LM324DRG4 - Quad 1.2 MHz Op Amp | Texas Instruments
部品番号: LM324DRG4 ✓ 生産中LM324DRG4 概要
An operational amplifier is an analog integrated circuit that uses high open-loop gain and negative feedback to amplify small voltage differences. Quad operational amplifiers combine four individual amplifiers into one package, reducing component count and simplifying PCB routing compared with four separate single or dual amplifier packages. The LM324 family belongs to the broader operational-amplifier, analog-amplifier, and semiconductor hierarchy and is widely positioned for cost-sensitive, general-purpose applications.
The LM324DRG4 provides four amplifier channels in one 14-SOIC package and supports operation across single- and split-supply arrangements. Its 1.2 MHz gain-bandwidth product is suitable for moderate-bandwidth signal amplification, while the internal frequency compensation simplifies closed-loop use. Because the device is intended for general-purpose work, designers should verify input common-mode range, output swing, input offset, supply current, and output-current requirements against the manufacturer datasheet for the intended application.
Four independent channels permit simultaneous signal processing without crosstalk between amplifier sections. A typical quad device can implement two differential amplifiers, four voltage followers, cascaded gain stages, sensor-conditioning channels, or a mixture of these functions. The internal compensation architecture is intended to provide stable operation in common feedback configurations, but loop gain, source impedance, capacitive loading, and output drive still require application-level validation.
Typical uses include low-frequency sensor interfaces, current-to-voltage conversion, general-purpose signal conditioning, industrial control blocks, audio preamplifier stages, and educational or prototype circuits. The single 14-SOIC package is especially useful when board area is constrained and several independent analog channels are required. It can also reduce assembly time and simplify power distribution because all four amplifier sections use the same supply pins.
Designers should confirm the exact electrical limits before finalizing a circuit. In particular, single-supply operation can constrain the usable input and output ranges, and the common-mode and output-swing boundaries must not be confused with the supply-voltage limits. Input and output stability should also be checked when driving capacitive loads or operating with unusually high source impedances.
This product record combines the manufacturer-defined device identity, package information, operating characteristics, compatible family options, application guidance, and PCB-focused design considerations. It also distinguishes documented facts from parameters that require direct confirmation in the manufacturer datasheet, helping engineers plan the LM324DRG4 for general-purpose analog designs before schematic release.
ドロップイン代替品: LM324DRG4 — 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: LM324DRG4 （同一形状・フットプリント） — 相違点: Package, Packaging, Mounting Type, Amplifier Type, Slew Rate.
LM324BAIDR
✅ 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 →LM324ADR2G
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データシートを見る →LM324DRG4 最大定格＆電気的特性
| Product Type | Quad general-purpose operational amplifier |
| Number of Amplifier Channels | 4 channels |
| Gain-Bandwidth Product | 1.2 MHz |
| パッケージ | 14-SOIC |
| ピン数 | 14 pins |
| 実装タイプ | Surface mount |
| Supply Configuration | Single supply or split supply |
| Amplifier Architecture | Independent, high-gain, frequency-compensated amplifiers |
LM324DRG4 14-soic ピン配置ガイド
LM324DRG4 (14-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: LM324DRG4.
詳細は データシート をご参照ください。
主な用途
LM324DRG4 の用途: 6 件s: Industrial Sensor Signal Conditioning, Current-to-Voltage Conversion, Audio Preamplifier Stages, Voltage Level Interface, Control-System Error Amplifiers, Educational and Prototype Circuits.
Industrial Sensor Signal Conditioning
The LM324DRG4 fits low-to-moderate-bandwidth sensor-conditioning circuits that require more than one analog channel on a compact board. Its four independent, frequency-compensated amplifiers can amplify sensor outputs, buffer high-impedance sources, or form difference stages within one 14-SOIC package. The 1.2 MHz gain-bandwidth product is well suited to many low-frequency process-control and condition-monitoring signals. Before committing to a design, confirm the LM324DRG4 input common-mode range, output swing, input offset voltage, bias current, and operating-temperature grade against the sensor interface. Sensor excitation and filtering may also require external components, so stability and accuracy should be evaluated with the actual source impedance and cable length.
Current-to-Voltage Conversion
The LM324DRG4 is useful when a sensor produces a small current that must become a voltage for an ADC or controller. Each of its four amplifier sections can implement a transimpedance stage, allowing several independent current-output sensors to share one package. The internal frequency compensation supports standard closed-loop configurations, while the 1.2 MHz gain-bandwidth product provides useful bandwidth for many process and laboratory signals. The principal design trade-off is capacitance: feedback resistance and parasitic capacitance must be selected together to maintain stability and usable bandwidth. Verify input bias current, output swing, supply range, and output-current capability in the manufacturer datasheet before using the amplifier with high-value feedback networks or precision converters.
Audio Preamplifier Stages
The LM324DRG4 can support low-frequency audio preamplifier and mixer functions where four general-purpose amplifier channels are more useful than high-speed performance. The 1.2 MHz gain-bandwidth product accommodates many voice-band, control, and instrumentation signals, and the 14-SOIC package simplifies routing four gain stages on a single board. Because the LM324DRG4 is a general-purpose amplifier, designers should examine input offset, bias current, output swing, noise, and channel-to-channel behavior against the audio sensitivity requirement. Headroom and output distortion also depend on load impedance and supply voltage. For very low-noise audio or wideband applications, evaluate a specialized low-noise amplifier instead of assuming the general-purpose LM324 family meets the full signal-chain specification.
Voltage Level Interface
The LM324DRG4 is applicable to interfaces that shift a sensor or logic-domain voltage into a range suitable for an analog input. Four independent channels allow several unidirectional level interfaces to share one 14-SOIC package, reducing board area and power-supply routing complexity. The internal frequency compensation makes ordinary non-inverting and inverting feedback networks straightforward, while the 1.2 MHz gain-bandwidth product is normally more than sufficient for low-speed control signals. Single-supply operation is convenient, but input and output headroom remain limited by the chosen supply and internal saturation behavior. Confirm common-mode limits, output swing, input offset, and supply-current requirements in the manufacturer datasheet, and test the worst-case logic levels directly at the interface pins.
Control-System Error Amplifiers
The four LM324DRG4 channels can implement error amplifiers, comparators, limiters, and feed-forward paths in general-purpose control systems. The device's four independent sections allow one channel to serve a feedback loop while other channels handle reference generation, auxiliary conditioning, or monitoring. Its 1.2 MHz gain-bandwidth product is adequate for many slow closed-loop and actuator-control systems, and the 14-SOIC package reduces component count. Control stability still depends on loop gain, phase margin, sensor lag, and actuator dynamics, so the complete loop must be simulated rather than judged from bandwidth alone. Validate common-mode range, saturation behavior, output drive, and recovery from overload for the actual power supply and load.
Educational and Prototype Circuits
The LM324DRG4 is well suited to educational prototypes, breadboard-compatible laboratory modules, and general-purpose evaluation circuits because it places four amplifier channels in a standard 14-SOIC package. A single device can demonstrate inverting and non-inverting gain, voltage following, summation, filtering, and basic feedback-control behavior without using four separate amplifier packages. The 1.2 MHz gain-bandwidth product makes it practical for many low-frequency experiments and communication-signal exercises. Its broad general-purpose role also allows students to compare open-loop and closed-loop behavior. Nevertheless, prototype planning should still respect the actual supply limits, input and output ranges, and stability rules. Include supply bypassing and use the manufacturer pin configuration to avoid wiring errors.
エンジニアリング参考データ: LM324DRG4 — 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 | LM324B | LM324A |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-SOIC | 14-SOIC | 14-SOIC |
| Number of Amplifier Channels | 4 channels | 4 channels | 4 channels |
| Internal Frequency Compensation | Yes | Yes | Yes |
主な差別化要因
- Four integrated amplifier channels （vs LM324B)
- Established original-family ordering code （vs LM324B)
- No cross-family pinout change （vs LM324A)
設計ノート
Confirm the complete input common-mode range and output swing at the intended supply voltage. A single-supply circuit may operate correctly at the rail-to-rail level while still violating the amplifier's input or output limits near either supply rail. Include startup behavior and power-supply sequencing in system tests, especially when the sensor or ADC can remain powered before the amplifier.
Place the supply bypass capacitor close to the package supply pins and provide a short, low-impedance return path to ground. Keep sensitive input and feedback traces away from switching nodes and high-current return paths. Because the four sections share common supply pins, high-current output events on one channel can create supply disturbance visible to the other channels; verify ground bounce and decoupling under the worst operating condition.
Check feedback-network stability using the actual source impedance, load capacitance, and output-current demand. The internally compensated LM324 architecture supports standard feedback configurations, but large feedback resistance can introduce bias-current error and extra capacitance can reduce bandwidth or cause oscillation. Add an isolation resistor between the amplifier and unusually capacitive loads when the application and stability analysis require it.
Do not interpret the 1.2 MHz gain-bandwidth product as a guaranteed 1.2 MHz closed-loop bandwidth at every gain setting. Actual bandwidth depends on noise gain, internal compensation, load, and process behavior. Likewise, a quad package does not imply four identical outputs: each channel must satisfy its own input, output, and stability limits under the selected supply and load conditions.
コンプライアンス情報
RoHS and REACH are mentioned in a component-comparison listing, but the target's compliance status is not explicitly stated. No qualification or material-compliance claim should be inferred.