LM224KN - Quad 1.2 MHz Op Amp, 14-DIP | Texas Instruments
部品番号: LM224KN ✓ 生産中LM224KN 概要
An operational amplifier, or op amp, is an analog building block that amplifies the difference between two input voltages. In open-loop operation, the LM224 uses its high open-loop gain to make very small differential voltages produce a much larger output. Internal frequency compensation makes the amplifier usable as a stable voltage amplifier without external compensation components, while the four independent sections allow one package to implement four separate analog channels.
Key features include a 3 V to 32 V supply range, 1.2 MHz gain-bandwidth product, 600 uV typical input offset voltage, 0.8 mA typical supply-current drain, a common-mode input range that includes ground, and high differential input voltage capability. These characteristics suit general-purpose signal conditioning where the input can operate close to the negative supply rail. The 2 kV ESD protection rating improves handling resilience in industrial and instrumentation environments.
The LM224 architecture supports single-supply operation, allowing its positive supply pin to connect to the positive rail and its negative supply pin to connect to ground. Its common-mode range extending to ground simplifies sensing of signals referenced to the zero-volt rail without a separate mid-supply bias. As with any wide-input-range amplifier, careful grounding, supply bypassing, and output-load checks remain necessary for accurate results.
Typical uses include sensor-amplifier front ends, DC motor and actuator control loops, industrial transducers, instrumentation amplifiers, audio and communications signal conditioning, and low-frequency active filters. The four amplifiers in one DIP package reduce board area and simplify multi-channel designs where identical electrical performance is useful across several sensing or control paths.
When designing with the LM224KN, place supply-bypass capacitors close to the power pins and route sensitive input traces away from high-current switching nodes. Because the amplifier supports output currents referenced to ground, verify load and output-swing limits against the selected supply voltage and load resistance in the manufacturer datasheet.
This page consolidates verified distributor availability, pin-level package information, drop-in alternatives, comparison parameters, and practical application guidance. It highlights where the LM224KN remains a practical choice and where a lower-offset, lower-noise, or faster amplifier may be the better engineering choice.
ドロップイン代替品: LM224KN — 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: LM224KN （同一形状・フットプリント） — 相違点: Package, Gain-Bandwidth Product, Amplifier Count, Amplifier Type, Architecture.
LM224N
✅ 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 →LM2902N
✅ 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 →LM324N
✅ 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 →LM324AN
✅ 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 →LM224N
✅ 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 →LM224KN 最大定格＆電気的特性
| Number of Amplifiers | 4 |
| Number of Circuits | 4 circuits |
| Amplifier Type | General-purpose operational amplifier |
| Gain-Bandwidth Product | 1.2 MHz |
| Single Supply Voltage Range | 3 V to 32 V |
| Input Offset Voltage | 600 uV typical |
| Supply Current Drain | 0.8 mA typical |
| Common-Mode Input Voltage Range | Includes ground |
| ESD Protection | 2 kV |
| Temperature Grade | Industrial grade |
| パッケージ | 14-pin DIP (0.300 in, 7.62 mm) |
| 実装タイプ | Through-hole |
| Lead Pitch | 7.62 mm (0.300 in) |
| Supply Configuration | Single supply or split supply |
| RoHS Compliance | unknown |
LM224KN ピン構成
| ピン 1 | OUT1 — Amplifier 1 output |
| ピン 2 | IN1- — Amplifier 1 inverting input |
| ピン 3 | IN1+ — Amplifier 1 non-inverting input |
| ピン 4 | V+ — Positive supply connection |
| ピン 5 | IN2+ — Amplifier 2 non-inverting input |
| ピン 6 | IN2- — Amplifier 2 inverting input |
| ピン 7 | OUT2 — Amplifier 2 output |
| ピン 8 | OUT3 — Amplifier 3 output |
| ピン 9 | IN3- — Amplifier 3 inverting input |
| ピン 10 | IN3+ — Amplifier 3 non-inverting input |
| ピン 11 | IN4+ — Amplifier 4 non-inverting input |
| ピン 12 | IN4- — Amplifier 4 inverting input |
| ピン 13 | V- — Negative supply connection |
| ピン 14 | OUT4 — Amplifier 4 output |
主な用途
LM224KN の用途: 6 件s: Industrial Sensor Signal Conditioning, DC Motor and Actuator Control, Audio Preamplifier and Mixer, Test and Measurement Instrumentation, Communications Interface Conditioning, Active Filters and Control Loops.
Industrial Sensor Signal Conditioning
The LM224KN fits four-channel industrial sensor conditioning because each amplifier operates from a 3 V to 32 V single supply and its common-mode input range includes ground. This allows outputs from resistive, contact, or low-level transducers referenced to 0 V to be amplified without creating a mid-supply bias. Four independent 1.2 MHz amplifiers can process similar sensor channels in one 14-DIP package, reducing component count and keeping analog routing consistent. Place bypass capacitors near pins 4 and 13, and verify the selected amplifier's input-offset and common-mode limits against the full sensor-output range.
おすすめ
DC Motor and Actuator Control
The LM224KN can form the error amplifier inside a basic DC motor or actuator control loop while operating from the same rail as the controller. Its 1.2 MHz gain-bandwidth product provides adequate loop bandwidth for many low-frequency positioning and current-regulation systems, and the four amplifiers allow sensing, error amplification, and auxiliary signal conditioning to share one package. The 3 V to 32 V supply capability suits higher-voltage industrial systems. The main limitation is drive current: use the LM224KN for the high-impedance feedback path rather than driving a motor directly, and add a suitable power transistor or motor driver.
おすすめ
Audio Preamplifier and Mixer
The LM224KN can implement four low-frequency audio preamplifier, summing, or mixing stages where a general-purpose amplifier is adequate. Its 1.2 MHz gain-bandwidth product and 600 uV typical offset support voice-band and control-signal conditioning, while the 3 V to 32 V single-supply operation simplifies systems powered from a higher rail. A common single-supply arrangement requires biasing around mid-supply if the signal can be bipolar, or AC coupling if the source is centered on zero volts. For high-fidelity audio, verify noise, slew rate, and output-swing limits because the LM224KN prioritizes versatility and voltage range rather than low-noise performance.
おすすめ
Test and Measurement Instrumentation
The four independent amplifiers in the LM224KN suit laboratory and instrumentation products requiring multiple buffer, gain, or active-filter stages. Its common-mode input range extending to ground simplifies measurement interfaces referenced to the analog ground of a bench instrument, and the 1.2 MHz bandwidth is suitable for many low-frequency instrumentation paths. The through-hole 14-DIP package is also convenient for educational, prototype, and legacy control boards where manual replacement and socketed assembly are preferred. For precision measurement, check offset drift, bias current, noise density, and input capacitance in the datasheet, and use calibration where absolute accuracy is critical.
おすすめ
Communications Interface Conditioning
The LM224KN is appropriate for slow communications interfaces, relay-control logic, and line-driver receive paths that need gain or level conditioning around ground. Its input common-mode range includes ground, and its 3 V to 32 V range allows operation in 5 V, 12 V, or 24 V systems without a low-voltage-only amplifier. Four amplifiers can condition separate receive channels, monitor status lines, and provide threshold buffering in one package. Keep each amplifier's input impedance and bias-current error in mind when connecting high-impedance sources, and place bypass capacitors directly across the supply pins. Higher-bandwidth digital links require devices specifically qualified for their logic thresholds and edge rates.
おすすめ
Active Filters and Control Loops
The LM224KN can implement first- and second-order active filters and low-frequency closed-loop control blocks with up to 1.2 MHz gain-bandwidth product. Because each of the four amplifiers is internally frequency compensated and independently usable, designers can allocate sections to a low-pass filter, an integrator, an error amplifier, and a buffer within one package. Single-supply operation simplifies battery and industrial control designs, provided signal paths are biased appropriately or AC coupled. Verify capacitor tolerances, resistor noise, and the closed-loop stability margin. The same 14-DIP outline also makes it straightforward to substitute another compatible quad amplifier during laboratory validation.
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: LM224KN — 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 | LM224N | LM2902N | LM324N | LM324AN | LM224N |
|---|---|---|---|---|---|---|
| Package | 14-pin DIP (0.300 in, 7.62 mm) | 14-pin DIP (0.300 in, 7.62 mm) | 14-pin DIP (0.300 in, 7.62 mm) | 14-pin DIP (0.300 in, 7.62 mm) | 14-pin DIP (0.300 in, 7.62 mm) | 14-pin DIP (0.300 in, 7.62 mm) - NXP version |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 - NXP version |
主な差別化要因
- Four matched general-purpose amplifiers in one through-hole package （vs MC1458D)
- Wide single-supply operating range （vs LM324AN)
- Ground-referenced input capability with 2 kV ESD protection （vs NXP LM224N)
- Straightforward 14-DIP service and legacy-board compatibility （vs LM324N)
設計ノート
The LM224KN accepts a 3 V to 32 V single supply or a split supply, but the chosen operating rail still determines input common-mode range, output swing, and internal dissipation. Because one DIP contains four amplifiers, total supply demand is four times the per-amplifier current. Install a supply-bypass capacitor at each supply pin or use a compact local bypass network close to the package, and keep analog return current separate from high-current load paths. Confirm the absolute maximum supply voltage in the datasheet before adding transient suppression components.
Route the two inputs of each amplifier together and away from switching-node copper, motor windings, and relay contacts. A common-mode input range that includes ground does not remove sensitivity to electromagnetic coupling; long input traces can pick up interference that appears as an amplified output error. Place feedback resistors close to the amplifier pins and make the analog ground reference low impedance. For through-hole DIP assembly, observe the pin-1 notch or dimple orientation shown in the package diagram.
Do not use the LM224KN as a power-output driver for motors, relays, or loudspeakers. It is intended for high-impedance signal and feedback paths, and exceeding its output-current or output-swing capability can cause distortion or damage. Likewise, a 600 uV typical offset does not guarantee a particular maximum error across temperature. For precision or high-noise applications, use the worst-case datasheet limits and choose a lower-offset or lower-noise amplifier when the operating requirements justify it.
コンプライアンス情報
The verified listings identify the LM224KN as an industrial-grade general-purpose operational amplifier with 2 kV ESD protection, but they do not explicitly state RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 status. These fields therefore remain unknown rather than being assumed.
