MC3403DG - Quad 1MHz Op Amp, 3-36V | onsemi
Référence : MC3403DG ✓ ActifMC3403DG Présentation
An operational amplifier, or op amp, is a voltage-amplified differential building block whose open-loop gain falls with frequency. The MC3403 family belongs to the broader hierarchy of analog amplifier ICs used to amplify small differential signals, buffer high-impedance sources, implement active filters, and close feedback loops around sensors or actuators. Its true differential inputs make the device particularly useful when a useful output must follow the difference between two input voltages rather than either input alone.
The quad configuration provides four amplifiers in one 14-pin SOIC, reducing board area and simplifying multi-channel designs. Key characteristics include operation from 3 V to 36 V, a 1 MHz gain-bandwidth product, and a maximum input offset voltage of 10 mV as listed by Mouser. The part is identified as a standard general-purpose amplifier and is suitable for instrumentation, buffer-amplifier, measurement, filtering, and precision-control applications.
Its single-supply capability is particularly useful in cost-sensitive systems where one supply rail must support the complete analog signal chain. Differential inputs allow subtraction, current-loop monitoring, sensing across resistive elements, and amplification of sensor outputs without external input networks. Because the package contains four amplifiers, designers can use matched functional channels for simultaneous acquisition, multi-axis sensing, or multiple filter stages while preserving consistent board organization.
Typical uses include 4-20 mA process-control inputs, resistive sensor conditioning, active low-pass or band-pass filters, buffered sensor outputs, general-purpose instrumentation, and current-shunt measurements. The 3 V minimum supply supports modern 3.3 V systems, while the 36 V maximum provides additional headroom for industrial supply rails. Commercial-temperature operation is identified in distributor listings, although the exact temperature limits require confirmation from the manufacturer datasheet.
When laying out a MC3403DG circuit, place input, feedback, and compensation components close to the relevant SOIC pins and provide adequate return paths for each amplifier channel. Decoupling capacitors should connect between the supply pins and ground with short traces, and unused amplifier inputs should be tied to a defined potential rather than left floating. Check output-current, input-common-mode, noise, and stability requirements against the complete operating conditions before finalizing the design.
This product page combines verified manufacturer and distributor information, a complete 14-pin pinout, practical single-supply design guidance, and a parameter-based comparison with available 14-pin quad amplifier alternatives. It also distinguishes confirmed electrical characteristics from parameters that still require verification in the manufacturer datasheet.
Alternatives de remplacement direct pour MC3403DG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC3403DG (même facteur de forme et même empreinte) — différant par Mounting Type, Package, Input Offset Voltage, Input Type, Output Type.
MC3303D
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC34074DR2G
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM324D
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →TLV9304ID
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM224DR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →MC3403DG Valeurs maximales et caractéristiques électriques
| Amplifier Count | 4 amplifiers |
| Product Type | Single-supply quad operational amplifier |
| Supply Voltage Range | 3 V to 36 V |
| Gain-Bandwidth Product | 1 MHz |
| Input Offset Voltage | 10 mV maximum |
| Input Type | True differential inputs |
| Type de sortie | Single-supply amplifier |
| Boîtier | 14-pin SOIC |
| Nombre de broches | 14 pins |
| Type de montage | Surface-mount SOIC |
Configuration des broches de MC3403DG
| Broche 1 | OUT 1 — Output of amplifier 1 |
| Broche 2 | IN 1- — Inverting input of amplifier 1 |
| Broche 3 | IN 1+ — Non-inverting input of amplifier 1 |
| Broche 4 | V- — Negative supply connection |
| Broche 5 | IN 2+ — Non-inverting input of amplifier 2 |
| Broche 6 | IN 2- — Inverting input of amplifier 2 |
| Broche 7 | OUT 2 — Output of amplifier 2 |
| Broche 8 | OUT 3 — Output of amplifier 3 |
| Broche 9 | IN 3- — Inverting input of amplifier 3 |
| Broche 10 | IN 3+ — Non-inverting input of amplifier 3 |
| Broche 11 | V+ — Positive supply connection |
| Broche 12 | IN 4+ — Non-inverting input of amplifier 4 |
| Broche 13 | IN 4- — Inverting input of amplifier 4 |
| Broche 14 | OUT 4 — Output of amplifier 4 |
Applications typiques
MC3403DG convient pour 6 applications: Current-Shunt Monitoring, Industrial Sensor Signal Conditioning, Active Filtering and Control Loops, Buffering and Level Conditioning, Audio and Communication Interface Circuits, Precision Control and Measurement.
Current-Shunt Monitoring
The MC3403DG fits current-shunt monitoring because its four true differential-input amplifiers can measure small voltage differences across a low-value shunt without requiring the input signal to move above ground. Its verified 1 MHz gain-bandwidth product supports signal amplification in bandwidths up to the application requirement, while the 3 V to 36 V supply range accommodates 3.3 V electronics and higher industrial rails. Each amplifier can be assigned to a separate shunt or signal-conditioning channel, reducing component count while keeping feedback routing straightforward. The principal limitation is the available input common-mode range and output swing, which must be checked in the onsemi datasheet for the exact shunt position and gain used.
Recommandé
Industrial Sensor Signal Conditioning
The MC3403DG is well suited to industrial sensor conditioning because four differential amplifier channels can buffer and amplify outputs from resistive, bridge, and low-level transducer sensors in one 14-pin SOIC. A 3 V minimum supply supports modern sensor electronics, while the 36 V maximum rating provides flexibility where a higher rail is already present. The true differential inputs are useful when the measured quantity is the voltage between two sensor nodes rather than either node relative to ground. For reliable deployment, compare the amplifier's common-mode and output-swing limits with the sensor's operating range, use short feedback paths, and verify channel stability at the selected closed-loop gain.
Recommandé
Active Filtering and Control Loops
The MC3403DG can implement active low-pass, high-pass, band-pass, and feedback-control circuits because each of its four amplifiers provides an independent analog building block. The verified 1 MHz gain-bandwidth product gives designers a defined bandwidth reference when selecting resistor and capacitor values, while true differential inputs facilitate filter topologies that subtract or combine signals. In control loops, the amplifier may drive a supervisory signal or compare a feedback voltage against a reference. Stability must be checked for the target closed-loop gain and load, particularly because compensation-network values interact with noise gain. The 14-pin SOIC also allows the four channels to be placed close to their source and destination circuitry on a mixed-signal board.
Recommandé
Buffering and Level Conditioning
The MC3403DG is appropriate for buffering sensor outputs, interface signals, and multiplexed analog channels when the source impedance requires more drive than the following block can provide. Its four amplifiers permit simultaneous buffering of several independent signals in a compact 14-pin SOIC, and the 3 V to 36 V operating range supports both low-voltage portable systems and industrial supplies. A unity-gain buffer configuration is straightforward, but the output must remain inside the amplifier's specified output-swing range and the load must remain within its current capability. Engineers should also check capacitive-load stability, especially when driving long PCB traces, ADC sampling inputs, or multiplexed networks.
Recommandé
Audio and Communication Interface Circuits
The MC3403DG can serve in modest audio, communications, and general interface circuits where four economical differential amplifier channels are useful for summing, gain stages, or impedance matching. Its 1 MHz gain-bandwidth product is substantially wider than many low-frequency audio paths, while the true differential inputs support balanced signal handling. The device is not presented as a low-noise precision audio amplifier, so input-referred noise and distortion specifications remain necessary design checks for high-fidelity requirements. Designers should keep input and feedback routing compact, maintain return paths between channels, and verify output swing, slew rate, and load capability before using the amplifier for microphone, line, or communications interfaces.
Recommandé
Precision Control and Measurement
The MC3403DG supports precision-control and measurement tasks that require several comparisons or amplification channels without using four separate packages. The four true differential inputs can compare sensed voltages with references, create error signals, and condition outputs for a controller or data converter. Its maximum input offset voltage is listed as 10 mV, a value that must be included in error budgets for precision measurements alongside bias current, offset drift, noise, and common-mode error. The 3 V to 36 V supply range is useful for mixed industrial systems. Calibration, input filtering, and grounding can reduce practical error, but designs requiring offset below 10 mV should compare the datasheet limit and temperature behavior before selecting this amplifier.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC3403DG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC3303D | MC34074DR2G | LM324D | TLV9304ID | LM224DR |
|---|---|---|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Brand | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Count | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers | 4 amplifiers |
| Pin Count | 14 pins | 14 pins | 14 pins | 14 pins | 14 pins | 14 pins |
Principaux différenciateurs
- Four true differential-input amplifiers in one 14-pin SOIC (vs MC34074DR2G)
- Single-supply operation from a 3 V minimum supply (vs LM324D)
- Documented 10 mV maximum input offset voltage (vs TLV9304ID)
- Economical four-channel integration for general-purpose analog circuits (vs NE5534DR)
Notes de conception
Place each feedback resistor and input compensation component close to the pins of its associated amplifier. With four amplifiers in one 14-pin SOIC, pin 7 and pin 8 are adjacent outputs, so keep the two channels' input and feedback paths physically separated to reduce crosstalk. Place the supply-decoupling capacitor close to pins 11 and 4 with a short, low-inductance ground return, and provide adequate ground-plane continuity beneath the device.
Do not assume the full 3 V to 36 V supply rating applies to every input and output combination. Confirm the valid input common-mode range, output swing, output-current limit, and stability for the selected gain from the manufacturer datasheet. Inputs should never be allowed to exceed the amplifier's absolute-maximum ratings, and unused amplifier inputs must be connected to a defined potential rather than left floating.
Calculate total supply demand from four channels rather than one because the MC3403DG contains four amplifiers. The verified sources do not provide a confirmed per-channel quiescent-current value, so obtain that figure from the onsemi datasheet before sizing the supply and estimating heat. The 36 V maximum supply is a voltage rating, not a recommended operating point, and practical dissipation depends on supply voltage, quiescent current, output current, and the voltage dropped across each amplifier.
For sensitive measurements, keep the MC3403DG away from switching nodes, high-current inductors, and digital return currents. Use a continuous ground plane, place the amplifier on the quieter side of the board when partitioning permits, and route differential input pairs together rather than allowing them to cross unrelated signals. If the amplifier follows a multiplexer or ADC, minimize input-node capacitance and verify settling behavior at the selected gain and bandwidth.
Informations de conformité
The verified results do not explicitly provide material-compliance declarations for MC3403DG. The part is listed as a commercial-temperature general-purpose amplifier, so no AEC-Q100 qualification is claimed.