MC3403DT - Quad 36V 1MHz Op Amp IC | STMicroelectronics
N.º de pieza: MC3403DT ✓ ActivoMC3403DT Descripción general
An operational amplifier is an amplifier IC that compares two input voltages and drives its output to represent their difference. A differential input stage rejects common-mode signals, while internal frequency compensation simplifies closed-loop design. The MC3403 combines four amplifiers in one package, placing it in the hierarchy of quad op amp, operational amplifier, analog amplifier IC, and semiconductor. Its broad supply range also makes it a bridge between classic 741-class circuitry and newer low-voltage single-supply systems.
Key features include four independent amplifier channels, true differential inputs, 1 MHz gain-bandwidth performance, operation down to a 3 V single supply, and operation up to a 36 V single supply. Each output stage uses a Class AB topology for reduced crossover distortion, while short-circuit protection improves robustness when an output is driven into a difficult load. The internally compensated design supports direct use as a voltage follower or noninverting amplifier without external frequency-compensation components.
The MC3403 family combines the general-purpose behavior of the UA741 with lower supply-current demand and improved suitability for single-supply operation. Each channel presents differential inputs, allowing signals to be referenced around the supply midpoint in single-supply circuits. Because the amplifiers are not rail-to-rail, input and output common-mode limits remain important when the signal approaches either supply rail. Designers should use the manufacturer data sheet for exact electrical limits, input-offset voltage, slew rate, output-current capability, and channel-matching characteristics.
Typical uses include sensor-signal conditioning, low-frequency active filters, instrumentation amplifiers, audio preamplifiers, transducers, analog control loops, and general instrumentation. Four amplifiers in one package can implement a complete filter, multi-stage gain block, comparator-style signal conditioning, or several independent channels when board area and component count are priorities. The SOIC-14 package also supports conventional through-hole PCB assembly rather than requiring a fine-pitch surface-mount land pattern.
When designing around the MC3403DT, begin with the required input and output common-mode range at the actual supply voltage. Place supply-bypass capacitors near the device, maintain a stable reference point for single-supply signals, and verify stability for the selected gain, load, and feedback network. Avoid relying on rail-to-rail operation, and check the maximum total supply voltage when combining bipolar or dual-supply systems.
This product page combines the manufacturer operating limits, package information, sourcing details, pin-level guidance, drop-in comparison criteria, and practical circuit considerations into one engineering reference. It also identifies where a new design should remain with the MC3403 family and where a lower-voltage or differently characterized amplifier offers a better fit.
Alternativas directas para MC3403DT — 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 MC3403DT (mismo factor de forma y huella) — difiere en Input Bias Current, Input Offset Voltage, Input Type, Operating Class, Output Type.
MC3403DR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM324DR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →TLV9304DR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM239DR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →MC3403DT Valores máximos y características eléctricas
| Amplifier Count | 4 amplifiers |
| Gain-Bandwidth Product | 1 MHz |
| Single-Supply Operating Voltage | 3 V to 36 V |
| Dual-Supply Operating Voltage | +/-18 V |
| Input Bias Current | 500 nA maximum |
| Input Type | True differential inputs |
| Compensation | Internally compensated |
| Output Stage | Class AB |
| Output Protection | Short-circuit protected |
| Encapsulado | 14-pin SOIC |
| Tipo de montaje | Surface mount |
| Product Family | MC3403 series |
| Operating Class | Low-cost, general-purpose operational amplifier |
Configuración de pines de MC3403DT
| Pin 1 | OUT1 — Amplifier 1 output |
| Pin 2 | IN1- — Amplifier 1 inverting input |
| Pin 3 | IN1+ — Amplifier 1 non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | IN2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN2- — Amplifier 2 inverting input |
| Pin 7 | OUT2 — Amplifier 2 output |
| Pin 8 | OUT3 — Amplifier 3 output |
| Pin 9 | IN3- — Amplifier 3 inverting input |
| Pin 10 | IN3+ — Amplifier 3 non-inverting input |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IN4+ — Amplifier 4 non-inverting input |
| Pin 13 | IN4- — Amplifier 4 inverting input |
| Pin 14 | OUT4 — Amplifier 4 output |
Aplicaciones típicas
MC3403DT es adecuado para 6 aplicacións: Sensor Signal Conditioning, Active Filter and Control Networks, Audio Preamplifier, Instrumentation Signal Chain, Transducer and Bridge Interface, General-Purpose Analog Control.
Sensor Signal Conditioning
The MC3403DT is suitable for conditioning low-frequency sensor outputs because it combines four true-differential amplifier sections with a 1 MHz gain-bandwidth product and input bias current of 500 nA maximum. Two channels can amplify a differential sensor while the remaining sections provide filtering or level conditioning. In single-supply systems, the signal and feedback network should be biased around the supply midpoint. Confirm the input-offset voltage, common-mode range, and output swing at the selected supply before committing to a precision sensor front end.
Recomendado
Active Filter and Control Networks
The four internally compensated amplifiers in the MC3403DT can implement cascaded low-pass, high-pass, notch, or multi-stage control networks in instrumentation and industrial control equipment. A 1 MHz gain-bandwidth product is appropriate for low-to-moderate frequency closed-loop stages, while the 3 V to 36 V supply range supports both compact control circuits and higher-voltage analog systems. Validate each stage against the desired closed-loop gain, load, phase margin, and component tolerances, because the internal compensation sets the usable bandwidth and stability envelope.
Recomendado
Audio Preamplifier
The MC3403DT can provide low-frequency gain stages for microphone, line-level, and general audio preamplification when operated within its output-swing and bandwidth limits. Its Class AB output stage is designed for low crossover distortion, and four channels allow stereo gain and filtering or an additional buffered stage. The 3 V minimum supply is useful for compact systems, but the amplifier is not rail-to-rail; the designer must preserve sufficient output headroom and verify input noise, slew rate, and maximum distortion against the audio specification.
Recomendado
Instrumentation Signal Chain
The MC3403DT is useful in instrumentation systems requiring several low-frequency gain or buffer stages around a sensor or measurement bridge. True differential inputs simplify accepting a sensor voltage while rejecting common-mode disturbance, and the internally compensated channels can implement voltage followers or standard closed-loop gain blocks. Because the device is not a dedicated precision instrumentation amplifier, offset and bias errors must be included in the error budget. Confirm whether generic quad-amplifier performance meets the measurement accuracy target.
Recomendado
Transducer and Bridge Interface
A MC3403DT-based interface can buffer strain-gauge, resistive-bridge, temperature, and other slowly varying transducer signals while providing the gain needed by a following converter or controller. The 500 nA maximum input bias current is useful with high-impedance sensors, and the wide single-supply range accommodates multiple industrial supply levels. The circuit should include input protection, defined common-mode biasing, and close bypass capacitance. Verify input bias current, offset, noise, and common-mode behavior over the actual sensor impedance and temperature range.
Recomendado
General-Purpose Analog Control
The MC3403DT supports analog control loops, error amplifiers, reference buffers, and low-frequency feedback networks where four channels reduce package count. It can operate from a single 3 V to 36 V rail or from dual +/-18 V supplies, providing flexibility in industrial and embedded analog designs. Stability and output-drive checks remain essential because the load, feedback components, and supply voltage influence closed-loop behavior. Use local supply bypassing and maintain a low-impedance return path to prevent output-current transients from corrupting the controlled signal.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC3403DT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC3403DR | LM324DR | TLV9304DR | LM239DR |
|---|---|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Brand | STMicroelectronics | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Count | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers |
| Maximum Single-Supply Voltage | 36 V | 30 V (-16.7%) | 36 V (0%) | 36 V (0%) | 24 V (-33.3%) |
Diferenciadores clave
- Higher maximum supply rating than the closest TI MC3403 comparison (frente a MC3403DR)
- Single-supply operation extends down to 3 V (frente a LM239DR)
- Four matched functional sections reduce component count (frente a TLV9304DR)
Notas de diseño
Verify both the maximum total supply voltage and the usable input and output common-mode range at the selected operating voltage. The MC3403DT supports single supplies from 3 V to 36 V and dual supplies of +/-18 V, but it is not rail-to-rail. Add supply-bypass capacitance close to pins 4 and 11, and keep the return-current path short so output transients do not create ground offsets in sensitive analog signals.
Do not assume that a 14-pin footprint alone guarantees a drop-in replacement. The TI MC3403DR comparison has a 30 V maximum supply rating versus 36 V for the STMicroelectronics part, and the LM239DR comparison has a 24 V maximum rating. Check input-offset voltage, input bias current, gain-bandwidth product, slew rate, output-current capability, output swing, noise, stability, and temperature grade before approving any substitute.
Place input resistors, feedback components, and bypass capacitors close to their associated pins to minimize parasitic capacitance and feedback-loop length. For sensitive inputs, keep the inverting and non-inverting traces away from switching nodes and high-current return paths. A solid ground plane reduces impedance, while local decoupling helps prevent supply ripple and output-current transients from modulating the reference point of the analog signal.
Use the internally compensated amplifier only with feedback networks that satisfy the manufacturer's stability guidelines for the selected gain, load, and supply. Add an isolation resistor when driving capacitive loads, and evaluate transient response rather than relying solely on the 1 MHz gain-bandwidth figure. In low-frequency filters, component tolerances and amplifier input-voltage noise can shift the actual response and should be included in the design margin.
Información de cumplimiento
The MC3403 is a general-purpose operational amplifier rather than an automotive-qualified device. Compliance declarations were not established by the manufacturer page snippets and should be confirmed for the ordered package and terminal-finish configuration.
