L272D - Dual 0.7A Power Operational Amplifier | STMicroelectronics
N.º de pieza: L272D ✓ ActivoL272D Descripción general
An operational amplifier is an analog amplifier IC that uses very high open-loop gain and negative feedback to control gain accurately. A power operational amplifier adds a high-current output stage capable of driving lower-impedance loads than a conventional small-signal op amp. In the product hierarchy, the L272D is therefore a dual power operational amplifier, a specialized member of the broader operational amplifier, analog amplifier IC and semiconductor categories.
The L272D provides two amplifier circuits in one 16-SO package, reducing board area compared with separate monolithic dual or single-channel power amplifiers. Its 350 kHz bandwidth is useful in servo and power-control loops, while its output-current capability of up to 0.7 A permits driving loads that would overload a standard precision op amp. The available operating-temperature information for L272D specifies -40°C to +85°C, supporting industrial-temperature equipment where that range is suitable.
The high gain and high output-power capability make the L272 family applicable where an operational amplifier and external power booster would otherwise be required. The device can serve as the active stage in servo systems, power-supply control circuits and other applications that require substantial output current into low-impedance loads. Because it is a power-output device, thermal design, output-stage stability, load transients and supply decoupling remain central engineering considerations.
Typical designs place the L272D close to the load being driven, use local supply bypassing at the amplifier pins, provide stable negative feedback, and verify output-current and thermal limits across worst-case supply and temperature conditions. The available verified data does not include complete output-voltage swing, supply-current, slew-rate, input-offset, gain-bandwidth or thermal-resistance tables, so those values require confirmation in the manufacturer datasheet before final design release.
This page combines the verified STMicroelectronics product description, distributor packaging information, operating-temperature and bandwidth data, practical application guidance, and the available cross-reference information. It also distinguishes verified engineering facts from parameters that still require datasheet confirmation, helping engineers evaluate the L272D without inventing electrical values.
Alternativas directas para L272D — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con L272D (mismo factor de forma y huella) — difiere en Package.
L272D2
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Ver hoja de datos →L272D2TF
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L272D Valores máximos y características eléctricas
| Product Type | Dual high-power operational amplifier |
| Number of Amplifier Circuits | 2 circuits |
| Corriente de salida máxima | 0.7 A |
| Bandwidth | 350 kHz |
| Rango de temperatura de funcionamiento | -40°C to +85°C |
| Encapsulado | 16-SO |
| Tipo de montaje | Surface mount |
| Architecture | Monolithic integrated circuit |
| Load Capability | Low-impedance loads |
| Signal Type | Analog |
| Gain | High gain |
| Output Power Capability | High output power capability |
| Primary Applications | Servo amplifiers and power supplies |
| Additional Legacy Applications | Compact disc and VCR |
| Estado RoHS | Compliant |
Guía de configuración de pines de L272D 16-so
Configuración de pines para L272D (encapsulado 16-so). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para L272D.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
L272D es adecuado para 6 aplicacións: Servo Motor Control, Power-Supply Control, Audio Amplification and Buffering, Industrial Instrumentation, Compact Disc and Legacy Audio Equipment, Low-Impedance Motor Driver Stage.
Servo Motor Control
The L272D fits servo-control loops that require substantially more output current than a general-purpose op amp can provide. Its two amplifier channels can support complementary or coordinated control functions, while output current up to 0.7 A and bandwidth of 350 kHz provide useful drive capability for low-impedance servo loads. The amplifier should be placed near the motor-driver stage rather than far from the load, and its local supply pins should be bypassed to limit transient feedback into the control loop. Feedback-network stability and the motor's reactive load must be evaluated because inductance and back-EMF can create phase shifts not represented by a simple resistive load.
Recomendado
Power-Supply Control
The L272D is suitable for the active control section of a power supply where the feedback network must drive a relatively low-impedance stage. STMicroelectronics identifies power supplies as an intended L272-family application, and the verified 0.7 A output-current capability distinguishes it from conventional precision op amps. Place the device close to the power stage, use separate local supply bypassing and connect the feedback components close to the amplifier pins. Because the supplied data does not specify output swing or supply-current limits, the final operating points must be checked against the manufacturer datasheet before setting gain and compensation.
Recomendado
Audio Amplification and Buffering
The L272D can buffer or amplify signals destined for a lower-impedance audio-style load because it combines high gain with output current up to 0.7 A. Its 350 kHz bandwidth covers the audio band and extends beyond it, while the dual-channel configuration reduces the component count for stereo or balanced signal paths. Layout should keep feedback routing short, provide adequate supply bypassing and maintain a stable load network where capacitive loading could interact with the output stage. The verified data does not establish harmonic distortion or output-voltage swing, so the manufacturer datasheet should be reviewed before using it as a substitute for a dedicated audio power amplifier.
Recomendado
Industrial Instrumentation
The L272D can be used in industrial instrumentation when a sensor or control signal must drive a lower-impedance stage rather than only provide a high-impedance measurement output. Its -40°C to +85°C stated operating range accommodates industrial environments, while the 350 kHz bandwidth supports signals beyond slow process-control loops. The amplifier should be mounted with suitable thermal copper and protected from excessive supply or output voltage. Since the available data does not provide input offset voltage, input bias current or noise specifications, precision measurement designs should use this device for drive stages only unless those parameters are confirmed and acceptable.
Recomendado
Compact Disc and Legacy Audio Equipment
STMicroelectronics explicitly lists compact disc and VCR among the L272 family's intended applications, making the L272D relevant to service and redesign work in legacy audio-video equipment. Its dual power-amplifier configuration can reduce board area, and output current up to 0.7 A provides the load drive required by audio output stages that exceed ordinary op-amp limits. For repair designs, preserve the original pin assignments, negative-feedback topology and supply polarity. The exact replacement should also be checked for slew rate, output swing and thermal behavior because those parameters are not present in the supplied verified data.
Recomendado
Low-Impedance Motor Driver Stage
The L272D can serve as the high-current amplifier preceding or integrated with a motor-driver output stage, particularly in servo and actuator systems. Its verified 0.7 A output capability provides more drive authority than a conventional LM324D, while 350 kHz bandwidth is sufficient for many control-loop signal ranges. Place the amplifier near the power stage and isolate feedback from motor wiring to avoid inductive pickup. Current limiting, reverse-voltage protection and stable compensation must be added as required by the motor topology, and the complete design should be verified across load, temperature and supply extremes.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para L272D — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | L272D2 | L272D2TF |
|---|---|---|---|
| Package | 16-SO | 16-SO | 16-SO |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Type | Dual high-power operational amplifier | L272-family dual power operational amplifier | L272-family dual power operational amplifier |
| Number of Amplifier Circuits | 2 circuits | 2 circuits | 2 circuits |
| Output Current | Up to 0.7 A | Up to 0.7 A | Up to 0.7 A |
Diferenciadores clave
- High-current output capability (frente a LM324D)
- Dual power-amplifier integration (frente a MC1458D)
- Higher bandwidth for power drive (frente a TS556ID)
- Purpose-built low-impedance drive (frente a L272D2)
Notas de diseño
Treat the L272D as a power amplifier rather than a conventional low-power op amp. The verified output-current capability is up to 0.7 A, but the available data does not provide thermal resistance or maximum output swing. Before release, calculate worst-case dissipation from the actual supply voltage, output voltage and load current, then verify junction temperature using the manufacturer's thermal data and the PCB copper area.
Place the L272D close to the driven load and the power-stage components, and place supply-bypass capacitors at the amplifier pins using the shortest possible current-loop path. Keep high-current output wiring away from input and feedback traces to reduce inductive pickup. A solid ground plane and carefully arranged feedback components are especially important because the device is intended for low-impedance and high-current loads.
Do not substitute a general-purpose op amp solely because both devices have similar pin counts. The L272D is a high-power dual amplifier with output current up to 0.7 A, whereas a precision quad amplifier has a different channel arrangement and much lower drive capability. Verify supply limits, output swing, slew rate, offset, bias current, thermal limits, pinout and load stability in the official datasheet before redesigning or repairing a board.
Stability with reactive or capacitive loads must be checked rather than inferred from the 350 kHz bandwidth alone. Keep feedback traces short, avoid routing output-current paths beneath the amplifier, and use the manufacturer's recommended compensation or isolation methods where available. Test the final load network with representative transients because motor inductance, audio coupling and power-supply feedback can introduce phase shifts not captured by a resistive-load test.
Información de cumplimiento
RoHS compliance is reported by the supplied IC-Components product result. REACH, lead-free, halogen-free, conflict-minerals and automotive qualification information are not established by the supplied verified data.
