L272AD2 - Dual 0.7A Power Op Amp, 16-SOIC | onsemi
部品番号: L272AD2 ✗ 生産終了L272AD2 概要
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.
ドロップイン代替品: L272AD2 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: L272AD2 （同一形状・フットプリント） — 相違点: Package.
L272D013TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
L272AD2 最大定格＆電気的特性
| Product Type | Dual high-power operational amplifier |
| Amplifier Channel Count | 2 circuits |
| Output Current Capability | Up to 0.7 A |
| 電源電圧 | ±14 V / 28 V total |
| Power Supply Type | Split dual supply |
| Load Compatibility | Low-impedance loads |
| パッケージ | 16-pin SOP (16-SOIC) |
| 実装タイプ | Surface mount |
| Product Classification | Standard general-purpose amplifier |
L272AD2 16-pin sop (16-soic) ピン配置ガイド
L272AD2 (16-pin sop (16-soic) パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: L272AD2.
詳細は データシート をご参照ください。
主な用途
L272AD2 の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: L272AD2 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Higher-grade A-version electrical specifications （vs L272D013TR)
- Direct low-impedance drive capability （vs L272D013TR)
- Dual-channel integration in a surface-mount package （vs L272D013TR)
設計ノート
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.
コンプライアンス情報
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.
