LM224PT - Quad 1.3MHz Op Amp | STMicroelectronics
部品番号: LM224PT ✓ 生産中LM224PT 概要
An operational amplifier is an analog integrated circuit that compares an inverting input with a non-inverting input and drives its output toward the difference between them, multiplied by a very high open-loop gain. In the signal-chain hierarchy, the LM224PT belongs to the operational-amplifier class, then to the broader amplifier IC and analog signal-conditioning categories. Its internally compensated architecture simplifies use in voltage followers, buffers, transimpedance stages, differential amplifiers, comparators, and basic control loops.
Key characteristics include four independent amplifiers, a 1.3 MHz gain-bandwidth product, a 0.4 V/µs slew rate, low input bias current, and operation from a broad single supply. These characteristics make the part suitable for industrial control, sensor interfaces, audio preamplification, and low-frequency analog systems. Internal frequency compensation removes the need for an external compensation network in ordinary closed-loop applications.
The wide operating-voltage range allows one device family to serve 5 V, 12 V, 15 V, 24 V, and ±15 V systems when the circuit and output-swing limits permit. As a low-power general-purpose amplifier, it prioritizes supply flexibility, moderate bandwidth, and low input bias current rather than rail-to-rail operation, high slew rate, or low-noise precision performance. Designers should check input common-mode range, output swing, input differential voltage, and supply-current limits against the actual circuit.
Typical applications include buffering sensor outputs, amplifying low-frequency control signals, conditioning potentiometer inputs, driving analog stages in industrial equipment, and implementing general feedback control. The four-channel configuration can reduce the number of packages in multichannel analog boards while preserving independent operation and grounding flexibility.
Layout should keep input and feedback traces short, place input-biasing components close to their pins, and maintain a quiet return path to minimize parasitic pickup. Decoupling capacitors should be placed at the supply pins, while unused amplifier channels should be configured in a stable state rather than left floating.
This page combines the manufacturer-device identity, package information, operating characteristics, drop-in replacement research, and application-specific design guidance. It is intended to help engineers evaluate LM224PT quickly, compare it with compatible devices, and implement it correctly without treating a general-purpose amplifier as a precision or rail-to-rail part.
ドロップイン代替品: LM224PT — 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。
LM2902PT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LM224PT 最大定格＆電気的特性
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Amplifiers | 4 independent amplifiers |
| Gain-Bandwidth Product | 1.3 MHz |
| Slew Rate | 0.4 V/µs |
| Single-Supply Operating Voltage | 3 V to 30 V |
| Split-Supply Operating Voltage | Up to ±15 V |
| Frequency Compensation | Internally frequency compensated |
| パッケージ | 14-TSSOP |
| 実装タイプ | Surface mount |
LM224PT 14-tssop ピン配置ガイド
LM224PT (14-tssop 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: LM224PT.
詳細は データシート をご参照ください。
主な用途
LM224PT の用途: 6 件s: Industrial Sensor Signal Conditioning, Temperature and Pressure Measurement, Audio Preamplification, General Feedback Control Loops, Potentiometer and Divider Interfaces, Analog Instrumentation.
Industrial Sensor Signal Conditioning
The LM224PT fits low-frequency industrial sensor conditioning because each of its four internally compensated amplifiers can amplify a sensor output while operating from a broad 3 V to 30 V single-supply range. A 1.3 MHz gain-bandwidth product supports useful closed-loop bandwidth at moderate gains, and the stated low input bias current is advantageous when driving resistive dividers or high-impedance sensing networks. Place the amplifier close to the sensor connector, keep input traces short, and verify the input common-mode range against the sensor’s output swing.
おすすめ
Temperature and Pressure Measurement
LM224PT is appropriate for conditioning resistive temperature or pressure elements when the required signal bandwidth is modest. The four independent channels can process several sensing inputs, while the 1.3 MHz gain-bandwidth product and 0.4 V/µs slew rate provide useful response for filtered, slow-changing measurements. Its low input bias current helps reduce error with high-resistance sensor networks. Design the amplifier around the sensor excitation level, keep the input offset and bias requirements in view, and include filtering where noise or sensor response could otherwise dominate the useful signal.
おすすめ
Audio Preamplification
LM224PT can provide modest audio preamplification in equipment that does not require rail-to-rail operation or very low noise. Its four-amplifier arrangement supports independent stereo and monitoring channels, while the 1.3 MHz gain-bandwidth product covers audio-band signals with reasonable margin. The 0.4 V/µs slew rate is sufficient for many conventional audio paths, although distortion and output swing depend on frequency, gain, load, and supply voltage. Use the manufacturer datasheet to confirm output capability and provide stable feedback compensation for the selected closed-loop gain.
おすすめ
General Feedback Control Loops
The LM224PT is well matched to general-purpose feedback control because its internally compensated amplifiers simplify stable loop design. A 1.3 MHz gain-bandwidth product and 0.4 V/µs slew rate can support low-bandwidth plant-control loops, while the wide supply range permits operation from industrial and split rails. Use the amplifier section of the manufacturer datasheet to select a closed-loop gain and feedback network, then evaluate phase margin in the actual system. Avoid using the LM224PT where precision offset, very low noise, or fast settling is essential.
おすすめ
Potentiometer and Divider Interfaces
LM224PT is useful as a voltage buffer or gain stage for potentiometer and resistive-divider inputs. Its low input bias current reduces loading of high-resistance dividers, and the four independent channels allow several controls or references to share one package. The amplifier must remain within its input common-mode range, which depends on the supply and output level, so a ±15 V split supply may be more useful than a restricted single rail in some designs. Add a small feedback or bias resistor at unused amplifier inputs to prevent unstable operation.
おすすめ
Analog Instrumentation
LM224PT suits laboratory and process-instrumentation modules requiring several low-frequency analog channels in one package. Four independent amplifiers can implement buffers, subtractors, active filters, and programmable-gain stages around sensors or converters. Its 3 V to 30 V supply range supports multiple laboratory rail arrangements, and the internal frequency compensation removes external compensation from ordinary feedback stages. Keep the layout compact, route high-impedance input nodes away from switching nodes, and validate each channel’s offset, bias, output swing, and stability against the measurement accuracy required by the instrument.
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: LM224PT — 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 | LM2902PT |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Package | 14-TSSOP | 14-TSSOP |
| Number of Amplifiers | 4 | 4 |
| Amplifier Type | General-purpose low-power operational amplifier | General-purpose low-power operational amplifier |
| Gain-Bandwidth Product | 1.3 MHz | 1.3 MHz |
| Frequency Compensation | Internal | Internal |
| Primary Positioning | Low-power general-purpose amplifier with low input bias current | Low-power amplifier for industrial control systems |
主な差別化要因
- Four independently usable amplifiers in one compact package （vs LM2902PT)
- General-purpose operation with broad single-supply flexibility （vs LM2902PT)
- Matched 1.3 MHz bandwidth and 14-TSSOP footprint （vs LM2902PT)
設計ノート
Decouple the LM224PT supply pins with a local bypass capacitor and place it directly adjacent to the package power and ground pins. The device accepts a broad 3 V to 30 V single-supply range, but that rating does not guarantee the same input or output swing at every supply voltage. Confirm output swing, input common-mode range, and channel stability for the lowest and highest operating voltages before releasing the layout.
Keep each non-inverting input, feedback component, and resistor network close to the corresponding amplifier channel. Avoid routing these nodes beneath switching supplies or digital return paths because the 1.3 MHz device can pick up interference even when its intended signal bandwidth is lower. A solid ground plane and short ground returns will generally provide more predictable behavior than long, shared return traces.
Do not assume that the full supply range is also the input common-mode or output-swing range. Check the LM224PT datasheet against the chosen single or split supply and the required signal amplitude. Also configure unused amplifier channels as stable voltage followers or amplifiers tied to an appropriate reference; leaving high-impedance inputs floating can produce oscillation and interfere with active channels.
For sensor or high-impedance sources, evaluate the complete input-bias-current error against the source impedance and include cable leakage or contamination in the noise budget. Keep input traces short and use guarding where appropriate. If the circuit drives a capacitive load, add isolation resistance and verify stability using the manufacturer’s load-capability guidance rather than relying on nominal bandwidth alone.
コンプライアンス情報
The cited product pages identify LM224PT as a general-purpose 14-TSSOP operational amplifier but do not state extractable compliance values. Automotive qualification is not indicated for this ordering code.