MC3403NS - Quad 30V 1MHz Op Amp | Texas Instruments
부품 번호: MC3403NS ✓ 활성MC3403NS 개요
An operational amplifier is an analog signal-processing IC that compares an inverting input with a non-inverting input and amplifies the voltage difference between them. Operational amplifiers belong to the amplifier IC hierarchy, combining high open-loop gain, negative feedback, signal amplification, filtering, buffering, and active transducer conditioning. Their internal frequency compensation removes the need for an external dominant-pole capacitor in ordinary closed-loop applications.
The MC3403NS provides four low-power amplifiers in one package, reducing board area compared with discrete single or dual amplifier implementations. Its low input bias current is useful when the source impedance is relatively high, while short-circuit protection improves robustness in feedback-controlled circuits. The 30 V rating and wide supply range support legacy industrial systems operating from higher-voltage rails than typical modern 3.3 V or 5 V analog circuits.
Technically, each channel uses a true differential input stage and a Class AB output stage. Internal frequency compensation supports stable operation in standard closed-loop configurations, including inverting and non-inverting amplifiers. The 1 MHz gain-bandwidth product limits closed-loop bandwidth according to the selected noise gain, so higher gain reduces usable bandwidth. The wide common supply range also allows ±15 V dual-supply operation in legacy analog systems.
Typical uses include four-channel sensor conditioning, general-purpose voltage amplification, audio preamplification, active filtering, data acquisition front ends, and industrial control interfaces. Multiple independent channels can process several low-frequency signals while sharing one supply and package. Where source impedance is high, input bias current and offset characteristics should be checked before selecting the amplifier.
A primary design consideration is rail headroom. The output cannot swing fully to either supply rail, and single-supply designs must include sufficient voltage at the output for the downstream load. Place bypass capacitors close to the supply pins, keep feedback loops compact, and verify stability, output swing, and input common-mode range across temperature.
This page combines the manufacturer specifications with package guidance, practical circuit considerations, comparison criteria, and sourcing information for engineers evaluating the MC3403NS. The technical guidance emphasizes how its 30 V supply capability, 1 MHz bandwidth, four-channel integration, and 14-pin SOIC footprint affect replacement and design decisions.
드롭인 대체품: MC3403NS — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MC3403NS (동일 폼 팩터 및 풋프린트) — 차이점: Package.
MC3303DT
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →MC3404D
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MC3403NS 최대 정격 & 전기적 특성
| Number of Amplifiers | 4 circuits |
| Amplifier Type | General-purpose operational amplifier |
| Maximum Supply Voltage | 30 V |
| Single-Supply Operating Range | 3 V to 36 V |
| Gain-Bandwidth Product | 1 MHz |
| 동작 온도 범위 | -25°C to 85°C |
| 패키지 | 14-pin SOIC, 3.9 mm wide |
| Output Stage | Class AB |
| Input Stage | True differential |
| Frequency Compensation | Internal |
| Short-Circuit Protection | Supported |
| Shipping Format | Tube |
MC3403NS 핀 구성
| 핀 1 | OUT1 — Amplifier 1 output |
| 핀 2 | IN1- — Amplifier 1 inverting input |
| 핀 3 | IN1+ — Amplifier 1 non-inverting input |
| 핀 4 | V- — Negative supply connection |
| 핀 5 | IN2+ — Amplifier 2 non-inverting input |
| 핀 6 | IN2- — Amplifier 2 inverting input |
| 핀 7 | OUT2 — Amplifier 2 output |
| 핀 8 | OUT3 — Amplifier 3 output |
| 핀 9 | IN3+ — Amplifier 3 non-inverting input |
| 핀 10 | IN3- — Amplifier 3 inverting input |
| 핀 11 | V+ — Positive supply connection |
| 핀 12 | IN4- — Amplifier 4 inverting input |
| 핀 13 | IN4+ — Amplifier 4 non-inverting input |
| 핀 14 | OUT4 — Amplifier 4 output |
일반적인 애플리케이션
MC3403NS 적합 용도: 6 애플리케이션s: Industrial Sensor Conditioning, Multichannel Audio Preamplification, Data Acquisition Front Ends, Active Analog Filtering, Legacy Test and Measurement, Audio and Communication Interface Buffers.
Industrial Sensor Conditioning
The MC3403NS is appropriate for low-frequency industrial sensor-conditioning circuits requiring four channels, a 30 V supply rating, and low input bias current. Each internally compensated amplifier can buffer a sensor or implement a gain stage, allowing one package to serve several related inputs. The -25°C to 85°C operating range covers many factory environments, while the 14-pin SOIC simplifies replacement of older 14-pin general-purpose amplifier designs. Before finalizing the circuit, confirm the sensor's output voltage, source impedance, common-mode range, and required amplifier gain against the device characteristics.
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Multichannel Audio Preamplification
The four amplifiers in the MC3403NS can process separate low-frequency audio channels without requiring four separate packages. Its Class AB output stage is appropriate for modest signal-level amplification, and the 1 MHz gain-bandwidth product provides useful bandwidth for general audio preamplifier tasks. The 30 V capability also permits legacy dual-rail audio arrangements where ±15 V is preferred. The designer should confirm output swing into the next stage, verify noise performance against the signal budget, and maintain adequate output headroom to prevent clipping.
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Data Acquisition Front Ends
MC3403NS channels can provide gain and buffering ahead of an analog-to-digital converter in low-frequency acquisition systems. The 1 MHz gain-bandwidth product allows useful closed-loop bandwidth at modest gains, while internal frequency compensation simplifies conventional amplifier implementation. The low input bias current helps when driving the amplifier from a high-impedance source. For a new high-resolution design, compare input offset, noise, common-mode range, and settling behavior against the converter requirements, because the MC3403NS is a general-purpose rather than precision amplifier.
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Active Analog Filtering
The MC3403NS can implement the active gain and filtering stages required in basic analog signal-processing paths. Its 1 MHz gain-bandwidth product, internal compensation, and four independent channels allow a single package to perform several low-frequency filter functions. Opposite inputs, gain-setting resistors, and nearby bypass capacitors make the device suitable for standard RC active-filter arrangements. The practical limitation is closed-loop bandwidth: higher noise gain reduces available bandwidth and phase margin. Confirm resistor tolerances and loop stability over the intended frequency and temperature ranges.
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Legacy Test and Measurement
The MC3403NS fits legacy test and measurement equipment that uses high-voltage analog rails and general-purpose quad amplifier packages. Its 30 V rating supports ±15 V instrument circuits, while four channels can implement buffering, driver, or gain functions in one PCB footprint. The -25°C to 85°C range and short-circuit protection make it practical for bench-oriented equipment. Designers replacing older amplifier packages should verify signal amplitude, output load, input protection, and calibration requirements, especially where precision or very low distortion is expected.
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Audio and Communication Interface Buffers
The four MC3403NS channels can buffer or gain modest low-frequency signals in audio and communication interface circuits. Internal frequency compensation makes conventional non-inverting and inverting configurations straightforward, while the 1 MHz bandwidth is suitable for many control-rate or general-audio paths rather than high-speed data links. The 30 V supply rating supports legacy interface electronics, and the Class AB stage avoids push-pull crossover characteristics associated with single-ended output designs. Check noise, slew rate, capacitive-load stability, and output-current requirements before using the device as a line driver.
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추천 제품 요약
엔지니어링 참조 데이터: MC3403NS — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MC3303D | MC3404D |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOIC-14 | SOIC-14 - same package | SOIC-14 - same package |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits |
주요 차별점
- Four amplifiers with a 30 V supply rating (vs MC3303D)
- One megahertz gain-bandwidth product (vs MC3404D)
- Wide single-supply operating range (vs MC3303D)
설계 노트
Route the four amplifier channels so each feedback loop remains short and its input nodes have minimal parasitic capacitance. Place input-bias and compensation-sensitive nodes away from high-current supply paths and inductors. The shared V+ and V- pins need a low-impedance bypass path, while keeping the analog ground return compact to reduce ground-offset coupling into the amplifier inputs.
Confirm output swing and load current at the intended supply voltage and temperature before finalizing the bias network. A Class AB output does not swing exactly to either rail, particularly at high output current. For single-supply operation, establish the signal midpoint carefully and ensure downstream stages tolerate the selected common-mode range; for dual supply, verify that every transient remains within the 30 V class limit.
Do not assume that a general-purpose quad op amp is interchangeable with a modern rail-to-rail precision amplifier. Check input offset, bias current, output swing, slew rate, noise, stability with the actual capacitive load, and operating-temperature requirements. Also verify that the replacement channel mapping matches the PCB because logically similar quad-amplifier packages can assign outputs and inputs differently.
규정 준수 정보
No explicit compliance declarations were identified for MC3403NS in the referenced material. Confirm the current material and environmental declarations with Texas Instruments before using the device in regulated production.
