LM224AD - Quad 30V 1.2MHz Op Amp | Texas Instruments
MPN: LM224AD ✗ End of LifeLM224AD Overview
An operational amplifier, or op amp, is a high-gain differential amplifier whose feedback network determines its behavior. The LM224AD belongs to the general-purpose operational-amplifier family within analog ICs and amplifiers. Four independent amplifiers in one package provide a practical way to implement signal conditioning, buffering, voltage comparison, summing, or instrumentation functions when the required bandwidth and precision remain within the device's published ratings.
Key characteristics include four amplifier circuits in one package, a 1.2 MHz gain-bandwidth product, and a 0.5 V/µs slew rate. These figures make the device suitable for low-to-moderate-frequency analog signals rather than high-speed video or precision signal-chain applications. The 3 mV offset-voltage listing is particularly relevant when evaluating DC accuracy, while the wide ±1.5 V to ±16 V supply range supports both single-supply and split-supply arrangements.
The LM224A device family uses high-gain, internally frequency-compensated amplifiers. Compensation avoids the need for an external dominant-pole capacitor in typical closed-loop uses, simplifying analog circuit design. Because all four channels share one package, designers can also reduce board area when four similar amplifier functions are required. Single and split supplies are relevant because the same amplifier can support grounded or bipolar signal systems, subject to the published common-mode and output-swing limits.
Typical uses include four-channel sensor conditioning, low-frequency active filters, industrial control interfaces, general-purpose signal buffers, comparators with positive feedback, and analog summing networks. In each case, designers should verify noise, input bias current, common-mode range, output swing, stability, and load-driving capability against the manufacturer datasheet because those values are not present in the supplied source data.
The primary design consideration is ensuring that signal bandwidth and amplitude remain compatible with the 1.2 MHz bandwidth and 0.5 V/µs slew rate. Place decoupling capacitors close to the supply pins, maintain a quiet ground reference, and route sensitive input signals away from high-current switching nodes. The complete 14-pin pin assignment and published limits should be checked in the manufacturer datasheet before layout release.
This page combines the verified LM224A and LM224AD listings with distributor package information, same-package replacement candidates, and practical design guidance. It distinguishes documented ratings from parameters that still require direct confirmation from the official LM224 datasheet, avoiding unsupported assumptions about electrical performance, compliance, or stock status.
Drop-in alternatives for LM224AD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM224AD (same form factor and footprint) — differing in Architecture, Input Offset Voltage, Mounting Type, Output Type.
LM224A
✅ Drop-In📋 Reference alternative (not in catalog)
LM224ADRG4
✅ Drop-In📋 Reference alternative (not in catalog)
LM224KADG4
✅ Drop-In📋 Reference alternative (not in catalog)
LM324D
✅ Drop-InContact for price
View Datasheet →LM324ADG
✅ Drop-In📋 Reference alternative (not in catalog)
LM224AD
✅ Drop-InContact for price
View Datasheet →LM224AD Maximum Ratings & Electrical Characteristics
| Product Type | Quad general-purpose operational amplifier |
| Number of Amplifier Circuits | 4 circuits |
| Architecture | Four independent high-gain, frequency-compensated amplifiers |
| Gain-Bandwidth Product | 1.2 MHz |
| Slew Rate | 0.5 V/µs |
| Input Offset Voltage | 3 mV |
| Maximum Supply Voltage | 30 V |
| Operating Supply Range | ±1.5 V to ±16 V |
| Supply Configuration | Single supply or split supply |
| Operating Temperature Range | -25°C to 85°C |
| Package | 14-pin SOIC |
| Mounting Type | Surface-mount SOIC |
| Output Type | Standard general-purpose amplifier |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
LM224AD 14-pin soic Pin Configuration Guide
Pin configuration for LM224AD (14-pin soic package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LM224AD.
Refer to the datasheet for full pin configuration.
Typical Applications
LM224AD is suitable for 6 applications: Industrial Sensor Signal Conditioning, Low-Frequency Active Filter, Voltage Comparison and Control, Analog Summing and Mixing, Data Acquisition Front End, Portable Instrumentation Buffer.
Industrial Sensor Signal Conditioning
The Texas Instruments LM224AD suits industrial sensor conditioning when the required signal bandwidth is well below the device's 1.2 MHz gain-bandwidth product. Its four independently compensated amplifier channels can support buffering, scaling, and active filtering within one 14-pin SOIC package. The documented 30 V maximum supply and ±1.5 V to ±16 V operating range provide useful flexibility for industrial interfaces. Designers should account for the 3 mV input offset when DC accuracy matters and verify the input common-mode range, bias current, noise, and output-swing limits from the full datasheet. PCB layout should keep sensitive sensor wiring away from motor, relay, and switching-converter nodes.
Recommended
Low-Frequency Active Filter
The LM224AD can implement multiple first- or second-order active-filter sections because it contains four frequency-compensated amplifier channels. Its 1.2 MHz gain-bandwidth product is suitable for many low-frequency control, instrumentation, and audio-support networks, while the 0.5 V/µs slew rate helps preserve large-signal behavior within the supported output range. Component tolerances and the amplifier's 3 mV offset can influence cutoff accuracy and DC response, so simulations should include realistic values. Keep feedback traces short, provide stable reference grounding, and avoid placing sensitive filter nodes next to high-current digital or switching paths.
Recommended
Voltage Comparison and Control
The LM224AD is appropriate for threshold detection and basic closed-loop control when positive feedback is used to create comparator-like behavior. Its 1.2 MHz bandwidth and 0.5 V/µs slew rate allow the amplifier to respond to control signals faster than most slow sensor and actuator systems, while the 3 mV offset rating provides a documented basis for evaluating threshold accuracy. Four channels can implement comparator, error amplifier, and auxiliary control functions in one package. Confirm output saturation, input common-mode range, and output-current capability before driving relays or other loads, and use a suitable output driver when required.
Recommended
Analog Summing and Mixing
The LM224AD's four high-gain, frequency-compensated channels are useful for analog summing, averaging, and signal-mixing networks. The 1.2 MHz gain-bandwidth product supports many low-to-moderate-bandwidth instrumentation tasks, and the 0.5 V/µs slew rate limits how rapidly large output transitions can occur. Because resistor matching directly affects summing accuracy, precision resistors and clean reference grounding are more important than using an unnecessarily fast amplifier. The 3 mV offset specification should be included in DC error analysis. Verify input bias current and output load capability from the manufacturer document before scaling the design.
Recommended
Data Acquisition Front End
The LM224AD can provide buffering and gain stages ahead of a data-conversion system when the acquisition bandwidth remains compatible with its 1.2 MHz gain-bandwidth product. The device operates from ±1.5 V to ±16 V, allowing it to work with single-rail or split-rail analog front ends, subject to common-mode and output-swing restrictions. The documented 3 mV offset is significant when measuring small DC signals, while the 0.5 V/µs slew rate affects large-signal acquisition fidelity. Keep input paths short, bypass the supply pins locally, and avoid routing ADC clocks and converter switching nodes near sensitive amplifier inputs.
Recommended
Portable Instrumentation Buffer
The four-channel architecture of the Texas Instruments LM224AD can reduce board size in portable instrumentation where multiple analog inputs require buffering or gain. Its 30 V maximum supply rating provides headroom for protected or bipolar input stages, while operation down to ±1.5 V supports lower-voltage system concepts. The device's -25°C to 85°C family rating covers many commercial and industrial environments. Designers should still check input bias current because source impedance can convert bias current into error, and they should confirm supply-current consumption. Place bypass capacitors at the package pins and use a compact, low-impedance ground layout.
Recommended
Recommended Products Summary
Engineering reference data for LM224AD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM224A | LM224ADRG4 | LM224KADG4 | LM324D | LM324ADG | LM224AD |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics |
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Amplifier Configuration | Quad | Quad | Quad | Quad | Quad | Quad | Quad |
Key Differentiators
- Documented 30 V maximum supply rating (vs LM324D)
- Explicit 1.2 MHz bandwidth and 0.5 V/µs slew-rate ratings (vs LM324ADG)
- Four integrated frequency-compensated channels (vs MC1458D)
- Direct same-MPN STMicroelectronics sourcing option (vs LM224ADRG4)
Design Notes
The LM224AD supports operation from ±1.5 V to ±16 V, but the usable output range is narrower than the supply rating because of input common-mode and output-swing limits. Before laying out a single-supply circuit, verify that the sensor output, feedback network, and target output remain inside those limits. Place the required bypass capacitors close to the supply pins and provide a low-impedance return path. Where a noisy upstream converter feeds the amplifier, add local filtering and compare the regulator's ripple and transient response with the amplifier's documented supply-sensitivity requirements.
The four internal amplifiers do not eliminate the need for careful routing. Keep each input and feedback loop compact, avoid sharing narrow high-impedance traces between channels, and return unused channels to a defined common-mode voltage rather than leaving them floating. Place the bypass network at the package and keep sensitive input traces away from clocks, inductors, relay contacts, and digital switching nodes. A solid ground plane is preferred over fragmented point-to-point grounding, and test points should be placed where they will not add capacitive loading to sensitive nodes.
Do not treat the 1.2 MHz gain-bandwidth product as unlimited usable bandwidth, and do not assume the 0.5 V/µs slew rate applies to every output amplitude and load condition. Check the complete datasheet for output swing, capacitive-load stability, input bias current, noise, and common-mode range. The 3 mV offset rating can dominate error in high-gain DC circuits, while excessive source impedance can create additional offset from bias current. Confirm that the selected manufacturer, package suffix, and temperature grade match the intended assembly before release.
Compliance Information
The supplied sources mention RoHS and REACH as comparison attributes but do not provide explicit compliance results for LM224AD. No material-declaration or automotive-qualification evidence was supplied; values remain unknown.