LM258P - Dual 30 V 700 kHz Op Amp | Texas Instruments
料号： LM258P ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LM258P 概述
An operational amplifier is a voltage-gain building block within analog and mixed-signal electronics. The LM258P belongs to the bipolar operational-amplifier family, combining differential inputs, high voltage gain, internal frequency compensation, and common operation from a single or split supply. Its two independent channels allow simultaneous amplification, filtering, buffering, or feedback control without requiring two separate amplifier packages.
The verified source data identifies a wide supply-voltage operating range, high DC voltage gain, unity-gain bandwidth, low supply current, and low input-bias current. The search results specifically identify 100 dB large DC voltage gain, 1.1 MHz unity-gain bandwidth, approximately 500 µA supply current per amplifier, and approximately 20 nA input-bias current. These characteristics make the device relevant to instrumentation where useful closed-loop accuracy is more important than very high speed.
Each amplifier is independently compensated, allowing normal operation without external frequency-compensation components. Input and output-device choices support practical single-supply and split-supply arrangements, while the dual configuration can reduce board area in paired channels. Nevertheless, output-current capability, common-mode limits, input-offset behavior, noise, and stability should be checked against the complete manufacturer datasheet before precision or load-heavy use.
Typical uses include transducer signal conditioning, low-frequency active filters, sensor amplification, instrumentation amplifiers, sample-and-hold interfaces, and industrial control loops. The 8-pin PDIP package is appropriate for through-hole assembly and prototypes, and its wide temperature coverage supports equipment operating across industrial temperature ranges.
PCB design should keep input and feedback paths short, provide adequate supply bypassing, and maintain a stable reference or mid-supply point when the output must remain biased above ground in single-supply operation. Avoid relying on the verified snippets for load-current or saturation limits; those values require the complete LM258 manufacturer datasheet.
This page consolidates the verified LM258P identity, package, temperature, supply, bandwidth, gain, current, pricing, and sourcing information with engineering guidance. It also distinguishes verified facts from parameters that still require full-datasheet confirmation, providing a practical basis for initial design and procurement review.
LM258P 最大额定值与电气特性
| Number of Amplifiers | 2 amplifiers |
| Operational-Amplifier Type | Dual high-gain internally frequency-compensated bipolar operational amplifier |
| Maximum Supply Voltage | 30 V |
| Large DC Voltage Gain | 100 dB |
| Unity-Gain Bandwidth | 1.1 MHz |
| TI Family Gain-Bandwidth Description | 700 kHz |
| Supply Current per Amplifier | 500 µA |
| Input Bias Current | 20 nA |
| 工作温度范围 | -25°C to 85°C |
| Number of Circuits | 2 circuits |
| Supply Configuration | Single supply or split supply |
| Frequency Compensation | Internally frequency-compensated |
| Package Type | 8-pin PDIP (P) |
| 安装方式 | Through-hole |
| Product Classification | Standard general-purpose amplifier |
LM258P 8-pin pdip (p) 引脚配置指南
LM258P（8-pin pdip (p) 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： LM258P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM258P 适用于 6 应用s: Industrial Sensor Signal Conditioning, Active Low-Frequency Filtering, Transducer Amplification, Audio and Communication Buffering, Portable Measurement Front Ends, Process Control Loops.
Industrial Sensor Signal Conditioning
The LM258P fits low-frequency sensor conditioning because each channel provides high large DC voltage gain, verified 100 dB large DC gain, and approximately 20 nA input-bias current. The two independent amplifiers can condition two related inputs or form parts of an instrumentation front end with suitable external resistors. Its -25°C to 85°C operating range suits many industrial environments. In a typical non-inverting stage, the closed-loop gain is set by external resistors rather than the amplifier’s very high open-loop gain. Verify input common-mode range, output swing, offset, noise, and stability for the actual sensor and supply before production.
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Active Low-Frequency Filtering
The LM258P can implement active filters where operation below its verified 1.1 MHz unity-gain bandwidth is sufficient. The dual 8-pin PDIP package allows a second-order section and another amplifier for buffering or gain in the same physical device. Internal frequency compensation removes the need for a separate dominant-pole capacitor in ordinary voltage-feedback use. Component tolerance, gain-bandwidth margin, output loading, and the filter’s desired noise and phase response determine whether the loop remains stable; those details require validation against the complete manufacturer datasheet.
推荐
Transducer Amplification
The LM258P is suitable for many low-frequency transducer amplifiers because the verified large DC voltage gain of 100 dB supports accurate closed-loop gain when feedback components are stable, while input bias current is listed at approximately 20 nA. One channel may amplify the sensor while the second provides active filtering, reference buffering, or gain. High source impedance can make input-bias and offset effects significant, so the sensor’s equivalent resistance and the selected feedback network must be included in the error budget.
推荐
Audio and Communication Buffering
The LM258P can buffer or add modest gain in low-frequency audio and communications paths when the 1.1 MHz unity-gain bandwidth provides more bandwidth than the signal requires. Its dual format is useful for stereo or paired-channel buffering within one 8-pin PDIP package. However, the verified snippets do not establish input-referred noise, distortion, output-current capability, or slew rate, all of which are important for audio and communication quality. Those parameters must be checked in the complete datasheet before using the amplifier as a demanding audio output device.
推荐
Portable Measurement Front Ends
The LM258P suits battery-powered measurement circuitry where approximately 500 µA supply current per amplifier is valuable and two analog channels must fit a through-hole board. A battery-based design still must account for the voltage range in which the amplifier regulates correctly and for output headroom on a single supply. The dual package can reduce component count, but resistor leakage, ADC input range, ground offsets, and the required common-mode bias can dominate overall accuracy. Use the verified 30 V family rating as a ceiling, not as evidence of safe operation at every rail combination.
推荐
Process Control Loops
The LM258P can serve as a low-frequency error amplifier in process-control loops where the verified 700 kHz family bandwidth description and 1.1 MHz unity-gain bandwidth exceed the intended control-loop rate. Its dual channels can implement an active filter or output driver alongside the main controller amplifier. Real deployments must account for actuator drive requirements, capacitive loading, settling, phase margin, and output saturation. Because those specifications are absent from the verified excerpts, engineers should derive loop compensation from the complete LM258 datasheet rather than assuming generic op-amp behavior.
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推荐产品汇总
工程参考数据： LM258P ——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 |
|---|---|
| Brand | Texas Instruments |
| Package | 8-pin PDIP (P) |
| Number of Amplifiers | 2 |
| Maximum Supply Voltage | 30 V |
| TI Family Bandwidth Description | 700 kHz |
| Unity-Gain Bandwidth | 1.1 MHz |
| Large DC Voltage Gain | 100 dB |
| Supply Current per Amplifier | 500 µA |
| Operating Temperature Range | -25°C to 85°C |
关键差异点
- High large-signal DC gain for general-purpose precision feedback loops （对比 LM358P)
- Verified higher operating-temperature ceiling （对比 LM358P)
- Two independent amplifiers in one through-hole package （对比 LM2904P)
设计说明
Place supply-bypass capacitors close to the two amplifier sections and follow the complete datasheet’s recommended topology. Keep each non-inverting and inverting input path short, and place feedback resistors near the associated amplifier pins to reduce parasitic capacitance. With an 8-pin PDIP, adequate lead spacing exists for a conventional through-hole layout, but analog signal routing should still avoid sharing noisy return paths with output or digital circuitry.
Do not treat the verified 30 V family rating as proof that every input or output can operate over the entire range. Before using a single 5 V, 12 V, or split supply, verify input common-mode limits, output swing, supply polarity, and absolute maximums in the full datasheet. A mid-supply reference may be required when the circuit must amplify signals centered on 0 V while operating from one positive rail.
The LM258P is best suited to low-frequency, moderate-impedance analog paths rather than high-speed or capacitive-load driving. Confirm output current, slew rate, gain-bandwidth interaction, and stability for the actual load before release. If driving a long cable, ADC input, or reactive network, add the manufacturer-recommended isolation or compensation and validate settling at the intended closed-loop gain.
合规信息
The verified excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable based on the provided general-purpose industrial temperature description, but no formal qualification claim is made.