LM224NG - Quad 3-32V Op Amp, 14-PDIP | onsemi
N.º de pieza: LM224NG ✓ ActivoLM224NG Descripción general
An operational amplifier, or op amp, is an analog integrated circuit that uses high-gain differential amplification to control an output voltage. The LM224 belongs to the general-purpose op-amp class within the broader voltage-amplifier and signal-conditioning hierarchy. Its four amplifier channels make it useful when a design requires multiple analog functions in one package, reducing board area compared with four separate single or dual amplifier packages.
The LM224NG provides a 1 MHz gain-bandwidth product and a slew rate of 0.6 V/µs. These values position the device for low-frequency signal conditioning rather than high-speed pulse or video amplification. The four channels support true differential inputs, allowing common-mode input voltage and input bias current to be considered during sensor-interface and instrumentation design. The listed operating characteristics are suitable for general-purpose amplifier, buffer, and comparator-style circuit arrangements.
The 14-pin PDIP package provides through-hole mechanical compatibility and straightforward prototyping. Because the package has no exposed thermal pad, heat dissipation depends on the PCB or socket thermal path and the total dissipation of the four channels. The 3 V to 32 V supply range covers 5 V, 12 V, 24 V, and 32 V rails commonly found in industrial control, consumer electronics, instrumentation, and embedded systems. Single-supply operation also makes zero-crossing and ground-referenced signal conditioning easier to implement.
Typical uses include sensor buffering, transducer signal conditioning, low-frequency active filtering, current-to-voltage conversion, test equipment, and control-system analog front ends. Designers should check input common-mode limits, output swing, supply current, stability, and noise requirements for the selected gain and load. The LM224NG is not a precision op amp, so applications requiring very low offset, drift, or noise should compare the device with a higher-accuracy family.
This page combines the LM224NG electrical characteristics, package data, sourcing guidance, and application-oriented design notes into a practical engineering reference. Use the manufacturer datasheet for the definitive pin descriptions, maximum ratings, and test conditions before committing the part to a high-voltage or high-reliability design.
Alternativas directas para LM224NG — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LM224NG (mismo factor de forma y huella) — difiere en Package, Mounting Type, Amplifier Type, Gain-Bandwidth Product, Product Type.
LM224N
✅ Sustitución directaConsulte el precio
Ver hoja de datos →LM224KN
✅ Sustitución directaConsulte el precio
Ver hoja de datos →LM224NE4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM224DR
✅ Sustitución directa✓ En stock
$0.1641 / unidad
Ver hoja de datos →LM224NE4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM224NG Valores máximos y características eléctricas
| Amplifier Type | General Purpose Operational Amplifier |
| Number of Circuits | 4 |
| Supply Voltage Range | 3.0 V to 32 V |
| Gain Bandwidth Product | 1 MHz |
| Slew Rate | 0.6 V/µs |
| Input Type | True Differential Inputs |
| Maximum Input Bias Current | 100 nA for the LM224A variant |
| Rango de temperatura de funcionamiento | -25°C to +85°C |
| Encapsulado | 14-PDIP, 0.300 inch pitch, 7.62 mm |
| Packaging | Tube |
| Tipo de montaje | Through-hole |
Configuración de pines de LM224NG
| Pin 1 | OUT 1 — Amplifier 1 output |
| Pin 2 | IN 1- — Amplifier 1 inverting input |
| Pin 3 | IN 1+ — Amplifier 1 non-inverting input |
| Pin 4 | V- — Ground or negative supply |
| Pin 5 | IN 2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN 2- — Amplifier 2 inverting input |
| Pin 7 | OUT 2 — Amplifier 2 output |
| Pin 8 | OUT 3 — Amplifier 3 output |
| Pin 9 | IN 3- — Amplifier 3 inverting input |
| Pin 10 | IN 3+ — Amplifier 3 non-inverting input |
| Pin 11 | V+ — Positive supply |
| Pin 12 | IN 4- — Amplifier 4 inverting input |
| Pin 13 | IN 4+ — Amplifier 4 non-inverting input |
| Pin 14 | OUT 4 — Amplifier 4 output |
Aplicaciones típicas
LM224NG es adecuado para 6 aplicacións: Industrial Sensor Signal Conditioning, Temperature Measurement Front End, Current-to-Voltage Conversion, Active Low-Pass Filtering, Test and Measurement Instrumentation, Audio and Control Signal Amplification.
Industrial Sensor Signal Conditioning
The LM224NG suits low-frequency industrial sensor conditioning because its four true-differential amplifier channels operate from 3.0 V to 32 V, covering common 5 V, 12 V, and 24 V control rails. Use the channels to buffer thermocouple, resistive, or low-voltage transducer outputs before conversion or acquisition. The 1 MHz gain-bandwidth product supports low-frequency amplification, while the 0.6 V/µs slew rate avoids demanding fast transient reproduction. Verify the common-mode input range against the sensor output, especially when using a 5 V supply and signals near ground.
Recomendado
Temperature Measurement Front End
The LM224NG can provide the input buffering and gain stages for a low-frequency temperature measurement circuit. Its true differential inputs help reject common-mode voltage on resistive probes, while the 3.0 V minimum supply supports compact 3.3 V and 5 V systems. A 1 MHz gain-bandwidth product is normally more than sufficient for thermal signals that change slowly. For high-accuracy measurements, use low-tolerance resistors, matched input networks, and an ADC whose resolution and error budget match the sensor.
Recomendado
Current-to-Voltage Conversion
The LM224NG works well in a transimpedance stage for measuring small sensor currents because it offers four amplifier channels and true differential inputs. The 0.6 V/µs slew rate supports bandwidths well suited to many process-control and laboratory signals rather than photodiode-speed applications. Feedback resistor and compensation capacitor selection determines bandwidth and stability, so evaluate the complete sensor-capacitance network. Keep input routing short and use a grounded guard or shield when long cables create leakage or noise.
Recomendado
Active Low-Pass Filtering
The LM224NG can implement first- and second-order active filters for slow analog signals when a 1 MHz gain-bandwidth product is appropriate. Its four channels permit cascaded stages for a multi-pole response, and operation from 3.0 V to 32 V supports both compact low-voltage equipment and 24 V industrial instruments. Component tolerances strongly affect cutoff accuracy and Q in higher-order filters. Confirm loop stability, output swing, and the filter's maximum signal level before using the device near its supply limits.
Recomendado
Test and Measurement Instrumentation
The LM224NG is appropriate for general-purpose laboratory and test-instrument signal paths because four general-purpose channels reduce the number of packages required. The device can perform buffer, differential amplifier, and gain-stage functions around a single supply. Its 0.6 V/µs slew rate and 1 MHz gain-bandwidth product suit low-frequency waveforms, but not precision millivolt measurements or wideband instrumentation. Use low-offset alternatives for high-accuracy benches and verify resistor networks for gain accuracy.
Recomendado
Audio and Control Signal Amplification
The LM224NG can amplify low-level audio or control signals when the operating bandwidth is below its 1 MHz gain-bandwidth capability. Four channels in one 14-pin PDIP package simplify prototype boards and legacy through-hole designs. At 5 V supply, output headroom and input common-mode range limit large signal swings, so small-signal audio paths are preferable. For low-distortion audio, wide dynamic-range requirements, or frequency response beyond the general-purpose range, select a dedicated audio amplifier.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM224NG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM224N | LM224KN | LM224NE4 | LM224DR | LM224NE4 |
|---|---|---|---|---|---|---|
| Package | 14-PDIP (0.300 inch, 7.62 mm) | 14-PDIP | 14-PDIP | 14-PDIP | 14-PDIP | 14-PDIP |
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | onsemi |
| Number of Amplifier Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Primary Function | Quad General-Purpose Operational Amplifier | Quad Operational Amplifier | Quad Operational Amplifier | Quad Operational Amplifier | Quad Operational Amplifier | Quad Operational Amplifier |
Diferenciadores clave
- Single-supply range covers both compact and industrial rails (frente a LM224N)
- Four true-differential amplifier sections reduce package count (frente a LM224KN)
- Through-hole package supports simple prototyping and legacy PCB reuse (frente a LM224DR)
Notas de diseño
Confirm the input common-mode range and output swing at the intended supply voltage before using a ground-referenced signal. The LM224NG can operate from 3.0 V to 32 V, but low supply voltage reduces available output headroom. For 24 V systems, include protection against supply transients and maintain adequate clearance on the board.
Do not substitute LM224DR for LM224NG on an existing PDIP footprint because LM224DR uses an SOIC package. The pin functions are related, but the land pattern is not mechanically interchangeable. Confirm the exact suffix, pin orientation, and package drawing before ordering a replacement.
Keep each amplifier's feedback components close to the relevant input and output pins to reduce parasitic feedback and oscillation risk. Route sensitive input traces away from supply and digital return paths. In single-supply designs, connect the ground reference near the power entry and use a stable return plane so the four amplifier channels share a low-impedance reference.
Estimate dissipation from the actual supply voltage, output voltage, quiescent current, and load current for each active channel. Because the PDIP package has no exposed thermal pad, copper area and airflow influence junction temperature. Four channels operating continuously can dissipate more heat than a single-channel design, so check the worst-case operating condition rather than only the idle condition.
Choose gain and feedback values so the closed-loop bandwidth remains well below the 1 MHz gain-bandwidth product. Add compensation capacitance only after evaluating the load and source impedance. The 0.6 V/µs slew rate is sufficient for many low-frequency sensor signals but may limit large-signal output transitions in fast control loops.
Información de cumplimiento
The -25°C to +85°C operating range is documented for LM224NG. RoHS, REACH, lead-free, halogen-free, conflict-minerals, and AEC-Q100 status are not stated in the cited technical material and require confirmation from current onsemi product documentation.
