on November 13th 57

LM318: Circuit, Pinout, and Alternatives

The LM318 op-amp is a fast and precise electronic component that plays a role in many devices. Its flexibility and special features make it popular working on complex projects. In this article, we'll take a closer look at what makes the LM318 so useful. We'll cover its pin layout, how it's represented in designs, how it fits into circuits, and its technical specs. By the end, you'll see how this powerful little chip helps improve signal quality and drives new ideas in areas like telecommunications and car electronics.

Catalog

What is the LM318?

The LM318 operational amplifier captivates with its remarkable speed, surpassing traditional counterparts. This efficiency aligns seamlessly with applications needing swift signal processing, such as fast integrators and wide-band amplifiers. It also excels in digital-to-analog converters. The swift signal handling is used in scenarios demanding precise timing, notably in telecommunications where bandwidth and speed dictate system functionality. When incorporating the LM318 into circuits, thoughtful planning regarding its high slew rate and bandwidth is common practice. These features are strategically utilized to enhance response times and improve signal fidelity. For instance, in audio systems, leveraging an amplifier like the LM318 guarantees superior auditory clarity. The LM318 offers consistent performance across a spectrum of uses, blending speed with precision.

LM318 Pin Configuration

Pin No	Pin Name	Description
1	COMP 1	Compensation pin 1
2	IN(-)	Inverting input
3	IN(+)	Non-inverting input
4	GND	Ground
5	COMP 3	Compensation pin 3
6	OUT	Output
7	Vcc	Positive supply voltage
8	COMP 2	Compensation pin 2

LM318 Symbol, Footprint, and CAD Model

Schematic Diagram of the LM318

Alternatives of the LM318

Part Number	Description	Manufacturer
LM318DG4	Single High-Speed Operational Amplifier, 8-SOIC 0 to 70	Texas Instruments
LM318DRG4	Single High-Speed Operational Amplifier, 8-SOIC 0 to 70	Texas Instruments
LM318L-S08-R	Operational Amplifier, 1 Func, 15000uV Offset-Max, BIPolar, PDSO8, LEAD FREE, SOP-8	Unisonic Technologies Co Ltd
LM318G-S08-R	Operational Amplifier, 1 Func, 15000uV Offset-Max, BIPolar, PDSO8, HALOGEN AND LEAD-FREE, SOP-8	Unisonic Technologies Co Ltd
LM318-S08-R	Operational Amplifier, 1 Func, 15000uV Offset-Max, BIPolar, PDSO8, SOP-8	Unisonic Technologies Co Ltd
LM318DRE4	OP-AMP, 15000uV OFFSET-MAX, 15MHz BAND WIDTH, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8	Texas Instruments
LM318-S08-T	Operational Amplifier, 1 Func, 15000uV Offset-Max, BIPolar, PDSO8, SOP-8	Unisonic Technologies Co Ltd
LM318DE4	Single High-Speed Operational Amplifier, 8-SOIC 0 to 70	Texas Instruments
LM318L-S08-T	Operational Amplifier, 1 Func, 15000uV Offset-Max, BIPolar, PDSO8, LEAD FREE, SOP-8	Unisonic Technologies Co Ltd
LM318DR	Single High-Speed Operational Amplifier, 8-SOIC 0 to 70	Texas Instruments
LM318D	8-SOIC (0.154, 3.90mm Width), Number of Pins 8, Slew Rate 70V/μs, Input Offset Voltage 10 mV, CMRR 70 dB, Supply Voltage 15 V, Current 5 mA	Texas Instruments
LM318MX/NOPB	8-SOIC (0.154, 3.90mm Width), Number of Pins 8, Slew Rate 70V/μs, Input Offset Voltage 10 mV, CMRR 70 dB, Supply Voltage 15 V, Current 5 mA	Texas Instruments
LT1722CS8#PBF	8-SOIC (0.154, 3.90mm Width), Number of Pins 8, Slew Rate 70V/μs, Input Offset Voltage 400 μV, CMRR 80 dB, Supply Voltage 5 V, Current 3.7 mA	Linear Technology/Analog Devices, Inc.
LM318M	8-SOIC (0.154, 3.90mm Width), Number of Pins 8, Slew Rate 70V/μs, Input Offset Voltage 10 mV, CMRR 70 dB, Supply Voltage 15 V, Current 5 mA	Texas Instruments

Technical Specifications

Technical specifications, characteristics, and parameters of the LM318, along with components comparable to the Texas Instruments LM318D.

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 6 days ago)
Mount	Surface Mount
Package / Case	8-SOIC (0.154, 3.90mm Width)
Operating Temperature	0°C~70°C
JESD-609 Code	e4
Part Status	Active
Number of Terminations	8
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form	GULL WING
Number of Functions	1
Base Part Number	LM318
Operating Supply Voltage	20V
Operating Supply Current	5mA
Slew Rate	70V/µs
Amplifier Type	General Purpose
Factory Lead Time	8 Weeks
Mounting Type	Surface Mount
Number of Pins	8
Packaging	Tube
Pbfree Code	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN Code	EAR99
Terminal Position	DUAL
Peak Reflow Temperature (Cel)	260
Supply Voltage	15V
Pin Count	8
Number of Channels	1
Nominal Supply Current	10mA
Architecture	VOLTAGE-FEEDBACK
Common Mode Rejection Ratio	70 dB
Current - Input Bias	150nA
Input Offset Voltage (Vos)	10mV
Unity Gain BW-Nom	15000 kHz
Average Bias Current-Max (IIB)	0.5µA
Frequency Compensation	YES
Low-Bias	NO
Bias Current-Max (IIB) @25°C	0.5µA
Dual Supply Voltage	9V
Input Offset Current-Max (IIO)	0.2µA
Length	4.9mm
Thickness	1.58mm
Radiation Hardening	No
Lead Free	Lead Free
Voltage - Supply, Single/Dual (±)	10V40V ±5V20V
Neg Supply Voltage-Nom (Vsup)	-15V
Voltage Gain	108.02dB
Low-Offset	NO
Voltage - Input Offset	4mV
Micropower	NO
Programmable Power	NO
Power	NO
Height	1.75mm
Width	3.91mm
REACH SVHC	No SVHC
RoHS Status	ROHS3 Compliant

Features of the LM318

Signal Bandwidth and Slew Rate

The LM318 stands out with an impressive signal bandwidth of up to 5 MHz, making it suitable for handling complex high-frequency applications with finesse. Paired with this, the device possesses a minimum slew rate of 50 V/µs, catering to the need for signal clarity in swiftly changing scenarios. This dual capability is advantageous in circuits demanding swift and precise signal processing, facilitating accurate results without noticeable delay or distortion.

Internal Frequency Compensation

Integrating internal frequency compensation is a notable aspect of the LM318's design. This feature enhances its integration into a range of circuit setups by simplifying the amplifier's stability across diverse operational parameters. The internal compensation also contributes to consistent performance in high-precision tasks.

Input/Output Protection

The LM318 is equipped with solid input and output protection, rendering it a dependable choice across various electronic applications. Such protective measures shield the component from potential hazards like overvoltage or current spikes, contributing to its longevity and stable functionality. By incorporating these defenses, the device not only increases its safety profile but also appeals who prioritize reliability and resilience in their components.

Voltage Range and Performance

Efficient across a broad voltage range of ±5 V to ±20 V, the LM318 proves its versatility in meeting diverse application needs. This adaptability makes it fit for both low and high-power applications, seamlessly adjusting to varying power supply conditions while maintaining performance standards. Its capacity to operate within this range highlights its flexibility, establishing it as a valuable tool in dynamic settings where voltage levels may shift.

Applications of the LM318

A/D Converters

Precision and speed are often viewed as the heart and soul of analog-to-digital converters. The LM318, with its rapid slew rate and minimal signal distortion, suits quick signal processing remarkably well. This op-amp effectively manages high-frequency analog signals, playing a role in applications needing dependable digital conversion. In practice, the LM318 often finds itself integrated into intricate systems, facilitating seamless signal transitions from analog to digital, ensuring the high-tech gadgets we cherish maintain their edge.

Oscillators

Oscillators embody the pulse of consistent signal generation. The LM318, with its high-speed traits, ensures the creation of stable waveforms for communication devices. When architects of signal generation set their sights on designing circuits, the LM318's framework emerges as a reliable ally, utilizing its swift response times to maintain waveform fidelity. Applications showcase the LM318's role in compact oscillator setups, demonstrating its ability to sustain operation under unique conditions, echoing a shared drive for reliability and endurance.

Active Filters

Active filters are tasked with the engaging challenge of surmounting dynamic signal shifts. The LM318's extensive bandwidth renders it apt for filters that exclude unwanted signal elements while preserving desired frequencies' purity. In audio processing and telecommunications, these filters demand precise signal navigation. Many admire its transformative quality in customizing filtering nuances, enabling audio quality improvements and clearer signals. This adaptability strikes resonance with our innate pursuit of precision and clarity.

Sample-and-Hold Circuits

In the sample-and-hold circuits, ensuring signal fidelity during sampling intervals reflects a quest for perfection. The LM318 shines here, ensuring rapid settling times and signal consistency, integral for precise data capture in digital frameworks. These features make it potent for applications like digital voltmeters and data acquisition systems, where precision in capturing and holding signal values affects overall effectiveness. This capability often revolutionizes environments where data accuracy transcends mere utility.

General-Purpose Amplifiers

The adaptability of the LM318 as a general-purpose amplifier echoes its capacity to embrace a diverse spectrum of amplification tasks. It finds purpose in amplifying low-level audio signals and boosting insignificant voltage signals in scientific endeavors. The LM318's adaptability ensures smooth integration into various amplification scenarios. In reality, this flexibility caters to both conventional and intricate amplification needs, highlighting its presence in electronic toolkits, reflecting a parallel to adaptability and resourcefulness.

Test Circuit of the LM318

Package for LM318

LM318 Manufacturer Information

Texas Instruments, a prominent figure in the semiconductor industry, crafts the innovative LM318. This mirrors their relentless pursuit of technological advancement and creativity in semiconductors on a global stage. Established in the mid-20th century, Texas Instruments (TI) charts a rich course from a modest geophysical services firm to a formidable force in global electronics. Their strategic foresight and adaptability have been great in their ascent to prominence. Texas Instruments maintains a competitive posture by harnessing its broad portfolio and dedication to focused solutions. Insights from the competitive landscape reveal the necessity of cultivating strong affiliations and maintaining nimbleness in reacting to market shifts. Texas Instruments' contribution to the creation of the LM318 exemplifies their broader dedication to superiority and trailblazing in the semiconductor field. By appreciating the delicate equilibrium of historical evolution, R&D commitment, and agile responses to market trends, one acquires a thorough understanding of how TI has sustained its leadership over the years.