer datasheet and checked against the industrial environment before component approval.
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Audio Amplifier Driver
The L272AM can form the high-current driver section of an audio amplifier when the selected speaker network requires more output drive than a small-signal dual op amp can provide. Each channel supports output current up to 0.7 A, and the dual arrangement aligns naturally with left and right audio channels or with a preamp plus feedback channel. The device should operate with the lowest practical supply rail that still supports the required output swing, because excess voltage across the output stage increases dissipation. Decoupling capacitors must be placed directly across the supply pins, and output traces must be sized for the expected load current. Feedback should be taken from a low-impedance output reference rather than across a long connector lead. Complete electrical and thermal limits were not included in the supplied excerpts, so the manufacturer datasheet remains mandatory for final design sign-off.
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Repair and Legacy Equipment
The 8-DIP L272AM is well suited to repairing or extending legacy equipment that originally used a leaded high-current dual operational amplifier. Its through-hole package is straightforward to inspect, solder, and replace on a repair board, while the two-amplifier configuration can match common dual-op-amp circuit organization. The onsemi L272 family description identifies the device for low-impedance loads and up to 0.7 A output current, making it a candidate where an earlier amplifier saturated under load. Before substitution, engineers should compare the original device's pin functions, supply voltage, offset voltage, bias current, output swing, and thermal package. The supplied material confirms only the family relationship between L272AM and L272M; it does not establish that every legacy amplifier is pin-compatible, so schematic verification is mandatory.
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推薦產品摘要
工程參考資料，適用於 L272AM — 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 | L272M |
|---|---|---|
| Brand | onsemi | onsemi |
| Package | 8-DIP | 8-DIP |
| Product Type | Dual high-power operational amplifier | Dual power operational amplifier |
| Amplifier Channels | 2 | 2 |
| Maximum Output Current | 0.7 A | 0.7 A |
| Load Capability | Low-impedance loads | Low-impedance loads |
主要差異化特點
- High-current output capability (對比L272M)
- Tighter A-version input specifications (對比L272M)
- Dedicated low-impedance-load design (對比L272M)
設計說明
Calculate worst-case output-stage dissipation from the selected supply voltage, actual output swing, load current, and ambient temperature. The L272AM can deliver up to 0.7 A, so power loss may remain material even in an 8-DIP package. Use the manufacturer's thermal resistance and maximum junction-temperature data to size the board copper area and determine whether additional airflow or a heat sink is required. Do not treat the package rating or 0.7 A output-current statement as an independent thermal design allowance.
Route each high-current output and supply return as a short, low-impedance path. At currents approaching 0.7 A, even small conductor resistance can produce voltage loss, heating, and output-reference error. Keep analog input and feedback traces away from output and supply-current paths, connect decoupling capacitors close to the device pins, and use a continuous ground reference where practical. Verify the assembled board at the maximum expected load because a bench prototype with short temporary wiring may not reproduce production trace or connector losses.
Do not assume that the L272AM is a pin-compatible substitute for every LM358-style or precision dual op amp merely because both devices contain two amplifiers. The L272AM is a high-power design intended for low-impedance loads and up to 0.7 A output current, while conventional dual op amps have different drive and electrical characteristics. Before substitution, compare every pin, supply range, input common-mode range, output swing, offset, bias current, stability, and thermal limit against the manufacturer datasheets.
合規資訊
The supplied verified excerpts identify the manufacturer, product function, package, and output-current capability but do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. These fields therefore remain unknown rather than inferred.
