LM358PT - Dual 3-32V Op Amp, 1.1MHz | STMicroelectronics
MPN: LM358PT ✓ فعالLM358PT نمای کلی
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs. The LM358 belongs to the dual-operational-amplifier category within the broader amplifier IC and analog semiconductor hierarchy. Its two independent channels can amplify AC or DC signals, buffer inputs, perform comparisons, and support feedback-based circuit functions. Internal frequency compensation simplifies stable operation without an external compensation network.
The principal features of the LM358PT include two amplifier channels in one package, a wide 3 V to 32 V supply range, 1.1 MHz unity-gain bandwidth, and 100 dB large-signal DC voltage gain. Internally compensated operation supports practical use without external compensation capacitors. The 8-pin TSSOP package also provides a compact surface-mount option for industrial control, instrumentation, sensor interfaces, and consumer equipment where board area matters.
Technically, the LM358PT is designed for single-supply operation while accepting input signals close to the lower supply rail. The verified 0.6 V input common-mode figure gives designers a concrete limit when working from a 3 V or 5 V rail. Its bandwidth is sufficient for many audio, control, and instrumentation signals, but it is not a high-speed precision op amp. Applications requiring very low offset, very low noise, rail-to-rail output, fast slew rate, or high DC accuracy should be reviewed against the device limits before production release.
Typical uses include sensor-signal conditioning, active filtering, transducers, relay and solenoid drivers, audio and communications interfaces, and general control loops. The two channels can process related signals in a compact circuit or implement separate functions. Because output-current capability and slew-rate limits remain important in real designs, the load should be checked against the manufacturer's operating information rather than assumed from the wide supply range.
A key design consideration is input common-mode range: the LM358PT can operate from 0.6 V above the negative supply, but it does not provide true rail-to-rail input or output swing. Designers should also account for the effects of supply bypassing, output loading, stability with capacitive loads, and the power dissipation created by the voltage difference across each amplifier.
This product record combines manufacturer and distributor information with a practical selection guide, package-aware alternatives, comparison parameters, and implementation notes. It is intended to help engineers confirm footprint, electrical fit, sourcing status, and application suitability before selecting LM358PT for a PCB redesign or new design.
جایگزین‌های drop-in برای LM358PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
LM2904PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LM358PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LM358PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LM358PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Amplifier Count | 2 amplifiers |
| Product Type | General-purpose operational amplifier |
| Number of Circuits | 2 circuits |
| Operating Supply Voltage Range | 3 V to 32 V |
| Supply Configuration | Single supply |
| Unity-Gain Bandwidth | 1.1 MHz |
| DC Voltage Gain | 100 dB |
| Input Common-Mode Voltage | 0.6 V |
| Frequency Compensation | Internal |
| Channel Independence | 2 independent amplifiers |
| بسته‌بندی | 8-pin TSSOP |
| نوع نصب | Surface mount |
| تعداد پایه | 8 pins |
| Supply Drain Dependence | Independent of supply-voltage magnitude |
پیکربندی پین LM358PT
| پین 1 | OUTA — Amplifier A output |
| پین 2 | INA- — Amplifier A inverting input |
| پین 3 | INA+ — Amplifier A non-inverting input |
| پین 4 | V- — Negative supply or ground in single-supply operation |
| پین 5 | INB+ — Amplifier B non-inverting input |
| پین 6 | INB- — Amplifier B inverting input |
| پین 7 | OUTB — Amplifier B output |
| پین 8 | V+ — Positive supply |
کاربردهای معمول
LM358PT مناسب است برای 6 کاربردs: Industrial Sensor Signal Conditioning, Transducer and Bridge Signal Interfaces, Audio and Communications Buffering, Active Filter and Control Loops, Relay and Solenoid Drive Support, Consumer and Communications Equipment.
Industrial Sensor Signal Conditioning
The LM358PT fits industrial sensor interfaces that require two independent analog channels and operation from a 3 V to 32 V single supply. Its 1.1 MHz unity-gain bandwidth provides useful response for many pressure, temperature, and position signals, while the 100 dB DC gain supports closed-loop amplification around suitable references. Each amplifier can condition one sensor or provide gain and filtering for another signal. The important boundary is the 0.6 V input common-mode voltage: a sensor output near ground may require biasing above that limit. Designers should also verify offset, input bias current, output swing, noise, and capacitive-load stability against the exact datasheet before using the part in high-accuracy measurement chains.
پیشنهادی
Transducer and Bridge Signal Interfaces
The LM358PT is appropriate for buffering and gain stages associated with resistive transducers and low-level bridge signals when the source can operate within a 3 V to 32 V supply. Two independent amplifiers allow separate input and feedback networks, and internal frequency compensation removes the need for external compensation capacitors in typical voltage-feedback service. Its 100 dB DC voltage gain can support high nominal closed-loop gain, although actual accuracy depends on resistor matching and the device's input offset characteristics. A practical design should account for common-mode limits, particularly the 0.6 V input specification, and include filtering or instrumentation stages when noise and sensor excitation requirements exceed the LM358PT's general-purpose positioning.
پیشنهادی
Audio and Communications Buffering
The LM358PT can serve as a general-purpose buffer or modest gain stage in audio and communications equipment because it offers two channels, 1.1 MHz unity-gain bandwidth, and operation from a single supply as low as 3 V. The two amplifiers can support source buffering, active gain stages, or simple tone-shaping networks when the signal bandwidth and load are within the device's capabilities. Its 0.6 V input common-mode floor is significant in single-supply audio circuits, since near-zero input signals must remain above that level. For high-fidelity audio paths, engineers should compare input-noise, output-current, slew-rate, and output-swing limits and consider a dedicated low-noise amplifier when those parameters are more important than cost and general-purpose simplicity.
پیشنهادی
Active Filter and Control Loops
The LM358PT's internally compensated amplifier channels are suitable for basic active-filter, comparator, and closed-loop control functions that operate within the LM358 family's bandwidth and output capabilities. A 1.1 MHz unity-gain bandwidth gives designers a concrete basis for selecting resistor and capacitor values in low-frequency filters, while 100 dB nominal DC gain supports useful loop gain. Internal compensation reduces component count, but does not remove the need to check noise gain, phase margin, output loading, and allowable capacitive load. The part is therefore well suited to slow analog loops and general control boards, but not precision servo systems or filters that require very high frequency, very low distortion, or rail-to-rail operation.
پیشنهادی
Relay and Solenoid Drive Support
The LM358PT can support low-level analog control around relays, solenoids, and actuator drivers in general-purpose equipment. Its two independent channels can provide error amplification, current-sense amplification, or buffer signals between a sensor and a discrete driver stage, while the 3 V to 32 V supply range supports both low-voltage logic and higher-voltage industrial control boards. The op amp should not drive a high-current relay or solenoid directly. Instead, it should monitor or amplify a control signal and provide a logic-level command to a suitable transistor or driver. Designers must verify output-current, output-voltage swing, saturation behavior, and stability when the following stage presents a large capacitive load.
پیشنهادی
Consumer and Communications Equipment
The LM358PT is well suited to compact consumer and communications circuits requiring two general-purpose amplifier channels, low supply-current operation, and a small TSSOP footprint. The 3 V minimum supply supports battery-derived and single-supply systems, while the 8-pin package simplifies board-area-constrained layouts. Typical uses include interface buffering, gain adjustment, thresholding, and signal conditioning around a controller or communications transceiver. Because the LM358PT is not a rail-to-rail precision amplifier, its 0.6 V input common-mode limit and unspecified output swing must be checked at the actual signal levels. For systems requiring low-noise audio, high-accuracy measurement, or operation very close to either supply rail, a more specialized amplifier is preferable.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LM358PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LM2904PT | LM358PT | LM358PT |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | ROHM Semiconductor | Texas Instruments |
| Package | TSSOP-8 | TSSOP-8 - same | TSSOP-8 - same | TSSOP-8 - same |
| Amplifier Count | 2 | 2 | 2 | 2 |
| Operating Supply Voltage | 3 V to 32 V | 3 V to 32 V | 3 V to 32 V | 3 V to 32 V |
| Unity-Gain Bandwidth | 1.1 MHz | 1.1 MHz | 1.1 MHz | 1.1 MHz |
| DC Voltage Gain | 100 dB | 100 dB | 100 dB | 100 dB |
| Input Common-Mode Voltage | 0.6 V | 0.6 V | 0.6 V | 0.6 V |
| Frequency Compensation | Internal | Internal | Internal | Internal |
| Temperature Grade | Standard commercial LM358 family | LM2904 industrial or automotive family positioning | Standard LM358 family | Standard LM358 family |
تفاوت‌های کلیدی
- Two independent general-purpose channels in one TSSOP package (در مقابلLM324D)
- Lower verified starting unit price (در مقابلLM2904PT)
- Wide single-supply operating range (در مقابلLM358PT from ROHM Semiconductor)
یادداشت‌های طراحی
Do not treat the 3 V to 32 V supply rating as a rail-to-rail operating range. The verified input common-mode value is 0.6 V, so inputs on a 3 V or 5 V supply may need biasing before amplification. Likewise, output swing and current limits must be checked in the manufacturer electrical tables. For low-voltage sensor outputs near ground, use an amplifier with rail-to-rail input or bias the LM358PT signal into its valid common-mode window.
Place the supply bypass capacitor close to pin 8, with a short return path to pin 4, and keep the analog input traces away from switching nodes and high-current relay or motor paths. The two amplifier channels are independent, but sharing sensitive sensor inputs between them can allow one channel's output disturbance to appear at the other. Use a common ground reference and avoid long, high-impedance traces where offset and noise-sensitive applications are involved.
Although the LM358PT is internally frequency-compensated, stability still depends on the selected feedback network and output load. Check the datasheet before driving a capacitive input, long cable, or ADC sampling network. Add an isolation resistor when required by the manufacturer guidance, and compare the source and sink output-current limits under the selected load. A nominally correct feedback connection can otherwise produce oscillation or asymmetric output behavior.
اطلاعات انطباق
The verified web data did not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for this ordering code. The standard LM358 family is not automotive-qualified by default; use LM2904-family ordering when automotive qualification is required.
