LM224DG - 4-Channel 1 MHz Op Amp | onsemi | Industrial Control
MPN： LM224DG ✓ 啟用中LM224DG 概覽
An operational amplifier is a high-gain differential-input amplifier commonly used to buffer sensors, amplify small signals, implement active filters, and drive higher-impedance loads. The LM224 belongs to the operational-amplifier hierarchy, which includes voltage-feedback amplifiers and is used within analog signal-chain and power-management systems. Its four channels can be used independently when the required circuit functions do not interfere.
Key verified features include four amplifier circuits, a 1 MHz gain-bandwidth product, a 3 V to 32 V operating supply range, true differential inputs, and a minimum common-mode rejection ratio of 70 dB. The listed input-offset voltage is 5 mV. These characteristics make the LM224DG appropriate for general-purpose signal conditioning where a wide supply range and multiple analog channels are more important than precision or low-noise performance.
The LM224 series is designed for low-cost, general-purpose applications and supports operation from a single power supply or split supplies. This flexibility allows engineers to interface signals around ground or operate from an industrial supply without requiring negative rails. Its internal frequency compensation simplifies closed-loop amplifier design, although stable operation still depends on suitable feedback networks and load conditions described by the manufacturer.
Typical applications include sensor-signal conditioning, current-loop measurement, industrial process-control modules, data-acquisition systems, and general test equipment. The 14-pin SOIC package is also convenient for through-hole assembly and conventional hand-soldering. Because the LM224 is a general-purpose amplifier, precision instrumentation may require careful offset, bias-current, noise, and common-mode analysis before finalizing the signal chain.
When designing around the LM224DG, verify input and output voltage limits for the selected dual or single supply, check that connected loads remain within the amplifier's drive capability, and reserve suitable bypass capacitance close to the supply pins. Stable feedback and compensation arrangements should be copied from the manufacturer datasheet rather than copied blindly from unrelated op-amp circuits.
This page combines the verified distributor and manufacturer-linked information for LM224DG with same-package drop-in alternatives, comparison parameters, and practical selection guidance. It highlights where the LM224's wide supply range and four-channel integration are useful, while making uncertainty in unavailable electrical details explicit.
直接替換替代品，適用於 LM224DG — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM224DG （相同外形與佔位） — 差異在於 Package, Amplifier Type, Input Offset Voltage, Input Type, Product Type.
LM224NG
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM224DR
✅ 直接替換 ⚠️ 規格未經驗證✓ 有庫存
$0.1641 / 單位
查看資料表 →LM324DG
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM324D
✅ 直接替換聯絡詢價
查看資料表 →LM224DG 最大額定值與電氣特性
| Product Type | Quad operational amplifier |
| Number of Channels | 4 circuits |
| Amplifier Type | General-purpose operational amplifier |
| Gain-Bandwidth Product | 1 MHz |
| Supply Voltage Range | 3 V to 32 V |
| Input Offset Voltage | 5 mV |
| Common-Mode Rejection Ratio | 70 dB minimum |
| Input Type | True differential inputs |
| Supply Configuration | Single supply or split supply |
| Compensation | Internally frequency compensated |
| 封裝 | 14-pin SOIC, 0.154 inch (3.90 mm) width |
| 安裝類型 | Surface mount |
| 工作溫度範圍 | -25 C to +85 C |
LM224DG 14-pin soic, 0.154 inch (3.90 mm) width 腳位配置指南
LM224DG（14-pin soic, 0.154 inch (3.90 mm) width 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LM224DG.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM224DG 適用於 6 應用s: Industrial Sensor Signal Conditioning, Data Acquisition and Instrumentation, Current Loop and Process Control, Power Supply Feedback and Monitoring, Audio and Low-Frequency Signal Conditioning, Test and Measurement Equipment.
Industrial Sensor Signal Conditioning
The LM224DG fits general-purpose industrial sensor interfaces because it combines four true-differential-input amplifiers with a 3 V to 32 V supply range in one 14-SOIC package. Multiple channels can condition related inputs without requiring four separate amplifier packages, reducing board area and simplifying routing. Its 1 MHz gain-bandwidth product is suitable for moderate-bandwidth signals, while the listed 70 dB minimum CMRR helps suppress common-mode interference. Engineers should still verify the sensor output range against the amplifier's common-mode limits and assess the 5 mV listed input offset at the required gain.
推薦
Data Acquisition and Instrumentation
The LM224DG can provide the basic amplification and buffering stages required by multi-channel data-acquisition and instrumentation equipment. Its four independent amplifiers support parallel measurement channels, and the 14-SOIC package is straightforward for conventional PCB assembly. A 1 MHz gain-bandwidth product is appropriate for many low-to-moderate-frequency sensor signals rather than high-speed waveform acquisition. Designers should pay particular attention to input offset, drift, input bias behavior, and output settling because the verified LM224DG information identifies a 5 mV input-offset value but does not provide a complete precision-noise specification.
推薦
Current Loop and Process Control
The LM224DG is applicable to basic current-loop and process-control interfaces where multiple analog channels must operate from an industrial-style supply. The 3 V to 32 V range allows operation from higher-voltage control rails, and split-supply support is useful when signals are centered around ground. Its internally frequency-compensated architecture simplifies the construction of conventional closed-loop amplifier stages. For process-control accuracy, however, engineers should verify offset and bias-current contributions, output-current requirements, common-mode range, and stability with the actual transmitter load before selecting it as the final amplifier.
推薦
Power Supply Feedback and Monitoring
The LM224DG can be used in power-supply feedback, supervision, and analog monitoring circuits where several ratios or sensing channels are required. Its wide 3 V to 32 V operating range covers many industrial and distributed-supply environments, while true differential inputs assist with measurements referenced to a remote or local return. Because the device is a general-purpose amplifier, the design should include adequate supply bypassing and account for input offset when monitoring small feedback voltages. The selected amplifier must remain within its input and output common-mode limits throughout startup, overload, and fault conditions.
推薦
Audio and Low-Frequency Signal Conditioning
The LM224DG can handle general low-frequency audio and control-signal conditioning where four channels and a wide supply range are useful. The internally compensated amplifier supports standard inverting and non-inverting configurations, while the 1 MHz gain-bandwidth product is more than adequate for many low-frequency audio functions. This device should not be assumed to provide the low-noise performance of a dedicated audio amplifier: the verified excerpts do not supply an output-noise rating. Use the manufacturer noise data and output-drive limits when designing microphone preamplifiers, headphone stages, or audio distribution networks.
推薦
Test and Measurement Equipment
The LM224DG is suited to inexpensive test and measurement modules requiring several general-purpose amplifier sections. Four channels in a 14-SOIC package allow measurement buffers, attenuators, active filters, and differential input stages to share one component. The 1 MHz gain-bandwidth product supports many bench and embedded test signals, while true differential inputs simplify rejection of common-mode voltage on balanced or floating probes. The design should account for the listed 5 mV input offset when low-level accuracy matters and verify output swing, load compatibility, and temperature behavior using the full manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 LM224DG — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM224NG | LM224DR | LM324DG | LM324D | LM2902D |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | onsemi | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 2 |
主要差異化特點
- Four integrated amplifier channels (對比LM2902D)
- Wide single-supply operating range (對比LM324D)
- Established onsemi LM224-family sourcing (對比LM324D)
- True differential inputs (對比LM2902D)
設計說明
Place the supply bypass capacitor close to the device's supply and ground pins and keep the return-current path short. The LM224 supports single-supply and split-supply operation, but the usable input and output range depends on the selected rail arrangement. Confirm the actual signal range, output swing, and supply limits from the manufacturer datasheet rather than assuming that the full 3 V to 32 V input range can also be used as signal swing.
Do not substitute a dual amplifier for the LM224DG without accounting for the reduced channel count. The LM2902D alternative uses two packages for four amplifiers, requiring layout changes even though both devices use 14-SOIC packages. Likewise, verify each alternative's pinout and offset specification. A shared package and similar family name do not guarantee identical gain, bias current, common-mode range, output drive, or temperature grade.
Route each amplifier's input, feedback components, and output according to the datasheet's recommended topology. Keep sensitive input traces away from supply-switching nodes and output nodes that may drive capacitive loads. Use a stable reference point for both inputs of a differential stage, and evaluate offset contributions from the listed 5 mV input-offset specification at the selected closed-loop gain before treating the LM224DG as a precision measurement amplifier.
合規資訊
The supplied excerpts reference RoHS information but do not provide an explicit compliance conclusion. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was provided, so these fields remain unknown.
