LM224KAN - Quad Operational Amplifier | Texas Instruments
MPN： LM224KAN ✓ 啟用中LM224KAN 概覽
An operational amplifier is an analog building block that uses very high open-loop gain to amplify the difference between its inverting and non-inverting inputs. The LM224 family combines four amplifiers in one package, reducing board area and simplifying multi-channel designs. The device can support single-supply operation as well as positive and negative supply rails, which makes it useful in industrial control, instrumentation, test equipment, and sensor-interface circuits.
The LM224KAN is specified for a 14-pin PDIP package and an operating temperature range of -25 °C to 85 °C. The verified product description identifies four amplifier circuits, a standard general-purpose amplifier configuration, and instrumentation or buffer-amplifier use. The LM224 family is associated with the next-generation LM324B and LM2902B families, whose B versions are described as drop-in replacements for earlier LM224, LM324, and LM2902 versions.
Key application benefits include four amplifiers in one package, internal frequency compensation, operation from a single supply or split supply, and suitability for instrumentation and buffering. Because the LM224 is a conventional general-purpose amplifier rather than a precision or high-speed device, designers should account for its input offset voltage, input bias current, bandwidth, and output-current limitations when planning signal chains. The internal compensation also means that closed-loop stability is determined primarily by the feedback network and selected gain.
Typical uses include sensor signal conditioning, low-level analog measurement, current-to-voltage conversion, audio and communications support circuitry, process-control modules, and educational or laboratory instrumentation. In a single-supply circuit, the input and output signal levels must remain within the amplifier's common-mode and output-swing limits; in a split-supply circuit, the positive and negative rails should be connected according to the manufacturer recommendations.
For PCB layout, place the bypass capacitors close to the supply pins, keep input and feedback traces short, and avoid routing high-impedance signal lines beneath or beside power and output paths. The DIP package offers generous lead spacing and straightforward prototype insertion, although it occupies more board area than a surface-mount equivalent. This page combines the verified LM224KAN product data with practical design guidance for selecting, comparing, and implementing the part.
直接替換替代品，適用於 LM224KAN — 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： LM224KAN （相同外形與佔位） — 差異在於 Package, Input Offset Voltage, Number of Amplifiers, Amplifier Type, Maximum Supply Voltage.
LM224AN
✅ 直接替換聯絡詢價
查看資料表 →LM224N
✅ 直接替換聯絡詢價
查看資料表 →LM224NE4
✅ 直接替換📋 參考替代品（不在目錄中）
LM224KN
✅ 直接替換聯絡詢價
查看資料表 →LM224KA
✅ 直接替換📋 參考替代品（不在目錄中）
LM224KAN 最大額定值與電氣特性
| Product Type | Quad operational amplifier |
| Number of Amplifiers | 4 |
| Amplifier Configuration | Standard general-purpose amplifier |
| Supply Type | Single supply or split supply |
| Input Bias Current | 20 nA |
| Input Offset Voltage | ±1.5 mV |
| Voltage Gain | 70 dB |
| 靜態電流 | 0.3 µA per channel |
| Supply Voltage Range | 3 V to 32 V |
| 輸出電壓範圍 | ±1.5 V to 16 V |
| Output Current Per Channel | 60 mA |
| Common-Mode Rejection Ratio | 70 dB |
| 工作溫度範圍 | -25 °C to 85 °C |
| 封裝 | 14-pin PDIP, 0.300 in, 7.62 mm pitch |
| 腳位數 | 14 |
| ESD Protection | 2 kV |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| Lead-Free Status | unknown |
LM224KAN 腳位配置
| 腳位 1 | OUT1 — Output of amplifier 1 |
| 腳位 2 | -IN1 — Inverting input of amplifier 1 |
| 腳位 3 | +IN1 — Non-inverting input of amplifier 1 |
| 腳位 4 | V- — Negative supply |
| 腳位 5 | +IN2 — Non-inverting input of amplifier 2 |
| 腳位 6 | -IN2 — Inverting input of amplifier 2 |
| 腳位 7 | OUT2 — Output of amplifier 2 |
| 腳位 8 | OUT3 — Output of amplifier 3 |
| 腳位 9 | -IN3 — Inverting input of amplifier 3 |
| 腳位 10 | +IN3 — Non-inverting input of amplifier 3 |
| 腳位 11 | V+ — Positive supply |
| 腳位 12 | -IN4 — Inverting input of amplifier 4 |
| 腳位 13 | +IN4 — Non-inverting input of amplifier 4 |
| 腳位 14 | OUT4 — Output of amplifier 4 |
典型應用
LM224KAN 適用於 6 應用s: Sensor Signal Conditioning, Industrial Process Control, Laboratory Test Equipment, Current-to-Voltage Conversion, Audio and Communications Support Circuitry, Power Supply Feedback and Monitoring.
Sensor Signal Conditioning
The LM224KAN suits sensor signal-conditioning circuits because its four internally compensated amplifiers can buffer inputs and apply gain without requiring one amplifier package per channel. The verified LM224 family specifications include 20 nA input bias current, approximately 70 dB voltage gain, and operation from 3 V to 32 V, which are useful for low-level sensor interfaces. Use the amplifier in a non-inverting or differential configuration, place the feedback components close to the device, and keep high-impedance sensor wiring away from switching nodes. Verify the input common-mode range at the selected supply voltage and ensure the sensor output remains within the amplifier's allowed signal range.
推薦
Industrial Process Control
For industrial process-control and monitoring modules, the LM224KAN provides four amplifier channels in a single 14-pin PDIP package, simplifying signal conditioning for valve, sensor, and feedback paths. Its 3 V to 32 V supply capability accommodates a range of industrial rails, while the -25 °C to 85 °C temperature specification supports moderately extended ambient conditions. The device is best used where its general-purpose bandwidth and offset characteristics meet the control-loop accuracy. Add local supply bypassing, maintain short feedback paths, and check grounding carefully so injected process noise does not dominate the measured control signal.
推薦
Laboratory Test Equipment
The LM224KAN is well suited to laboratory and educational test equipment where multiple buffered inputs, simple gain stages, and flexible single- or split-supply operation are useful. Four independent amplifiers in one DIP package allow an instrument to combine impedance buffering, attenuation, offset conditioning, and output amplification. Because it is an internally compensated general-purpose amplifier, its closed-loop bandwidth and output capability should be matched to the intended measurement bandwidth. Use short, well-defined feedback networks and provide stable supply bypassing near pins 4 and 11 to reduce measurement noise and prevent instability during probe changes.
推薦
Current-to-Voltage Conversion
A common use for the LM224KAN is converting a small sensor current into a measurable voltage. The quad topology allows one channel to perform the transimpedance stage while the remaining channels provide gain, filtering support, or output buffering. The 20 nA input bias current helps limit error with high-impedance current sources, and the 3 V to 32 V supply range supports single-supply instrumentation. Select the feedback resistor carefully, keep the summing node compact, and account for parasitic capacitance; then confirm that the resulting output remains inside the amplifier's swing limits.
推薦
Audio and Communications Support Circuitry
The LM224KAN can provide low-level buffering and gain in audio or communications support circuits when the required bandwidth and distortion are modest. Four channels are available for input stages, mixers, level shifting, or output drivers, and the component can operate from a single supply or split supply to suit the surrounding circuit. Keep input and feedback paths short, use adequate supply decoupling, and avoid using the general-purpose amplifier for high-gain stages without checking its small-signal bandwidth and stability behavior. The package's through-hole format is particularly convenient for prototype and repair boards.
推薦
Power Supply Feedback and Monitoring
The LM224KAN can monitor and amplify power-supply feedback voltages in equipment where a low-cost, multi-channel analog front end is sufficient. The four amplifier channels may be assigned to output-voltage sensing, current-related sensing, fault amplification, and buffered diagnostics. Its wide supply range permits operation from several common industrial and laboratory rails, and the internally compensated architecture simplifies ordinary closed-loop use. Ensure the monitored voltages do not exceed the input common-mode limits, provide local supply bypassing, and keep high-current power paths physically separate from the feedback traces to reduce coupling.
推薦
工程參考資料，適用於 LM224KAN — 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 | LM224AN | LM224N | LM224NE4 | LM224KN | LM224KA |
|---|---|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP - same | 14-pin PDIP - same | 14-pin PDIP - same | 14-pin PDIP - same | 14-pin PDIP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 3 V to 32 V | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating |
| Operating Temperature Range | -25 °C to 85 °C | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating |
| Input Bias Current | 20 nA | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating |
| Output Current Per Channel | 60 mA | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating | Verify suffix-specific rating |
| Amplifier Type | General-purpose, internally compensated | General-purpose LM224 family | General-purpose LM224 family | General-purpose LM224 family | General-purpose LM224 family | General-purpose LM224 family |
主要差異化特點
- Four integrated amplifier channels (對比LM224AN)
- Through-hole DIP implementation (對比LM224N)
- Wide supply-voltage operating range (對比LM224NE4)
- Low input bias current for general-purpose buffering (對比LM224KN)
設計說明
Place the supply bypass capacitor or capacitors as close as practical to pins 4 and 11. Keep the traces short and use a common, low-impedance return path so switching current does not flow through the amplifier ground connection. The 14-pin PDIP footprint is mechanically simple, but the through-hole lead pattern should still be checked against connector clearance and enclosure height.
Keep the non-inverting input, inverting input, and feedback components close to the device and away from clocks, relays, and power-converter switching nodes. Because the LM224 is internally compensated, use a conventional feedback network for the intended gain and avoid long, high-impedance feedback routes. For sensor inputs, check the common-mode range before selecting the input configuration.
Do not assume that a related LM224 orderable code is an automatic substitute. Confirm the package, pinout, supply range, temperature rating, output limits, and marking against the manufacturer datasheet. In single-supply designs, also verify the signal levels against the input common-mode range and output swing; in split-supply designs, confirm the negative and positive rail limits.
合規資訊
The verified manufacturer and distributor records identify the LM224KAN as a Texas Instruments standard general-purpose operational amplifier with 2 kV ESD protection. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not explicitly identified in the available product records. AEC-Q100 qualification is not applicable to this general-purpose commercial-temperature DIP device unless a specific automotive ordering variant is selected.
