LM358DMR2 - Dual 3-32V Low-Power Op Amp | onsemi
MPN: LM358DMR2 ✓ AktifLM358DMR2 Genel Bakış
An operational amplifier is an active analog component that amplifies the voltage difference between its inverting and non-inverting inputs. The LM358 belongs to the dual-operational-amplifier family within the broader linear-IC and signal-chain hierarchy. Its common-mode input range, low power consumption, and ability to operate close to the negative supply rail make it useful for battery-powered equipment, industrial controls, transducers, and general-purpose embedded systems.
Key characteristics include typical input offset voltage of 3 mV, typical input offset current of 2 nA, typical input bias current of 20 nA, and typical supply-current drain of 0.7 mA per amplifier. The differential input range is equal to the maximum rated supply voltage. These specifications support precision-oriented applications where offset, bias current, power consumption, and usable input range must be balanced rather than optimized for only one parameter.
The LM358DMR2 contains two independent, internally frequency-compensated amplifiers. Internal compensation simplifies closed-loop implementation because no external compensation network is required for ordinary voltage-feedback use. The dual configuration reduces component count in designs that need two gain stages, differential sensing, or multiple analog channels, while the common 8-MSOP footprint supports compact surface-mount assemblies.
Typical uses include low-side current sensing, sensor amplification, buffer stages, threshold detection, and feedback loops in industrial and consumer equipment. Its ground-referenced common-mode capability is particularly useful for circuits powered from a single positive rail, where the signal may approach 0 V. For split-supply systems, operation can extend down toward VEE, subject to the applicable input and output limits.
PCB design should keep feedback routing short, place input and output decoupling close to the device, and provide stable reference and return paths. Avoid placing long high-impedance traces beside switching nodes. The output must remain within its rated swing range, and applications must verify that the selected gain, load, supply voltage, and temperature remain within the device limits.
This product page combines the exact LM358DMR2 ordering information with electrical characteristics, a complete 8-pin assignment, application guidance, PCB considerations, and a strict assessment of drop-in replacement evidence. The replacement section avoids presenting pin-compatible parts with different package outlines as direct substitutions.
Drop-in alternatifler için LM358DMR2 — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu ürüne yer değiştirme seçenekleri mevcut değil.
Alternatifleri Talep EdinLM358DMR2 Maksimum Değerlendirmeler & Elektriksel Özellikler
| Amplifier Type | 2 channels |
| Product Classification | Standard general-purpose amplifier |
| Supply Voltage Range | 3 V to 32 V |
| Number of Amplifier Channels | 2 |
| Pin Sayısı | 8 |
| Paket | 8-MSOP |
| Montaj Türü | Surface mount |
| Supply Configuration | Single supply or split supply |
| Common-Mode Input Range | Extends to ground and VEE |
| Typical Input Offset Voltage | 3 mV |
| Typical Input Offset Current | 2 nA |
| Typical Input Bias Current | 20 nA |
| Typical Supply-Current Drain | 0.7 mA per amplifier |
| Differential Input Voltage Range | Equal to the maximum-rated supply voltage |
| Internal Frequency Compensation | Internally compensated |
LM358DMR2 Pin Yapısı
| Pin 1 | OUT1 — Amplifier 1 output |
| Pin 2 | IN1- — Amplifier 1 inverting input |
| Pin 3 | IN1+ — Amplifier 1 non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | IN2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN2- — Amplifier 2 inverting input |
| Pin 7 | OUT2 — Amplifier 2 output |
| Pin 8 | V+ — Positive supply connection |
Tipik Uygulamalar
LM358DMR2 için uygundur 6 uygulamas: Low-Side Current Sensing, Industrial Sensor Conditioning, Battery-Powered Data Acquisition, Audio Control and Feedback Loops, Threshold Detection and Control, Portable Measurement Module.
Low-Side Current Sensing
The LM358DMR2 fits low-side current sensing because its common-mode input range extends to ground and its 3 V to 32 V operating range supports both compact battery systems and higher-voltage industrial rails. Place the amplifier across a low-ohm shunt resistor so the small differential signal is amplified relative to the grounded common-mode range. The dual configuration can also amplify a temperature or voltage reference channel. Check the shunt voltage against the input range, account for the typical 3 mV offset when sizing the minimum detectable current, and confirm that the output remains within the amplifier's allowable swing.
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Industrial Sensor Conditioning
The LM358DMR2 is appropriate for conditioning grounded sensor signals in industrial control equipment because its common-mode range extends to VEE and it can operate from a single 3 V to 32 V supply. A non-inverting or differential stage can amplify a temperature, pressure, or position sensor output while keeping the signal path compact. Its 0.7 mA typical supply-current drain per amplifier reduces supply demand in distributed instrumentation. Design the surrounding filter for sensor bandwidth, provide biasing when the source cannot sink current, and verify that the selected operating temperature meets the enclosure requirements.
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Battery-Powered Data Acquisition
The LM358DMR2 suits battery-powered data-acquisition modules that measure signals close to ground because the common-mode input range includes ground and the typical supply-current drain is 0.7 mA per amplifier. Its two channels can process a sensor input and a reference or threshold signal without requiring two separate packages. Low power consumption helps preserve battery capacity, but system-level results also depend on sensor biasing, leakage, resistor selection, and the duty cycle. Check the 3 V lower operating limit and confirm the maximum input and output excursions at the highest battery voltage.
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Audio Control and Feedback Loops
The LM358DMR2 can be used in audio control loops where the input remains within the amplifier's common-mode range and rail-to-rail operation is not required. Its dual internally compensated channels support independent error amplifiers, buffer stages, or active feedback functions in control and monitoring systems. The 3 V to 32 V supply range accommodates multiple system rails. Keep the feedback loop compact, observe output-swing limits under load, and use separate RC shaping where stability or bandwidth must be controlled. For very low audio noise, compare the offset and noise performance against a dedicated audio-grade amplifier.
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Threshold Detection and Control
The LM358DMR2 is well suited to threshold detection because one channel can compare a sensor signal with a reference and the other can provide additional conditioning or an inverted control function. The common-mode input range extending to ground supports 3 V single-supply designs with near-zero signal thresholds. Use a stable reference and resistor tolerances that match the required threshold accuracy, and include hysteresis when noise could cause repeated switching. Verify output drive against the logic family and load, and keep comparator-like response requirements within the operational amplifier's intended application range.
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Portable Measurement Module
The LM358DMR2 fits a portable measurement module requiring two general-purpose analog channels in a compact surface-mount package. One amplifier can condition the primary sensor while the other handles gain, buffering, or a reference-derived signal. Its 3 V to 32 V supply range provides flexibility across portable and industrial input rails, while the 8-MSOP package supports higher board density. Minimize leakage around high-impedance inputs, use guarding or shielding where needed, and confirm that the module's full input range, output swing, noise, and temperature span are compatible with the device.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: LM358DMR2 — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün |
|---|---|
| Package | 8-MSOP |
| Brand | onsemi |
| Amplifier Channels | 2 |
| Supply Voltage Range | 3 V to 32 V |
| Typical Input Offset Voltage | 3 mV |
| Typical Input Offset Current | 2 nA |
| Typical Input Bias Current | 20 nA |
| Typical Supply-Current Drain | 0.7 mA per amplifier |
| Common-Mode Input Range | Extends to ground and VEE |
| Supply Configuration | Single supply or split supply |
Ana Farklılayıcılar
- Ground-referenced input capability (karşılaştırma:LM358DGKR)
- Wide operating supply range (karşılaştırma:LM358DMR2G)
- Compact dual integration (karşılaştırma:LM358N)
Tasarım Notları
Place the supply bypass capacitor immediately between pins 8 and 4, with a short return path to the ground or negative-supply plane. Route the non-inverting input directly to the source when possible, and keep the inverting-input and feedback loop compact. A longer input trace increases leakage pickup and sensitivity to nearby switching circuits. For high-impedance sensors, use a guarded input and consider adding filtering close to the amplifier rather than at the connector.
Do not assume that the full supply range is available at the input or output. The common-mode range extends to ground and VEE, but the maximum input excursion and output swing have separate limits. Also avoid treating this general-purpose amplifier as a rail-to-rail comparator: propagation delay, output behavior, and saturation recovery can make a dedicated comparator preferable for fast switching. Confirm gain stability for capacitive loads and ensure feedback compensation is appropriate for the selected topology.
Separate the two analog channels when one handles a sensitive sensor and the other switches or drives a faster signal. Keep feedback traces away from supply inductors, relay contacts, and digital clock lines. Use a solid reference plane and place input filtering components near the source. If the input source has high output impedance, include the amplifier's typical 20 nA input bias current in the bias-resistance design so that bias-current-induced error remains below the signal tolerance.
Estimated: with a 5 V supply and one channel loaded at 1 mA, the ideal output is near 3.5 V, giving an estimated channel dissipation of 1.5 mW and a total device dissipation near 3 mW using the typical 0.7 mA per-amplifier supply-current drain. Actual dissipation rises with supply voltage and load current. Validate thermal performance over the highest ambient temperature and confirm the output-current limit under the intended load.
Uyumluluk Bilgisi
The available product information identifies LM358DMR2 as a general-purpose onsemi amplifier but does not provide specific RoHS, REACH, halogen-free, conflict-minerals, or automotive-qualification declarations. AEC-Q100 is treated as not applicable because the ordering code is not identified as an automotive-qualified variant.
