LM358AM - Dual 8-SOIC Operational Amplifier | Texas Instruments
MPN： LM358AM ✓ 啟用中LM358AM 概覽
An operational amplifier, or op-amp, is a voltage-controlled differential amplifier whose closed-loop behavior is determined mainly by external feedback components. The LM358 belongs to the broad hierarchy of operational amplifiers, analog amplifiers, analog signal-conditioning ICs, and semiconductor devices. Its two internally compensated channels can perform common tasks such as voltage amplification, buffering, summing, comparisons, active filtering, and feedback control when configured with suitable external resistors and capacitors.
The principal advantages of choosing a dual amplifier are functional integration and reduced board area. Two independent amplifiers in one LM358AM package can replace two separate single-channel devices while preserving the familiar SOIC-8 footprint. The manufacturer describes the series as suitable for general-purpose applications and emphasizes its combination of low power consumption, high gain, and a wide supply-voltage range. Exact voltage, current, gain-bandwidth, input-offset, and temperature limits require confirmation from the full manufacturer datasheet because those values were not included in the supplied web records.
The architecture is based on two independent, high-gain, internally frequency-compensated operational amplifiers. Internal frequency compensation avoids the need for an external compensation capacitor in ordinary closed-loop configurations, simplifying amplifier selection and PCB design. Because the channels are independent, one can amplify a sensor signal while the other performs a different function, such as comparison, current-to-voltage conversion, active filtering, or an output driver.
Typical uses include industrial sensor conditioning, low-cost control loops, audio preamplification, current sensing, comparator-style threshold detection, and general analog signal processing. Single-supply operation is particularly useful in embedded equipment because the amplifier can operate from a positive rail and ground. Designers must still check input and output common-mode limits, output-swing behavior, load capability, and stability for the intended configuration before releasing production hardware.
PCB implementation should preserve the exact pin assignment of the chosen SOIC-8 manufacturer variant and provide a solid ground return. Decoupling capacitors should be placed close to the supply pins, while feedback resistors and compensation networks should be kept short to minimize noise pickup and parasitic instability. The LM358AM is not rail-to-rail by implication alone; input and output behavior must be verified against the relevant datasheet limits.
This product record combines verified distributor and manufacturer references, package information, commercial availability links, and practical selection guidance. It also separates documented facts from missing numeric parameters so engineers can cross-check voltage limits, pricing, compliance, and production details against the authoritative LM358 datasheet before design release.
直接替換替代品，適用於 LM358AM — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM358AM （相同外形與佔位） — 差異在於 Amplifier Type, Package.
LM358DR
✅ 直接替換聯絡詢價
查看資料表 →LM358-N
✅ 直接替換📋 參考替代品（不在目錄中）
LM358AM
✅ 直接替換聯絡詢價
查看資料表 →TP358
✅ 直接替換📋 參考替代品（不在目錄中）
SGMI8358
✅ 直接替換📋 參考替代品（不在目錄中）
NSMOP-358
✅ 直接替換📋 參考替代品（不在目錄中）
LM358AM 最大額定值與電氣特性
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Channels | 2 channels |
| Number of Amplifiers | 2 amplifiers |
| Channel Architecture | Two independent amplifiers |
| Compensation | Internally frequency compensated |
| Gain | High gain |
| Supply Configuration | Single-supply operation supported |
| 封裝 | 8-pin SOIC |
| 安裝類型 | Surface mount |
LM358AM 8-pin soic 腳位配置指南
LM358AM（8-pin soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LM358AM.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM358AM 適用於 6 應用s: Industrial Sensor Conditioning, Audio Preamplification, Current Sensing and Control, Comparator-Style Threshold Detection, Active Filtering and Signal Conditioning, Interface and Level Conditioning.
Industrial Sensor Conditioning
The LM358AM fits industrial sensor-conditioning circuits that require two general-purpose amplifier channels on a single positive supply. One channel can amplify or level-shift a sensor output, while the second can buffer the result or implement a threshold function. Its two independent, internally frequency-compensated amplifiers simplify board partitioning without requiring two separate packages. The principal design checks are the sensor's common-mode voltage and the LM358AM's input range, output swing, offset, and bandwidth. Because those numerical limits were not included in the verified records, the engineer should use the manufacturer datasheet to establish resistor values and confirm that the sensor remains within the amplifier's operating region.
推薦
Audio Preamplification
The LM358AM can provide basic audio preamplification or active gain stages where a low-cost, general-purpose dual amplifier is sufficient. The verified family description identifies low power consumption and high gain as relevant characteristics, while two independent channels allow one channel to handle the input signal and another to perform filtering or buffering. Designers must verify input noise, gain-bandwidth, output drive, and output-swing performance against the actual source impedance and load. The 8-SOIC footprint also simplifies mixed-signal PCB layout, although the output pin should remain away from sensitive input and feedback nodes to reduce coupling.
推薦
Current Sensing and Control
The LM358AM is suitable for basic current-sensing and closed-loop control arrangements using two independent amplifier channels. One channel can amplify a voltage proportional to current, and the other can buffer the signal or participate in threshold detection. This topology benefits from single-supply operation and internal frequency compensation, but the circuit must remain inside the amplifier's common-mode and output limits. Precision designs should also examine offset voltage and input-bias-current effects because exact LM358AM values were not present in the supplied evidence. Place the current-sense resistor and amplifier inputs where they are least susceptible to voltage-drop errors and switching noise.
推薦
Comparator-Style Threshold Detection
The two independent LM358AM channels can implement threshold detection and related control functions in embedded or industrial equipment. One channel may compare a conditioned signal with a reference, while the second drives an indicator, shapes a response, or supports hysteresis. The internally compensated, general-purpose architecture simplifies implementation of common closed-loop configurations. However, the engineer must verify output-swing limits because a comparator-like use can drive the output close to its rails. A suitable reference device and careful grounding are also important to prevent offset errors from creating false transitions, especially when the monitored signal crosses the detection threshold slowly.
推薦
Active Filtering and Signal Conditioning
The LM358AM can implement active filters, summing networks, and general analog signal-conditioning blocks when both channels and external passive components are assigned to separate functions. Internal frequency compensation makes it suitable for ordinary closed-loop amplifier arrangements without external compensation capacitors. The relevant performance checks are closed-loop stability, gain-bandwidth product, slew behavior, and the impedance presented by the source and load; these numerical values were not supplied and must be checked in the manufacturer datasheet. Keep feedback components close to their amplifier pins and maintain a low-impedance ground reference so filtering performance is not degraded by board parasitics or shared ground currents.
推薦
Interface and Level Conditioning
The LM358AM is useful for simple interface and level-conditioning tasks around embedded control systems because it combines two amplifiers in one 8-pin SOIC and supports single-supply operation. One channel can condition a logic-level or sensor signal, while the other can buffer it before an interface device. It can also assist with transistor-driver and level-shifting stages when the operating points remain inside the verified supply and common-mode limits. Careful grounding is essential when interfacing to digital devices: return the analog ground through a controlled path and place the bypass capacitor near the LM358AM supply pins. Review direction, logic thresholds, and timing compatibility separately because amplifier specifications alone do not guarantee digital-interface interoperability.
推薦
推薦產品摘要
工程參考資料，適用於 LM358AM — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM358DR | LM358-N | LM358AM | TP358 | SGMI8358 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | 3PEAK | SGMC |
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Amplifier Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
主要差異化特點
- Two-channel integration in a standard surface-mount footprint (對比LM358DR)
- Direct same-MPN sourcing across established manufacturers (對比onsemi LM358AM)
- Internally compensated general-purpose architecture (對比TP358)
- Established distributor sourcing options (對比SGMI8358)
設計說明
Use the exact SOIC-8 land pattern and verify the numbered pin assignment for the ordered manufacturer's datasheet before routing the PCB. Place the supply-bypass capacitor as close as practical to the positive supply and ground pins, with a short ground return. Keep output pins and feedback traces away from high-impedance input and sensor traces because parasitic capacitance in a feedback loop can alter stability. Confirm that exposed copper and assembly clearance match the selected package drawing.
Design the single-supply rail around the amplifier's common-mode and output-swing requirements rather than assuming full rail-to-rail behavior. The supplied records do not provide numerical supply or swing limits, so calculate the actual signal range before choosing resistor values. If the output must approach either rail, add the required headroom or select a rail-to-rail amplifier. Check supply-current demand against the regulator's thermal and transient capability at the lowest operating voltage.
Do not substitute any 8-pin dual op-amp solely because its package matches. Compare pinout, channel function, supply range, input common-mode range, output swing, offset voltage, gain-bandwidth product, slew rate, noise, temperature grade, and qualification. The verified replacement sources identify several LM358-family candidates, but a package-compatible footprint does not by itself prove electrical equivalence. Record the approved manufacturer and exact orderable suffix in production documentation.
Route the two amplifier channels so they do not share long, high-impedance input paths. Keep feedback resistors and any compensation capacitors adjacent to their associated pins, and avoid routing outputs beneath or directly beside sensitive input nets. Provide a continuous ground reference beneath the analog section where board area permits. If the LM358AM controls a switching circuit, separate its ground-return current from sensitive feedback nodes to reduce output-induced modulation.
合規資訊
The supplied verified records do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance must be confirmed for the exact manufacturer and orderable suffix.