LT318AH - 15MHz High-Speed Operational Amplifier | Analog Devices
料号： LT318AH ✗ 停产LT318AH 概述
An operational amplifier is an analog integrated circuit that uses high-gain feedback to amplify the difference between two input voltages. In the broader electronics hierarchy, the LT318AH is an operational amplifier, analog IC, and semiconductor. Its high bandwidth permits wider signal bandwidth than slower general-purpose amplifiers, while its slew rate determines how quickly the output can move through voltage changes. These characteristics make it useful in active filters, buffers, low-level signal chains, feedback control, and measurement circuits.
The verified data identifies the LT318AH as a single-circuit amplifier with a 15 MHz nominal unity-gain bandwidth and 70 V/µs slew rate. The available distributor listing also reports approximately 0.5 µA maximum average input bias current in one marketplace result, while another product listing reports a 5 mA supply current. These figures should be checked against the manufacturer datasheet for the exact test conditions, supply voltage, temperature grade, and load conditions before final design sign-off.
The device is packaged as an 8-terminal round TO-5/MDTALCAN through-hole package. Its leaded construction is mechanically distinct from modern surface-mount op amps, so PCB replacement must account for the original footprint, lead spacing, thermal requirements, and pin orientation. The verified sources disagree on some commercial and historical details, including temperature-grade descriptions and lifecycle status, so those fields remain qualification-dependent rather than inferred.
Typical uses include high-speed instrumentation, precision signal buffering, active analog filtering, test-equipment input stages, and feedback loops requiring faster transient response than a conventional low-frequency precision amplifier. For new designs, verify the exact LT318AH datasheet, military qualification requirements, supply limits, input/output ranges, noise, bias current, stability configuration, and availability before committing the layout.
The key design consideration is to verify the complete pinout and electrical limits in the manufacturer datasheet before layout or replacement. Decouple the supply pins locally, keep feedback traces short, and verify stability with the intended source and load. Because this is a through-hole TO-5 device, production cost, availability, and thermal performance may differ substantially from newer surface-mount alternatives.
This page consolidates verified manufacturer and distributor information with explicit data gaps, practical application guidance, and drop-in replacement screening. It does not invent missing electrical values, lifecycle claims, qualification details, or cross-reference parts that were not established by the supplied evidence.
直接替换替代料： LT318AH ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料LT318AH 最大额定值与电气特性
| Product Type | Operational amplifier |
| Amplifier Type | Standard general-purpose amplifier |
| Number of Circuits | 1 circuit |
| Nominal Unity-Gain Bandwidth | 15 MHz |
| Slew Rate | 70 V/µs |
| 电源电流 | 5 mA |
| Maximum Average Input Bias Current | 0.5 µA |
| Package Type | 8-lead round TO-5/MDTALCAN through-hole package |
| Terminal Form | Wire |
| Number of Terminals | 8 |
| Package Shape | Round |
| 安装类型 | Through hole |
| Input Bias Current | 0.5 µA maximum average input bias current reported in verified marketplace data |
| RoHS 状态 | Supported according to verified distributor listing |
| Manufacturer Product Page | LT318A family product page |
LT318AH round 引脚配置指南
LT318AH（round 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LT318AH.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LT318AH 适用于 6 应用s: High-Speed Instrumentation Signal Conditioning, Active Analog Filtering, Precision Test and Measurement Buffer, Legacy Feedback Control Loop, High-Speed Data-Acquisition Interface, Analog Sensor Signal Conditioning.
High-Speed Instrumentation Signal Conditioning
The LT318AH fits instrumentation front ends that need more bandwidth than a conventional precision op amp while retaining a familiar single-amplifier architecture. Its reported 15 MHz unity-gain bandwidth and 70 V/µs slew rate can support signal paths handling larger bandwidth or faster transient content than slow precision amplifiers. In a buffer or gain stage, the designer should verify input common-mode range, output swing, noise, offset, and stability against the exact LT318AH datasheet. The through-hole TO-5 package may suit legacy laboratory, industrial, or defense-related equipment, but it requires a footprint and lead-clearance review before layout reuse.
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Active Analog Filtering
The LT318AH is relevant to active analog filters when the target signal bandwidth requires more speed than a general-purpose low-frequency amplifier. The verified 15 MHz nominal unity-gain bandwidth and 70 V/µs slew rate provide the starting point for gain-bandwidth and transient-response analysis. In a filter, component tolerances, op-amp noise, input bias current, output loading, and phase margin can determine whether the apparent bandwidth is usable. Confirm the exact LT318AH supply voltage and stability configuration in the manufacturer datasheet, because those values are not included in the supplied verification data.
推荐
Precision Test and Measurement Buffer
A buffer application can benefit when the source impedance and cable loading require a faster amplifier response than a low-bandwidth precision device. The LT318AH's reported 70 V/µs slew rate helps assess large-signal settling, while its 15 MHz nominal unity-gain bandwidth sets a broad small-signal performance reference. Designers must still check input bias current, offset voltage, input noise, output drive, and supply headroom against their test limits. Because the LT318AH uses an 8-lead round TO-5 package, the mechanical footprint and thermal path should be verified against the original assembly.
推荐
Legacy Feedback Control Loop
The LT318AH may be suitable for a legacy feedback-control amplifier or servo loop where the original circuit depends on the device's verified bandwidth and slew behavior. The reported 15 MHz unity-gain bandwidth can support loop-gain analysis, while the 70 V/µs slew rate helps determine the maximum output transition rate under load. Actual loop stability depends on the compensation network, sensor characteristics, load, and supply voltage, none of which are supplied for the LT318AH here. Review the original schematic and manufacturer datasheet before replacing or retuning the loop.
推荐
High-Speed Data-Acquisition Interface
The LT318AH can be evaluated as an analog interface stage for high-speed data-acquisition systems that need a 15 MHz-class op amp. Its reported slew rate of 70 V/µs may help when signals require rapid output transitions, but ADC settling, acquisition time, and system bandwidth must be analyzed together. The supplied evidence does not include the LT318AH input/output range, noise, or supply limits, so those values must be taken from the manufacturer datasheet. Mechanical compatibility is especially important because the TO-5 leaded package cannot be assumed interchangeable with a surface-mount amplifier.
推荐
Analog Sensor Signal Conditioning
The LT318AH can be used in sensor signal-conditioning architectures when the sensor output requires amplification, buffering, or active filtering beyond the bandwidth of a low-speed general-purpose op amp. The reported 15 MHz unity-gain bandwidth and 70 V/µs slew rate provide useful starting points for signal-path calculations, while the reported 0.5 µA maximum average input bias current is relevant to high-impedance sources. Actual sensor accuracy will also depend on offset voltage, noise, common-mode range, and supply voltage, which are not present in the supplied data. Verify those parameters and the package footprint in the manufacturer documentation.
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推荐产品汇总
工程参考数据： LT318AH ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Product Type | High-speed operational amplifier |
| Amplifier Type | Standard general-purpose amplifier |
| Number of Circuits | 1 circuit |
| Nominal Unity-Gain Bandwidth | 15 MHz |
| Slew Rate | 70 V/µs |
| Supply Current | 5 mA |
| Input Bias Current | 0.5 µA maximum average input bias current reported in verified marketplace data |
| Package | 8-lead round TO-5/MDTALCAN through-hole package |
| Terminal Form | Wire |
| Number of Terminals | 8 |
| Mounting Type | Through hole |
| RoHS Status | Supported according to verified distributor listing |
关键差异点
- Legacy-compatible high-speed device positioning （对比 Modern surface-mount operational amplifier)
- Reported bandwidth and transient response （对比 Low-bandwidth precision amplifier)
- Low reported input bias current for high-impedance signal paths （对比 General-purpose amplifier with higher input bias current)
设计说明
Treat the LT318AH as a through-hole legacy part rather than assuming a modern SOIC or QFN footprint can be substituted. Before layout, compare the original TO-5 land pattern, lead diameter, lead spacing, body clearance, and pin numbering against the manufacturer drawing. Confirm whether the eight terminals include a case or shield connection and whether that connection is electrically required in the target design.
The verified distributor data reports approximately 5 mA supply current, but it does not provide the supply-voltage range or quiescent-current test conditions. Do not calculate power dissipation from this figure alone. Confirm the operating supply, output current, ambient temperature, and thermal resistance in the manufacturer datasheet, then estimate dissipation using the actual voltage and current conditions for the design.
Keep feedback components and signal traces close to the amplifier pins, and provide local supply bypassing where the package and datasheet permit. The 15 MHz nominal bandwidth can make board parasitics and probe capacitance relevant, especially in feedback or high-Q filter networks. Validate stability, settling, and output drive with the intended source impedance and load rather than relying only on the headline bandwidth.
合规信息
A verified distributor listing states RoHS supported, but the supplied evidence does not provide sufficient documentation for REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Treat the RoHS statement as distributor-reported and verify current manufacturer documentation before procurement.
