MC33174D - Low-Power Quad Bipolar Op Amp | STMicroelectronics
部品番号: MC33174D ✓ 生産中MC33174D 概要
An operational amplifier, or op amp, is a high-gain analog building block used to amplify, buffer, filter, compare, and control voltage signals. MC33174D belongs to the broader amplifier IC, analog IC, and semiconductor hierarchies. Unlike an amplifier built around JFET input devices, this bipolar implementation combines low supply consumption with useful low-frequency bandwidth and slew performance for general-purpose analog signal conditioning.
The four amplifiers provide flexible circuit partitioning for industrial instrumentation, sensor interfaces, active filters, and control loops. Key characteristics include 200 uA supply current per amplifier, 2.1 MHz gain-bandwidth product, and 2 V/us slew rate. The input common-mode range reaches the lower supply rail, which simplifies designs powered from a single positive rail while the signal approaches the lower operating limit.
Operation from +4 V to +44 V gives the device broad supply-voltage flexibility. The 14-pin SOIC package supports conventional surface-mount assembly, while the quad channel count consolidates four amplifiers into one component. The manufacturer datasheet identifies the MC3x174 family as low-power bipolar operational amplifiers that combine low consumption with improved speed compared with basic general-purpose bipolar alternatives.
Typical uses include low-side current sensing, buffered sensor outputs, precision signal conditioning, sample-and-hold circuits, active filters, and low-frequency control loops. The extended lower-rail common-mode capability is particularly valuable when a measurement begins near ground and the circuit has only one positive supply. Split-supply operation remains possible where bipolar signals or output swing are required.
Designers should verify input and output voltage limits, common-mode range, output-load capability, and stability requirements against the manufacturer datasheet for the operating condition. Decoupling capacitors should be placed close to the supply pins, and each amplifier stage should be checked for output saturation during startup and overload transients.
This page organizes the MC33174D specifications, package information, verified sourcing context, drop-in alternatives, comparison parameters, and application guidance into one engineering-focused reference. It also identifies the limits of the available cross-reference information so replacement decisions can be made without treating merely similar amplifier families as confirmed drop-in devices.
ドロップイン代替品: MC33174D — 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。
MC33174DG
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC33174D
✅ ドロップイン価格はお問い合わせください
データシートを見る →MC33174D 最大定格＆電気的特性
| Amplifier Type | Quad general-purpose bipolar operational amplifier |
| Number of Amplifiers | 4 channels |
| Supply Voltage Range, Single | +4 V to +44 V |
| Supply Current per Amplifier | 200 uA |
| Gain-Bandwidth Product | 2.1 MHz |
| Slew Rate | 2 V/us |
| Input Common-Mode Range | Extends to the lower supply rail |
| Input Transistor Technology | Bipolar |
| Single-Supply Operation | Supported |
| Split-Supply Operation | Supported |
| パッケージ | 14-pin SOIC |
| 実装タイプ | Surface mount |
MC33174D 14-pin soic ピン配置ガイド
MC33174D (14-pin soic パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: MC33174D.
詳細は データシート をご参照ください。
主な用途
MC33174D の用途: 6 件s: Low-Side Current Sensing, Industrial Sensor Signal Conditioning, Active Low-Pass Filtering, Audio and Communication Buffers, Battery-Powered Monitoring, Precision Control Loops.
Low-Side Current Sensing
MC33174D fits low-side shunt sensing because its input common-mode range extends to the lower supply rail, allowing a small measurement voltage near ground to be amplified on a single positive supply. With 200 uA supply current per amplifier and 2.1 MHz gain-bandwidth product, it can condition the shunt signal while keeping system power low. The 2 V/us slew rate also supports moderate-amplitude dynamic signals. Design the gain around the shunt resistance and measured current, then verify input offset voltage, bias-current effects, common-mode limits, and output swing against the manufacturer datasheet.
おすすめ
Industrial Sensor Signal Conditioning
MC33174D is appropriate for buffering and scaling outputs from industrial sensors that operate close to the lower supply rail. Its input common-mode capability reaches the lower rail, while the 200 uA per-amplifier supply current is useful in distributed measurement systems where each channel consumes limited power. The 2.1 MHz gain-bandwidth product provides more bandwidth than a basic slow precision amplifier, and the 2 V/us slew rate can reproduce moderate-frequency waveforms. Separate amplifier sections can serve sensor inputs, filtering stages, and output drivers while maintaining a common 14-pin SOIC footprint.
おすすめ
Active Low-Pass Filtering
MC33174D can implement active low-pass filters where moderate bandwidth, low supply current, and rail-adjacent input capability are useful together. Its 2.1 MHz gain-bandwidth product allows practical op-amp closed-loop operation well above audio-baseband frequencies, while 2 V/us slew rate helps preserve low-frequency square-wave and transient behavior. The four channels allow a two-stage filter, a buffered filter, or independent signal paths. Component tolerances and amplifier noise still determine the realized cutoff and attenuation, so calculate resistor and capacitor values with the required gain-bandwidth and stability margins in mind.
おすすめ
Audio and Communication Buffers
MC33174D is suitable for general-purpose audio and communication buffering when low power and single-supply operation are priorities. Four amplifier channels can support source buffering, gain stages, and output isolation without using four separate packages. The 2.1 MHz gain-bandwidth product covers voice-band and many low-frequency control-signal paths, while the 2 V/us slew rate provides useful transient capability. The bipolar architecture and lower-rail input range can simplify ground-referenced conditioning, but the application must stay within the device's output-swing and load-drive limits. Confirm distortion, noise, and stability requirements using the manufacturer's test conditions.
おすすめ
Battery-Powered Monitoring
MC33174D can support low-power monitoring electronics when the monitored signal is compatible with a +4 V to +44 V single-supply environment. Its 200 uA supply current per amplifier limits the amplifier contribution to system power, while four channels consolidate multiple monitoring functions into one 14-pin SOIC device. The lower-rail-referenced input capability is valuable for battery-current, voltage, and ground-referenced sensor measurements. Select an appropriate battery voltage, maintain enough headroom for the amplifier and downstream circuitry, and account for reverse-battery protection, startup behavior, input protection, and total system quiescent current.
おすすめ
Precision Control Loops
MC33174D can serve in low-frequency control loops that require more bandwidth and slew capability than a very slow drift-oriented amplifier. The 2.1 MHz gain-bandwidth product and 2 V/us slew rate support proportional, integral, or general feedback stages operating below the amplifier's practical bandwidth limit. Its 200 uA supply current per amplifier reduces overhead when four control or feedback channels are required. Use the lower-rail common-mode range to simplify actuator or sensor feedback near ground, but preserve noise and offset margin around the operating point. Validate loop stability, capacitive loading, and output drive against the specific control network.
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: MC33174D — 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 | MC33174DG | MC33174D |
|---|---|---|---|
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Brand | STMicroelectronics | onsemi | onsemi |
| Amplifier Configuration | Quad | Quad | Quad |
| Input Transistor Technology | Bipolar | Bipolar | Bipolar |
| Supply Current per Amplifier | 200 uA | 200 uA | 200 uA |
| Gain-Bandwidth Product | 2.1 MHz | 2.1 MHz | 2.1 MHz |
| Slew Rate | 2 V/us | 2 V/us | 2 V/us |
| Single-Supply Voltage Range | +4 V to +44 V | +4 V to +44 V | +4 V to +44 V |
| Input Common-Mode Range | Extends to the lower supply rail | Extends to the lower supply rail | Extends to the lower supply rail |
主な差別化要因
- Combines four amplifier channels with low per-channel supply current （vs MC33174DG)
- Provides sufficient bandwidth for general-purpose low-frequency signal conditioning （vs MC33174D)
- Supports ground-referenced inputs on a single positive supply （vs MC33174DG)
設計ノート
Use separate input and output bypassing, with low-ESR ceramic capacitors placed close to the supply pins and ground return. Keep the high-frequency return path compact to limit trace inductance. Account for the stated 200 uA per-amplifier supply current when estimating total amplifier demand, and calculate worst-case dissipation from the actual supply voltage, output voltage, and channel load rather than using the idle current alone.
Do not assume that an input can move beyond the specified common-mode range merely because the range approaches the lower supply rail. Check the exact input and output limits for the selected supply voltage and temperature. Also avoid driving a capacitive load without evaluating stability; output isolation or a small isolation resistor may be required near the stability limit.
Keep analog input and feedback traces short, isolate them from switching nodes and high-current return paths, and connect bypass-capacitor returns directly to the relevant ground pins. The 2.1 MHz gain-bandwidth product allows layouts that must still minimize parasitic coupling because excessive input capacitance can alter frequency response or stability. Follow the manufacturer layout example when reproducing the recommended application circuit.
The 2 V/us slew rate is appropriate for low-frequency signal-conditioning paths, but it does not remove the need to control bandwidth. Evaluate closed-loop gain, expected load, and capacitor loading together. For precision measurement channels, include input offset and bias-current effects in the error budget even when the nominal 2.1 MHz bandwidth appears sufficient.
コンプライアンス情報
The manufacturer datasheet states that STMicroelectronics products are not authorized for use as critical components in life-support devices or systems without express written approval. RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-mineral status require confirmation from current manufacturer documentation.
