MC33201D - 12V Rail-to-Rail Operational Amplifier | onsemi
部品番号: MC33201D ✓ 生産中MC33201D 概要
A rail-to-rail operational amplifier is an analog signal-conditioning amplifier whose input common-mode range and output voltage range extend close to the positive and negative supply rails. In the broader semiconductor hierarchy, an operational amplifier belongs to the amplifier IC and analog signal-processing categories. It can amplify sensor signals, buffer high-impedance sources, compare voltages, or integrate feedback networks around a single analog signal path.
The MC33201D combines rail-to-rail input operation with low-noise, high-output-drive characteristics. Its input stage accepts common-mode signals beyond the nominal supply rails by as much as 200 mV without reversing the output polarity. Its output stage can approach each supply rail within 50 mV, improving usable output swing in low-voltage systems where conventional fixed-range amplifiers leave little headroom.
The device is designed for low-voltage analog systems in which common-mode and output range are more important than using a larger, higher-voltage amplifier. Rail-to-rail behavior is particularly useful when a sensor output can move close to a low supply rail, when an ADC or DAC must be driven near the end of its input range, or when a bipolar signal must be handled with a single positive supply. The manufacturer documentation identifies the MC33201, MC33202, MC33204, NCV33201, NCV33202, and NCV33204 as members of the same operational-amplifier family.
Typical uses include portable instrumentation, sensor interfaces, low-voltage audio paths, ADC input conditioning, current monitoring, and general-purpose signal amplification. In each case, the designer should verify input bias current, offset voltage, bandwidth, output-current capability, noise, stability, and operating-temperature limits against the manufacturer datasheet before fixing the circuit.
The most important design consideration is to preserve the amplifier's stability and rail-to-rail performance. Keep feedback components close to the device, avoid excessive capacitive loading on the output, and account for common-mode behavior in the region where the input stage transitions between internal transistors. Decoupling capacitors should be connected directly between each supply pin and the appropriate ground reference.
This product record combines the manufacturer family information with package, function, commercial, comparison, and application guidance. It also identifies same-footprint family options for designs that can tolerate their different input-offset characteristics, while making clear that final substitution requires electrical verification in the target circuit.
ドロップイン代替品: MC33201D — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC33201D （同一形状・フットプリント） — 相違点: Amplifier Type, Output Swing.
MC33202D
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →MC33204D
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
NCV33201D
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC33201D 最大定格＆電気的特性
| Amplifier Type | Single-circuit operational amplifier |
| Input Type | Rail-to-rail input |
| 出力タイプ | Rail-to-rail output |
| Maximum Supply Voltage | 12 V |
| Common-Mode Input Overdrive | 200 mV beyond either supply rail |
| Output Swing | Within 50 mV of each supply rail |
| パッケージ | 8-pin SOIC |
| 実装タイプ | Surface mount |
MC33201D ピン構成
| ピン 1 | NC — Not connected |
| ピン 2 | IN- — Inverting input |
| ピン 3 | IN+ — Non-inverting input |
| ピン 4 | V- — Negative supply voltage |
| ピン 5 | NC — Not connected |
| ピン 6 | OUT — Amplifier output |
| ピン 7 | V+ — Positive supply voltage |
| ピン 8 | NC — Not connected |
主な用途
MC33201D の用途: 6 件s: Low-Voltage Sensor Signal Conditioning, ADC Input Driver, Portable Instrumentation Signal Amplifier, Low-Voltage Audio Buffer, Threshold and Comparator Circuit, Current and Voltage Monitoring.
Low-Voltage Sensor Signal Conditioning
The MC33201D fits sensor-interface circuits whose signals can approach either supply rail because its input common-mode range extends 200 mV beyond the rails without phase reversal. Place the amplifier close to the sensor or connector to minimize interference pickup, and use its rail-to-rail output to preserve more of the available signal range in a 12 V-class system. Output swing within 50 mV of each rail provides additional headroom when driving a downstream ADC or logic input. Verify the sensor’s source impedance, bias current, required offset accuracy, and the amplifier’s noise and stability before finalizing the gain network.
おすすめ
ADC Input Driver
The MC33201D can provide a low-voltage drive stage between a sensor or analog front end and an ADC input. Its rail-to-rail input accepts signals extending 200 mV beyond the supply rails, while the output can move to within 50 mV of either rail, helping use nearly the full ADC input span. The 8-pin SOIC package is suitable for compact analog layouts. Confirm ADC input capacitance, settling requirements, gain-bandwidth product, and output-current capability in the manufacturer datasheet before selecting compensation and series-resistance values.
おすすめ
Portable Instrumentation Signal Amplifier
The MC33201D is appropriate for compact instrumentation that uses a low supply voltage and needs to amplify signals near the supply limits. Inputs may extend 200 mV beyond the rails without phase reversal, and the output can approach either rail within 50 mV, improving measurement utilization in portable equipment. The single amplifier in an 8-pin SOIC simplifies board area and supports conventional dual-supply or single-supply layouts. Check offset voltage, input bias current, noise, and temperature drift against the measurement resolution required by the instrument.
おすすめ
Low-Voltage Audio Buffer
The MC33201D can buffer a low-level audio or communications signal when the available supply voltage is limited and the signal approaches the rails. The manufacturer documents input overdrive of 200 mV beyond the supply rails without output phase reversal, which helps preserve waveform polarity, and output swing within 50 mV of each rail. This behavior is useful for single-supply headphone, microphone, or line-level blocks that require more range than a fixed common-mode amplifier. Validate output-current capability, slew rate, noise, and stability into the selected load before production use.
おすすめ
Threshold and Comparator Circuit
The MC33201D can implement a threshold detector when feedback and positive feedback are used to create hysteresis around a reference voltage. Its rail-to-rail input behavior allows the compared signal to approach the supply limits, while the output can swing within 50 mV of either rail to provide useful logic-level drive for the next stage. The 8-pin SOIC package supports straightforward routing of the inverting, non-inverting, supply, and output pins. Confirm input offset, input bias effects, output saturation, and noise immunity before using it where precision or fast switching is required.
おすすめ
Current and Voltage Monitoring
The MC33201D can amplify a scaled voltage from a current or power-monitoring circuit before it reaches an ADC, DAC, or controller. Rail-to-rail input operation accepts common-mode signals up to 200 mV beyond the rails without reversing the output, while output swing within 50 mV of each rail improves resolution in a compact 12 V-class design. Place the amplifier and feedback network near the sensing node to reduce pickup, and confirm that input bias current does not disturb the sensor. Offset and drift specifications should be checked against the smallest monitoring threshold.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC33201D — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC33202D | MC33204D | NCV33201D |
|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi |
| Package | 8-SOIC | 8-SOIC - same package | 8-SOIC - same package | 8-SOIC - same package |
| Amplifier Configuration | Single amplifier | Single amplifier | Single amplifier | Single amplifier |
| Input Type | Rail-to-rail | Rail-to-rail | Rail-to-rail | Rail-to-rail |
| Output Type | Rail-to-rail | Rail-to-rail | Rail-to-rail | Rail-to-rail |
| Maximum Supply Voltage | 12 V | 12 V | 12 V | 12 V |
| Input Overdrive Beyond Rails | 200 mV | 200 mV | 200 mV | 200 mV |
| Output Distance From Rails | 50 mV | 50 mV | 50 mV | 50 mV |
主な差別化要因
- Standard-family choice with rail-to-rail input and output operation （vs MC33202D)
- Different offset-grade option in the same SOIC footprint （vs MC33204D)
- Standard and NCV family designations within one footprint （vs NCV33201D)
設計ノート
Connect the supply bypass capacitor directly between pin 7, V+, and the ground reference, and place the negative-supply bypass capacitor between pin 4, V-, and its reference when using a split supply. Keep the feedback network close to pins 2 and 3 to minimize parasitic feedback and high-frequency noise pickup. The 8-pin SOIC footprint requires careful routing of the input and output nets because they are physically separated by the supply pins.
Account for the amplifier’s input common-mode behavior when the source can approach or exceed a supply rail. The manufacturer states that inputs may be driven 200 mV beyond the rails without output phase reversal, but designers should still confirm input current, protection, and absolute maximum limits in the operating state. Output swing can approach within 50 mV of each rail, so downstream logic thresholds should include that residual margin.
Do not treat rail-to-rail operation as an unlimited input range. The amplifier is intended for a low-voltage, 12 V-class environment, and excessive input voltage, output loading, or incorrect feedback topology can invalidate normal operation. Use the manufacturer pin-description table when assigning tracks, and verify offset voltage, bias current, bandwidth, noise, slew rate, and output-current requirements before approving a production design.
コンプライアンス情報
The manufacturer family documentation identifies NCV33201 as a distinct family option, but explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements were not established for MC33201D.