LM2904Q2T - Dual 1.1 MHz Op Amp | STMicroelectronics
N.º de pieza: LM2904Q2T ✓ ActivoLM2904Q2T Descripción general
An operational amplifier is an active analog semiconductor that compares two input voltages and drives its output toward the higher-voltage input. In negative-feedback configurations, it amplifies differential signals while maintaining high input impedance and low output impedance. The LM2904Q2T belongs to the operational-amplifier hierarchy: dual amplifier, voltage-feedback amplifier, analog IC, and semiconductor. Two independent channels allow one package to implement two separate signal paths.
Key characteristics include a 1.1 MHz gain-bandwidth product, a 0.6 V/us slew rate, approximately 100 dB gain, and low-power bipolar operation. The manufacturer's listed input-current characteristics include 20 nA and 2 nA. Internal frequency compensation simplifies closed-loop amplifier selection, allowing common gains to be implemented without external compensation components. A wide 3 V to 30 V operating range also supports both conventional 5 V analog systems and higher-voltage industrial rails.
The two amplifiers operate independently, which prevents signal or output interaction between channels except through their shared supply connections. Both channels use single-ended outputs and share internal frequency compensation. This architecture is appropriate for general-purpose voltage amplification, impedance buffering, comparison, instrumentation, and feedback-control blocks where moderate bandwidth and supply flexibility are more important than low-noise precision or rail-to-rail output operation.
Typical applications include sensor-signal conditioning, industrial transducer interfaces, analog control loops, audio preamplifier stages, voltage buffering, and general instrumentation. In a 2 x 2 mm DFN package, the device can reduce board area in designs that can accommodate a land pattern without an exposed thermal pad and maintain adequate copper and assembly process capability.
Design with the LM2904Q2T by verifying input common-mode range, output swing, supply current, and capacitive-load stability against the operating point. Keep sensitive-input and feedback routes short, place input and output bypass capacitors close to their associated supply pins, and follow the manufacturer's layout and soldering guidance for the small-pitch DFN footprint.
This page combines the exact LM2904Q2T ordering information with electrical characteristics, package constraints, application guidance, a same-package replacement assessment, and practical selection criteria. It also distinguishes confirmed drop-in compatibility from broader functional equivalents so engineers can make footprint-aware design decisions without treating similar amplifier specifications as guaranteed interchangeability.
Alternativas directas para LM2904Q2T — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
LM2904AYDT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM2904Q2T Valores máximos y características eléctricas
| Amplifier Type | Low-power bipolar operational amplifier |
| Number of Channels | 2 channels |
| Topología | 2 independent, single-ended output amplifiers |
| Gain-Bandwidth Product | 1.1 MHz |
| Slew Rate | 0.6 V/us |
| Open-Loop Gain | 100 dB |
| Supply Voltage Range | 3 V to 30 V |
| Input Bias Current | 20 nA |
| Input Offset Current | 2 nA |
| Frequency Compensation | Internal |
| Package Type | 8-pin DFN |
| Package Dimensions | 2 mm x 2 mm |
| Recuento de pines | 8 pins |
| Tipo de montaje | Surface mount |
| Tipo de salida | Single-ended |
| Product Status | Active |
Guía de configuración de pines de LM2904Q2T 2 mm x 2 mm
Configuración de pines para LM2904Q2T (encapsulado 2 mm x 2 mm). 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 LM2904Q2T.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LM2904Q2T es adecuado para 6 aplicacións: Industrial Sensor Signal Conditioning, Audio Preamplifier and Buffering, Voltage Buffering and Active Filtering, Control Loop and Feedback Amplifier, Portable and Low-Power Analog Systems, Test and Measurement Front Ends.
Industrial Sensor Signal Conditioning
The LM2904Q2T is appropriate for buffering and amplifying outputs from moderately bandwidth-dependent industrial sensors. Its two independent channels can process related inputs without sharing signal paths, while internal frequency compensation simplifies implementation of standard inverting and non-inverting stages. With a 1.1 MHz gain-bandwidth product and approximately 100 dB open-loop gain, it provides useful headroom for signal amplification without the complexity of an externally compensated amplifier. The design must still confirm the sensor's common-mode voltage, source impedance, output swing, and required accuracy at the selected supply voltage.
Recomendado
Audio Preamplifier and Buffering
LM2904Q2T can serve as a general-purpose audio preamplifier or impedance buffer in equipment that operates from a conventional single supply. The 1.1 MHz gain-bandwidth product is more than sufficient for many low-frequency audio paths, while the 0.6 V/us slew rate helps support moderate signal amplitudes. Because the device is not identified as a rail-to-rail precision amplifier, check output swing at 5 V, distortion, noise, and stability with the intended load. The two channels can support left and right paths in a stereo board.
Recomendado
Voltage Buffering and Active Filtering
The LM2904Q2T is well suited to voltage-following and moderate-gain active-filter stages where a low-versus-high source-impedance transition is required. Its 1.1 MHz gain-bandwidth product sets the practical upper frequency range for common closed-loop gains, while internally compensated channels reduce external component count. Both amplifiers can implement independent active sections on a shared board. Component tolerances, operating-point gain, load capacitance, and permissible output swing should be evaluated together, because the available headroom and stability behavior depend on the complete feedback network.
Recomendado
Control Loop and Feedback Amplifier
LM2904Q2T can be used in feedback-control, current-monitoring, and error-amplifier blocks that require differential sensing and moderate gain. Its approximately 100 dB open-loop gain and 0.6 V/us slew rate support low-frequency loops, while the 3 V to 30 V supply range provides flexibility across 5 V and industrial supply systems. Two channels allow an error amplifier and a current-feedback or output-buffer function to coexist in one package. Loop stability, common-mode limits, saturation recovery, and output-load capability must be checked against the actual control topology.
Recomendado
Portable and Low-Power Analog Systems
The low-power bipolar LM2904Q2T fits compact analog blocks that do not require a rail-to-rail input or output stage. Its 2 mm by 2 mm DFN package allows two amplifiers to occupy little board area, which is valuable in portable equipment, instrumentation, and compact embedded systems. The 3 V minimum supply supports low-voltage operation, but quiescent current, input bias behavior, output swing, and usable bandwidth should be checked against the battery or supply budget. Dense assembly and fine-pitch soldering also require process capability suited to the DFN footprint.
Recomendado
Test and Measurement Front Ends
LM2904Q2T can form the input buffer or amplifier section of a general-purpose test and measurement front end. Its dual architecture supports two measurement channels, and the 1.1 MHz gain-bandwidth product is suitable for many low-to-moderate frequency instrumentation tasks. The device's low-power bipolar construction and 3 V to 30 V supply flexibility make it useful across laboratory and industrial equipment. For precision measurements, engineers should independently evaluate input offset, input bias current, output swing, noise, and source-impedance errors rather than assuming general-purpose performance is sufficient.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM2904Q2T — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM2904AYDT |
|---|---|---|
| Package | 8-pin DFN (2 x 2 mm) with exposed pad | 8-pin DFN with exposed pad |
| Brand | STMicroelectronics | STMicroelectronics |
| Amplifier Count | 2 channels | 2 channels |
| Amplifier Type | Low-power bipolar general-purpose operational amplifier | Dual low-power general-purpose operational amplifier |
Diferenciadores clave
- Confirmed same-manufacturer package alternative (frente a LM2904AYDT)
- Compact two-channel implementation (frente a LM2904AYDT)
- Broad supply-voltage operating range (frente a LM2904AYDT)
Notas de diseño
Follow the manufacturer's DFN land-pattern and solder-process recommendations exactly. The 2 mm by 2 mm package has fine-pitch connections and limited escape-routing space, so assign input and feedback traces before placing decoupling or test points. Confirm the exposed-pad connection and paste design before release to manufacturing, and use an assembly process capable of handling the specified DFN geometry.
Place the supply bypass capacitor close to the power and ground pins and use the shortest practical ground return. Validate the capacitor against the manufacturer's recommended network and evaluate the rail for transient current from both amplifier channels. Because the device is not described as rail-to-rail, verify input common-mode range and output swing across temperature, load, and supply tolerance before selecting the operating point.
Do not treat a similar dual amplifier as interchangeable without checking pin functions, exposed-pad geometry, supply range, common-mode range, output swing, gain-bandwidth, slew rate, offset, and input currents. The LM2904Q2T is a general-purpose bipolar amplifier rather than a precision or rail-to-rail device. Also check capacitive-load stability and loop-gain margins for the selected feedback topology before production release.
Información de cumplimiento
No product-specific compliance declarations were identified for LM2904Q2T. AEC-Q100 status is unknown because the exact automotive qualification status was not stated.
