LM358DRE4 - Dual 8-SOIC General-Purpose Op Amp | Texas Instruments
Teilenummer: LM358DRE4 ✓ AktivLM358DRE4 Übersicht
An operational amplifier is an analog semiconductor that amplifies the voltage difference between its differential inputs. The LM358 belongs to the general-purpose operational-amplifier class, within the broader hierarchy of analog amplifiers, amplifiers, and semiconductor signal-conditioning devices. Its internally compensated architecture simplifies design because an external compensation network is not required for ordinary closed-loop applications.
The principal feature of the LM358DRE4 is its combination of two amplifiers in one 8-pin SOIC. This allows a dual circuit, such as a two-stage filter or an instrumentation amplifier front end, to occupy one PCB footprint. The two amplifiers are independent, allowing them to process different signals or implement separate gain stages. The device is supplied in a compact surface-mount package and is arranged for tape-and-reel manufacturing.
According to the Texas Instruments product description, the LM358 devices consist of two independent, high-gain, frequency-compensated operational amplifiers designed for single-supply or split-supply operation. Frequency compensation stabilizes closed-loop behavior in typical amplifier configurations, while the high gain supports useful amplification from small sensor and control signals. Its dual architecture can also reduce component count and simplify routing when two related analog channels must be processed.
Typical applications include low-level sensor amplification, transducer signal conditioning, current-loop interfaces, audio preamplification, comparators, and general-purpose analog control. The same package and pin arrangement can simplify multi-channel designs when a board needs two amplifier functions but does not require high precision, rail-to-rail input/output operation, or unusually low offset voltage.
Designers should verify the operating supply range, input common-mode range, output swing, offset voltage, bias current, slew rate, and channel behavior against the current Texas Instruments datasheet before fixing the power architecture. Decoupling capacitors should be placed close to the supply pins, and unused amplifier inputs should be tied to a defined potential near the active signal range to avoid unintended behavior.
This product page consolidates package, application, replacement, and design information for engineers evaluating the LM358DRE4. It also identifies same-footprint alternatives, highlights differences that affect replacement decisions, and provides practical guidance for decoupling, signal routing, and analog layout.
Drop-in-Alternativen für LM358DRE4 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit LM358DRE4 (gleiche Bauform und Footprint) – abweichend in Package, Mounting Type, Amplifier Type, Architecture, Package Length.
LM358BIDR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LM358BAIDR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LM2904P3
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →LM2904PW
✅ Drop-InPreis auf Anfrage
Datenblatt ansehen →LM358DRE4 Grenzwerte & elektrische Eigenschaften
| Number of Amplifiers | 2 circuits |
| Amplifier Type | General Purpose |
| Architecture | Two independent, high-gain, frequency-compensated operational amplifiers |
| Supply Configuration | Single supply or split supply |
| Gehäuse | 8-SOIC |
| Package Width | 3.90 mm |
| Package Length | 0.154 inch |
| Packaging | Tape and reel |
| Montageart | Surface mount |
| Anzahl der Pins | 8 pins |
| Input Type | Differential input |
| Compensation | Internal frequency compensation |
LM358DRE4 Pin-Konfiguration
| Pin 1 | OUT1 — Output of amplifier 1 |
| Pin 2 | IN1- — Inverting input of amplifier 1 |
| Pin 3 | IN1+ — Non-inverting input of amplifier 1 |
| Pin 4 | GND — Ground connection |
| Pin 5 | IN2+ — Non-inverting input of amplifier 2 |
| Pin 6 | IN2- — Inverting input of amplifier 2 |
| Pin 7 | OUT2 — Output of amplifier 2 |
| Pin 8 | V+ — Positive supply connection |
Typische Anwendungen
LM358DRE4 ist geeignet für 6 Anwendungs: Industrial Sensor Signal Conditioning, Audio Preamplification, Current-Loop Interface Amplifier, Active Filtering and Control Loops, Power Supply Feedback and Monitoring, Comparator and Threshold Circuit.
Industrial Sensor Signal Conditioning
The LM358DRE4 is suitable for amplifying low-level sensor signals before conversion or control because it provides two independent, internally frequency-compensated amplifiers in one 8-SOIC package. One channel can amplify the sensor output while the other can provide buffering, gain, or an active-filter stage, reducing board area and component count. The dual architecture does not couple the two amplifiers, so separate channels can process unrelated signals. Design the input network around the sensor’s impedance and bandwidth, and confirm that the operating point remains inside the device’s input common-mode range and output-swing limits. Supply-pin bypassing and short, shielded analog routing are important when the sensor signal is small or the surrounding equipment contains switching noise.
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Audio Preamplification
The two channels in the LM358DRE4 can implement cascaded audio preamplifier stages or serve as separate mono-channel amplifiers in a general-purpose analog design. Its frequency-compensated architecture supports conventional closed-loop operation and can reduce the component count compared with two separate single amplifiers. Audio suitability depends on the required gain, bandwidth, slew rate, output swing, and noise floor rather than package alone. Keep input leads short, use a low-noise reference for gain-setting resistors, and provide adequate supply decoupling. For high-fidelity or wide-band audio paths, compare the LM358 with a dedicated low-noise amplifier whose gain-bandwidth product and distortion specifications better match the signal.
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Current-Loop Interface Amplifier
The LM358DRE4 can serve in current-to-voltage conversion and buffer stages used by industrial process-control systems. Because the device contains two independent amplifiers, one stage can perform the conversion while the other buffers the result or implements filtering before an ADC. The application requires the loop current to stay within the input range, the amplifier output to remain within its swing limits, and the circuit to operate from the selected supply rail without clipping. Check input bias current against the sensor-loop impedance to avoid errors, especially in high-impedance implementations. The compact 8-SOIC footprint also supports compact analog interface boards where board area is constrained.
Empfohlen
Active Filtering and Control Loops
The LM358DRE4 is useful for basic active filters, integrators, error amplifiers, and analog control loops because each internally compensated amplifier can be configured with external resistors and capacitors. Two channels allow a filter to be followed by an output buffer or permit two related control functions to share a package. Select resistor and capacitor values for the intended cutoff or integration behavior, and verify loop stability across the complete signal range. Decoupling capacitors near the supply pin reduce the chance that supply impedance contributes extra gain or instability. Where precision or rail-to-rail operation is essential, compare the device with a higher-accuracy amplifier instead of assuming that a standard general-purpose dual amplifier is appropriate.
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Power Supply Feedback and Monitoring
The LM358DRE4 can monitor a supply rail and amplify the difference between a sensed voltage and a reference for feedback or fault-detection circuits. Two independent channels allow separate signals, such as output voltage and current, to be conditioned before comparison. The implementation must keep sensed voltages within the input common-mode range and must account for amplifier offset when setting small thresholds. Place the sensing trace away from high-current switching paths, use a Kelvin-style connection where practical, and place bypass capacitance at the device supply pins. The LM358 is appropriate for general monitoring, but a dedicated supervisor should be selected when fast fault response, a defined reset delay, or guaranteed threshold accuracy is required.
Empfohlen
Comparator and Threshold Circuit
The LM358DRE4 can be used as a comparator when an analog signal must be referenced to a threshold, although its behavior and switching characteristics should be checked against the application’s timing and saturation requirements. The two channels can implement separate threshold detections or combine a level comparison with an additional gain or filtering stage. Reference resistors should use a stable low-noise reference, and the output must remain within its valid swing range. Add positive feedback when hysteresis is needed, while ensuring the feedback network does not introduce oscillation. For systems requiring dedicated logic-compatible outputs, rail-to-rail inputs, very low offset, or fast response, compare the LM358 with a purpose-built comparator.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LM358DRE4 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LM358BIDR | LM358BAIDR | LM2904P3 | LM2904PW |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Circuits | 2 | 2 | 2 | 2 | 2 |
Wichtigste Unterscheidungsmerkmale
- Two independent amplifiers share one compact 8-SOIC package (vs. LM358BIDR)
- General-purpose frequency-compensated operation from single or split supplies (vs. LM2904P3)
- Tape-and-reel ordering for automated surface-mount assembly (vs. LM2904PW)
Designhinweise
Place the supply bypass capacitor directly between pin 8 and pin 4, with the shortest practical ground return. Keep amplifier input and feedback traces away from switching nodes, high-current inductor paths, and clock signals. A solid ground plane reduces return-path discontinuities, while minimizing input-loop area helps limit susceptibility to common-mode noise in sensor and audio applications.
Do not assume that two amplifiers in one package can be used outside the device’s input common-mode range. Check both the signal excursion and output swing at the selected supply voltage. When one channel is unused, connect its non-inverting input to a defined reference within the common-mode range and its inverting input to the same point to prevent unstable output behavior.
Use feedback resistors with practical noise and temperature characteristics, and keep the feedback loop compact. For capacitive loading, isolate the amplifier with a small isolation resistor and verify stability with the intended source and load. In gain-setting networks, account for the input bias current and offset voltage rather than relying only on nominal resistor ratios.
Compliance-Informationen
The LM358DRE4 product and distributor records do not state a definitive compliance status. Confirm RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification status in the current manufacturer documentation before release to production.
