MC3303DT - 1MHz Low-Power Quad Op Amp | STMicroelectronics
料号： MC3303DT ✓ 量产中MC3303DT 概述
An operational amplifier is a voltage-gain element that compares its inverting and non-inverting inputs and drives its output toward a voltage representing the difference between them. The quad configuration belongs to the operational-amplifier family within analog integrated circuits and amplifier ICs. MC3303DT provides four independent amplifiers in one package, reducing board area compared with four single or dual amplifier packages when a system requires four similar signal-processing channels.
The principal features include a 1 MHz gain-bandwidth product, operation from 3 V to 36 V, low input bias current of 500 nA maximum, internal frequency compensation, and short-circuit-protected outputs. Its Class AB output stage is intended to provide a practical compromise between output drive capability and power dissipation compared with a pure Class A stage. The low-power operating point makes the device suitable for industrial control, instrumentation, sensor interfaces, and general analog signal-conditioning systems.
MC3303DT differs from the closely related UA741-family architecture through its improved suitability for single-supply operation. It accepts a positive supply as high as 36 V or dual supplies of ±18 V, allowing operation from industrial 24 V rails when the total supply and input/output signal limits are observed. Internally compensated amplifiers simplify closed-loop gain selections when unity-gain stability is appropriate for the selected circuit and load.
Typical uses include four-channel sensor amplification, differential input conditioning, active filtering, comparator-style threshold functions, and general instrumentation. The four amplifiers may also process separate channels or be combined in wider-bandwidth or higher-gain configurations where the resulting feedback network remains stable. Designers should account for input common-mode range, output swing, noise, and load capability at their intended supply voltage.
A key design consideration is power: each amplifier contributes to total quiescent current, so four channels require more supply current than one or two channels. Input and output stability should be verified with the intended source impedance, load, supply decoupling, and feedback network. Input and output pin functions are published in the manufacturer datasheet, which should be checked against the final 14-pin PCB footprint.
This page combines verified distributor data, manufacturer-document references, application guidance, package details, and same-footprint replacement considerations. It also identifies where current sourcing information remains unavailable so engineers can distinguish documented facts from data requiring confirmation before production release.
直接替换替代料： MC3303DT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC3303DT （相同外形与封装尺寸） ——差异在于 Mounting Type, Package.
MC3303D
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC3403D
✅ 直接替换联系询价
查看数据手册 →MC3303DT 最大额定值与电气特性
| Amplifier Count | 4 amplifiers |
| Gain-Bandwidth Product | 1 MHz |
| Single-Supply Operating Voltage | +3 V to +36 V |
| Dual-Supply Operating Voltage | ±18 V |
| Maximum Input Bias Current | 500 nA |
| Input Configuration | True differential inputs |
| Compensation | Internally compensated |
| Output Stage | Class AB |
| Output Protection | Short-circuit protected |
| Process Technology | Bipolar |
| 封装 | 14-pin SO |
| 安装类型 | Surface mount |
| Product Classification | General-purpose amplifier |
MC3303DT 引脚配置
| 引脚 1 | OUT1 — Amplifier 1 output |
| 引脚 2 | IN1- — Amplifier 1 inverting input |
| 引脚 3 | IN1+ — Amplifier 1 non-inverting input |
| 引脚 4 | V- — Negative supply connection |
| 引脚 5 | IN2+ — Amplifier 2 non-inverting input |
| 引脚 6 | IN2- — Amplifier 2 inverting input |
| 引脚 7 | OUT2 — Amplifier 2 output |
| 引脚 8 | OUT3 — Amplifier 3 output |
| 引脚 9 | IN3- — Amplifier 3 inverting input |
| 引脚 10 | IN3+ — Amplifier 3 non-inverting input |
| 引脚 11 | V+ — Positive supply connection |
| 引脚 12 | IN4+ — Amplifier 4 non-inverting input |
| 引脚 13 | IN4- — Amplifier 4 inverting input |
| 引脚 14 | OUT4 — Amplifier 4 output |
典型应用
MC3303DT 适用于 6 应用s: Industrial Sensor Signal Conditioning, Power Supply Current Monitoring, Active Audio and Control Filtering, Data Acquisition Front End, Process Control and Automation, Battery-Powered Portable Instrumentation.
Industrial Sensor Signal Conditioning
MC3303DT is appropriate for four-channel industrial sensor conditioning because it combines true differential inputs with operation from 3 V to 36 V using a single supply. Each amplifier can amplify a transducer signal when its output remains within the common-mode and output-swing limits. Its 1 MHz gain-bandwidth product is sufficient for many temperature, pressure, and level sensors rather than high-bandwidth measurement systems. The internally compensated architecture simplifies feedback design, while short-circuit-protected Class AB outputs improve robustness. Engineers should verify the input offset, bias current, noise, and common-mode range for the selected sensor and filter before production.
推荐
Power Supply Current Monitoring
MC3303DT can support current and voltage monitoring in industrial power systems because four amplifiers provide separate channels for sensing, scaling, filtering, and buffering. The +36 V single-supply capability allows direct interface to suitably protected 24 V industrial rails when the amplifier input and output ranges are observed. The 500 nA maximum input bias current is useful for high-impedance sensing networks, while the 1 MHz gain-bandwidth product accommodates many slow feedback networks. Protection, isolation, resistor ratings, and transient filtering remain the designer's responsibility.
推荐
Active Audio and Control Filtering
MC3303DT can implement active filters or general audio-frequency control blocks because each channel has a 1 MHz gain-bandwidth product and internal compensation. Four independent amplifiers allow designers to distribute filtering, gain, summing, or threshold functions across a compact circuit. The Class AB output stage provides a practical drive compromise for moderate loads, but output swing and capacitive-load stability must be checked against the manufacturer limits. The device is better suited to low-bandwidth instrumentation and control than to high-fidelity audio paths requiring very low distortion.
推荐
Data Acquisition Front End
MC3303DT is useful in a multi-channel data-acquisition front end when four signals require buffering or modest differential amplification before conversion. True differential inputs help reject common-mode noise, and the 500 nA maximum input bias current reduces loading of high-source-impedance sensors. Its 1 MHz bandwidth supports moderate-frequency measurement channels, while internally compensated operation reduces the number of external stability components. Precise converter applications still require offset, drift, noise, settling-time, and input-range checks against the ADC being used.
推荐
Process Control and Automation
MC3303DT fits process-control modules that need several low-power analog channels around an embedded controller. The four-amplifier arrangement can condition inputs, amplify error signals, and buffer actuator-control outputs in one 14-pin SO package. Operation from 3 V to 36 V supports both compact low-voltage logic and higher-voltage industrial interfaces, subject to signal-range limits. Short-circuit protection and internally compensated channels aid practical implementation, but loop stability, grounding, calibration, and fail-safe behavior must be validated at system level.
推荐
Battery-Powered Portable Instrumentation
MC3303DT can serve in portable or battery-operated instrumentation where a low-power quad operational amplifier reduces the number of packages needed for multiple analog channels. The low-power 3 V minimum supply supports compact mixed-signal systems, and the short-circuit-protected outputs improve robustness in field equipment. Its 1 MHz gain-bandwidth product is sufficient for many sensor, threshold, and buffering functions. Actual battery life depends on total quiescent current, load, supply voltage, duty cycle, and shutdown strategy, all of which must be calculated for the finished instrument.
推荐
推荐产品汇总
工程参考数据： MC3303DT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC3303D | MC3403D | MC3403 | MC3303 |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | TI |
| Package | 14-pin SO | 14-pin SO | 14-pin SO | 14-pin SO | 14-pin SO |
关键差异点
- Lower-power ST family positioning （对比 MC3403D)
- Wide single-supply operating capability （对比 MC3403D)
- Four integrated general-purpose channels （对比 MC3303)
设计说明
Calculate the total supply demand from all four amplifiers before selecting the source. The verified data identifies MC3303DT as a low-power device but does not provide a numerical quiescent-current value, so obtain that value from the manufacturer datasheet and include output-load current in the design. Confirm that the selected supply remains within +3 V to +36 V and that the input/output signal limits are satisfied at the actual rail voltage.
Place the 14-pin SO footprint in accordance with the manufacturer land pattern and verify the pin-1 orientation against the package marking. Route each sensitive input directly to its amplifier pin and keep feedback components close to the relevant channel. The four sections share the supply pins, so adequate decoupling and uninterrupted ground return paths are important for preventing supply noise from appearing independently on all four outputs.
Do not assume that a similarly packaged amplifier is an exact replacement. MC3303DT's key stated ratings include 1 MHz gain-bandwidth product, 500 nA maximum input bias current, true differential inputs, and operation from +3 V to +36 V. For MC3403D, MC3403, or MC3303 alternatives, check offset voltage, input common-mode range, output swing, slew rate, supply current, noise, and stability with the actual feedback network and load.
Validate the feedback network against the 1 MHz gain-bandwidth product and the selected closed-loop gain. Internally compensated operation simplifies many voltage-follower and moderate-gain configurations, but source impedance, load capacitance, supply impedance, and probe capacitance can still affect stability or settling. At industrial signal levels, use grounded guarding or shielding where needed and keep high-impedance input nodes physically short and away from switching nodes.
合规信息
The supplied distributor and manufacturer-document results did not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred from general distributor listings.
