L272AD2TF - 0.7A Dual Power Operational Amplifier | Fairchild Semiconductor
N.º da peça: L272AD2TF ✗ Fim de vidaL272AD2TF Visão geral
A power operational amplifier is an operational-amplifier category optimized for driving low-impedance loads while maintaining useful output voltage and current capability. The L272A belongs to the broader operational amplifier hierarchy, which includes instrumentation, voltage-feedback, current-feedback, audio, and power-buffer devices. Its two-channel construction can reduce component count in stereo audio, motor-control, actuator, power-converter feedback, and general industrial signal-conditioning circuits.
The key electrical characteristics visible for this exact part include a 1 V/us slew rate, approximately 350 kHz bandwidth, approximately 1 uA input bias current, and approximately 30 mV input offset voltage. The manufacturer listing identifies the L272A as a dual amplifier with 0.7 A output current capability. These specifications make the part suitable for designs where the load presents a significantly lower impedance than the load handled by a conventional small-signal operational amplifier.
Typical applications include audio output stages, motor and solenoid drivers, low-impedance sensor interfaces, power-supply control loops, industrial controls, and communication equipment. In each case, the design must verify the output-current limit, supply-voltage range, output-voltage swing, thermal dissipation, and stability with the actual load. The SOIC-16 package also requires attention to copper area and thermal management when the amplifier operates near its maximum current capability.
For robust implementation, start with the manufacturer’s recommended dual-supply or single-supply configuration and use the power and decoupling connections shown in the datasheet. Keep high-current output returns short and connect input and feedback traces away from output-current paths. Confirm the load’s resistance, capacitance, and grounding arrangement before layout because a power amplifier can become unstable when driving nonlinear or highly capacitive loads.
This product page combines the exact part identification, verified electrical highlights, package information, sourcing context, and application-focused design guidance for engineers evaluating the L272AD2TF. The manufacturer’s technical documentation remains the controlling reference for absolute maximum ratings, full electrical tables, pin functions, and test conditions.
Alternativas drop-in para L272AD2TF — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com L272AD2TF (mesmo formato e footprint) — diferindo em Package, Amplifier Type, Number of Channels, Slew Rate.
L272D2
✅ Drop-InConsulte o preço
Ver ficha técnica →L272D013TR
✅ Drop-InConsulte o preço
Ver ficha técnica →L272AD2TF Classificações máximas e características elétricas
| Amplifier Type | Dual power operational amplifier |
| Number of Channels | 2 |
| Output Current Capability | 0.7 A |
| Slew Rate | 1 V/us |
| Bandwidth | 350 kHz |
| Input Bias Current | 1 uA |
| Input Offset Voltage | 30 mV |
| Encapsulamento | 16-SOIC |
| Tipo de montagem | Surface mount |
| Device Classification | Standard general-purpose amplifier |
| Load Capability | Low-impedance loads |
Guia de Configuração de Pinos do L272AD2TF 16-soic
Configuração de pinos para L272AD2TF (pacote 16-soic). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para L272AD2TF.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
L272AD2TF é adequado para 6 aplicaçãos: Stereo Audio Output Stage, Motor and Solenoid Driver Interface, Low-Impedance Sensor Front End, Power-Supply Feedback Control, Industrial Control Signal Output, Communications Buffer Amplifier.
Stereo Audio Output Stage
The L272AD2TF fits low-impedance stereo output stages because it combines two amplifier channels, a 1 V/us slew rate, and output current capability up to 0.7 A in one 16-SOIC package. Each channel can serve as a power-buffer stage when the preceding circuit develops the voltage signal. The designer must confirm output-voltage swing, gain-bandwidth behavior, distortion, and thermal rise into the intended speaker or line load. Short output and return paths are especially important because several hundred milliamps of load current can create ground offsets that appear as signal distortion. Use the manufacturer’s recommended power connections and bypass capacitors, and validate stability with the actual speaker cable and input capacitance.
Recomendado
Motor and Solenoid Driver Interface
The L272AD2TF is suitable for voltage-control interfaces that drive low-impedance motor or solenoid loads, where its output-current capability up to 0.7 A offers more drive than a conventional signal amplifier. The operational amplifier can operate inside a feedback loop or as a current-driving stage with suitable external circuitry. Because motor loads are inductive and their resistance changes with temperature, limit the output current and use protection against flyback energy. Verify the exact supply voltage, output swing, saturation behavior, and thermal performance at the maximum duty cycle. Place the power-return path directly to the supply system rather than through sensitive analog ground traces.
Recomendado
Low-Impedance Sensor Front End
The L272AD2TF can serve as the output stage of a sensor signal conditioner when the sensor has low source impedance and requires more output drive than a precision amplifier can provide. Its approximately 1 uA input bias current helps limit loading on high-impedance sensing networks, while the L272A family’s tighter offset-voltage and offset-current specifications support more accurate DC behavior than the original L272. The approximately 350 kHz bandwidth and 1 V/us slew rate cover many sensor-conditioning bandwidths, but the selected feedback network must preserve stability. Check input common-mode limits, output swing, noise performance, and sensor grounding before fixing the signal-chain gain.
Recomendado
Power-Supply Feedback Control
The L272AD2TF can amplify error and feedback signals in power-supply control loops that need an output capable of driving low-impedance sensing or gate-related networks. Its dual-channel construction allows one section to monitor the power stage while the other handles another control function. With a 1 V/us slew rate and approximately 350 kHz bandwidth, the device can respond to many control loops, although loop compensation must account for the power stage and amplifier output behavior. Validate supply range, output saturation, stability with realistic compensation capacitors, and the thermal effect of continuous high-current operation. Keep the feedback divider and compensation nodes physically separated from output-current paths.
Recomendado
Industrial Control Signal Output
The L272AD2TF is applicable to industrial control modules that must convert low-level command signals into stronger analog outputs for downstream drivers or instrumentation. Its two channels can reduce board area in dual-axis or dual-output designs, while the 16-SOIC package supports standard surface-mount assembly. Industrial environments require attention to supply noise, temperature range, grounding, and protection from external wiring. Before release, confirm the amplifier’s operating temperature rating and absolute maximum limits, and evaluate whether the 30 mV-level input offset can be calibrated out for the required accuracy. Use isolation or protection components where the external cable leaves the control board.
Recomendado
Communications Buffer Amplifier
The L272AD2TF can provide a high-current output buffer in communication equipment where a low-impedance cable, transducer, or subsequent analog stage requires more drive than the source device can supply. Its dual-channel configuration can buffer two related channels, and the approximately 350 kHz bandwidth covers many baseband and control-bandwidth applications. The designer should evaluate input offset, noise, output distortion, and stability at each operating frequency rather than relying only on the bandwidth label. For remote or unbalanced cables, include appropriate line protection and keep the high-current return path away from sensitive receiver channels. Verify the complete frequency response and output impedance before deployment.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para L272AD2TF — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | L272D2 | L272D013TR |
|---|---|---|---|
| Brand | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor |
| Package | 16-SOIC | 16-SOIC | 16-SOIC |
| Amplifier Configuration | Dual operational amplifier | Dual power operational amplifier | Dual power operational amplifier |
| Accuracy Family | L272A with tighter input bias and offset specifications | L272 family; specific limits require comparison | L272 family; specific limits require comparison |
| Intended Load | Low-impedance load | Low-impedance load | Low-impedance load |
Principais diferenciais
- Higher DC input-accuracy positioning within the listed L272 family (vs L272D2)
- Power-stage output drive suited to low-impedance loads (vs L272D013TR)
- Two integrated high-current channels in one standard surface-mount package (vs L272D2)
Notas de projeto
Treat the 0.7 A output-current capability as a thermal design constraint, not merely a drive specification. Estimated: continuous output power equals VOUT multiplied by IOUT before amplifier losses; for example, 5 V at 0.5 A produces 2.5 W of load-side dissipation. Add the amplifier’s internal loss and compare total device heating with the package thermal rating. Use generous ground-plane copper and shorten the high-current path, while confirming junction temperature under the worst-case ambient temperature and load duty cycle.
Place bypass capacitors and feedback components next to their associated pins, and give output-current traces the shortest practical route between the device, load, and supply return. Use wide copper where board area permits because resistance in the output and return paths creates voltage loss and heating. Do not route output current through the ground reference used by low-level input signals; use a planned return-current path that prevents amplifier output current from appearing as input error.
Do not substitute an ordinary dual operational amplifier solely because it has the same pin count. A standard SOIC-16 dual amplifier may use different pin assignments and will not provide the L272AD2TF’s 0.7 A output capability. Before replacing the device, compare the complete pin description, supply range, input common-mode range, output swing, output-current limit, thermal limits, and stability with capacitive loads. The LM201AD is a functional lead, but its interchangeability must be established from its datasheet rather than inferred.
Keep feedback traces short and place compensation components close to the amplifier. High-current output transitions can couple into input and feedback nodes through supply impedance or board capacitance. Use a solid ground reference, minimize shared impedance between input return and output return, and test the assembled board with the intended cable or capacitive load. Verify settling and oscillation margin because a power output stage can appear stable with a resistive load yet become unstable with a long cable or additional capacitance.
Informações de conformidade
No exact-part RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations were identified for L272AD2TF. AEC-Q100 is not applicable because this is a general-purpose operational amplifier rather than an automotive-qualified device.
