LM218D - 15MHz, 50V/us Operational Amplifier | TI
MPN: LM218D ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.3471 | $0.35 |
| 10 | $0.3471 | $3.47 |
| 100 | $0.3471 | $34.71 |
| 500 | $0.3471 | $173.55 |
| 1,000 | $0.3471 | $347.10 |
LM218D Overview
An operational amplifier is a high-gain, differential-input active device used in amplifier, comparator, filtering, summing, and feedback-control circuits. The LM218 belongs to the bipolar operational-amplifier hierarchy and combines a wide common-mode capability with internal frequency compensation. Its speed supports accurate reproduction of rapidly changing signals rather than only low-frequency voltage regulation or buffering.
The verified LM218 data identifies bipolar technology, nominal voltage gain of 25,000, maximum supply voltage limit of 20 V, and a supply-voltage range extending to ±20 V. The LM218D is supplied in an 8-terminal gull-wing SOP package, with an 8-SOIC outline reported by Rochester Electronics. These characteristics suit instrumentation, waveform processing, and feedback systems requiring substantially more bandwidth than general-purpose single-supply amplifiers.
Because the device is bipolar, input bias current and noise characteristics must be considered when the source impedance is high. The input network should also be checked against the common-mode input range at the actual supply voltages. Internal frequency compensation removes the need for an external compensation network in ordinary closed-loop use, although loop gain and stability still depend on the surrounding feedback network and load.
Typical uses include low- and intermediate-frequency instrumentation, pulse and waveform conditioning, active filtering, servo control, and analog signal processing. The 15 MHz bandwidth and 50 V/us minimum slew rate are the principal selection criteria when signal edges must remain accurate. Applications requiring rail-to-rail input or output operation, single-supply operation near zero volts, or very low offset and bias current should use a different amplifier family.
For a new PCB, preserve the verified eight-pin SOIC footprint and verify the complete manufacturer pinout before layout. Existing designs should check supply polarity, input common-mode range, output swing, decoupling, and stability across the intended load. This page combines the supplied distributor data, available cross-reference information, and engineering guidance without treating unverified performance values as facts.
Drop-in alternatives for LM218D — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM218D
✅ Drop-In✓ In Stock
$0.3471 / Unit
View Datasheet →LM218D Maximum Ratings & Electrical Characteristics
| Product Type | High-performance operational amplifier |
| Small-Signal Bandwidth | 15 MHz typical |
| Slew Rate | 50 V/us minimum |
| Bias Current | 250 nA maximum for LM118/LM218 |
| Supply Voltage Range | ±20 V |
| Maximum Supply Voltage Limit | 20 V |
| Nominal Voltage Gain | 25,000 V/V |
| Technology | Bipolar |
| Frequency Compensation | Internal |
| Input and Output Overload Protection | Specified in manufacturer family datasheet |
| Package | 8-SOIC, gull-wing SOP |
| Terminal Count | 8 terminals |
| Package Width | 3.90 mm |
| Mounting Type | Surface mount |
| Input Configuration | Dual differential input |
| Overload Recovery | Specified in manufacturer family datasheet |
LM218D 3.90 mm Pin Configuration Guide
Pin configuration for LM218D (3.90 mm 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 LM218D.
Refer to the datasheet for full pin configuration.
Typical Applications
LM218D is suitable for 6 applications: Precision Instrumentation, Waveform and Pulse Conditioning, Active Filtering, Servo and Feedback Control, Analog Signal Processing, Educational and Laboratory Circuits.
Precision Instrumentation
The LM218D suits instrumentation front ends that must preserve rapidly changing analog signals while retaining high nominal open-loop gain. Its verified 15 MHz typical small-signal bandwidth and 50 V/us minimum slew rate provide useful speed margin for sensor conditioning and active feedback networks. Place the amplifier close to the measurement node, use a stable reference and short feedback path, and verify the actual common-mode and output-swing limits from the manufacturer datasheet. The bipolar input also makes source impedance and bias current important; the supplied family data specifies 250 nA maximum bias current for LM118/LM218.
Recommended
Waveform and Pulse Conditioning
Use LM218D in waveform and pulse-conditioning circuits when edge fidelity matters more than the low bandwidth of a general-purpose amplifier. The 15 MHz typical bandwidth and 50 V/us minimum slew rate help the output follow fast input transitions, while the 25,000 nominal gain supports high-gain stages when the feedback network is designed correctly. Confirm output swing and drive capability at the selected supply voltage, keep the feedback loop short, and add only the compensation or filtering required by the measured loop response. The supplied data does not specify large-signal settling, so validate it in the intended load.
Recommended
Active Filtering
The LM218D can implement active filters and frequency-selective analog channels where the LM218 family's 15 MHz bandwidth provides more loop capability than a slow precision amplifier. At high closed-loop gain, verify phase margin against the filter topology and load capacitance; the internally compensated device does not remove the need for a stable feedback design. Keep resistor networks short and place compensation or anti-aliasing components according to the intended cutoff and impedance. The verified data does not specify noise, offset, or common-mode limits, so those specifications must be checked before claiming precision filtering.
Recommended
Servo and Feedback Control
LM218D is appropriate for servo amplifiers and feedback-control loops that need faster response than a general-purpose device. Its 50 V/us minimum slew rate and 15 MHz typical bandwidth allow the amplifier to respond to control-loop dynamics rather than only static set-point changes. The circuit designer should account for supply decoupling, output loading, loop compensation, and the device's unverified output-current and stability limits. Start with a conservative gain-bandwidth allocation and test phase margin across temperature and supply tolerance rather than relying on nominal bandwidth alone.
Recommended
Analog Signal Processing
LM218D fits general analog signal-processing blocks such as summing, gain, impedance, and feedback stages where a bipolar high-performance amplifier is preferred. The verified nominal gain of 25,000 and internally compensated architecture simplify the basic topology, while 15 MHz bandwidth and 50 V/us minimum slew rate allow the stage to process faster signals. Choose resistor values that preserve the intended bias and dynamic range, keep the input reference within the common-mode range, and avoid excessive capacitive loading at the output. Because rail-to-rail behavior and exact offset data were not supplied, verify them before final schematic release.
Recommended
Educational and Laboratory Circuits
LM218D is suitable for laboratory experiments and instrumentation training circuits that demonstrate gain, bandwidth, slew rate, compensation, and feedback behavior. Its accessible 8-SOIC package and verified family characteristics make it easier to prototype than a complex high-speed mixed-signal device. Use a stable dual supply arrangement when the circuit is designed around the verified ±20 V family description, and include current limiting or a controlled load during initial testing. Do not infer rail-to-rail operation from the package or generic amplifier naming; consult the manufacturer datasheet for the actual input and output limits.
Recommended
Recommended Products Summary
Engineering reference data for LM218D — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM218D |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 8-SOIC gull-wing SOP | 8-SOIC gull-wing SOP |
| Small-Signal Bandwidth | 15 MHz typical | 15 MHz typical |
| Slew Rate | 50 V/us minimum | 50 V/us minimum |
| Supply Voltage Range | ±20 V | ±20 V |
| Nominal Voltage Gain | 25,000 | 25,000 |
| Bias Current | 250 nA maximum for LM118/LM218 | 250 nA maximum for LM118/LM218 |
| Technology | Bipolar | Bipolar |
| Frequency Compensation | Internal | Internal |
| Terminal Count | 8 | 8 |
| Reference Unit Price | $0.3471 | $0.3471 |
| Input and Output Overload Protection | Specified in manufacturer family datasheet | Specified in manufacturer family datasheet |
Key Differentiators
- Higher verified speed than general-purpose single-supply alternatives (vs LM358D)
- High nominal open-loop gain for precision signal conditioning (vs LM324D)
- Bipolar architecture for high-speed analog signal paths (vs NE5532D)
Design Notes
The verified LM218 family description specifies operation up to ±20 V, but the complete supply-current, output-current, and thermal limits are not included in the supplied data. Do not infer that the device can source or sink arbitrary load current. Select supply decoupling from the manufacturer recommendations, keep return paths short, and verify dissipation with the actual output voltage, load current, and ambient temperature before production release.
Use the manufacturer LM218D package drawing to create the 8-SOIC land pattern. The supplied distributor data confirms an 8-terminal gull-wing SOP and 3.90 mm width but does not provide the numbered pin table or PCB dimensions. Confirm pin 1 orientation, pin names, solder-mask clearance, and assembly tolerances from the official datasheet or package drawing before generating fabrication files.
The LM218D's 15 MHz bandwidth and 50 V/us minimum slew rate make fast edge behavior important. Keep the feedback loop compact, place input and output connections away from unrelated switching nodes, and use a ground reference that does not share high-current return paths with the amplifier. If driving a capacitive or long cable load, measure overshoot and ringing rather than assuming the nominal slew rate guarantees acceptable system behavior.
Do not treat the LM218D as a drop-in replacement for LM358D, LM324D, or another amplifier solely because both use an 8-pin-class package. The verified data does not establish matching pin assignments, common-mode range, output swing, compensation, or load behavior for those parts. Compare the complete datasheet and perform a circuit-level check before substitution; the supplied cross-reference results do not provide a verified alternative MPN.
Compliance Information
The supplied search results do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. These fields remain unknown rather than assumed.
