LM358DG - Dual 1 MHz Operational Amplifier | onsemi
부품 번호: LM358DG ✓ 활성LM358DG 개요
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification and feedback to control gain accurately. The dual LM358 architecture provides two amplifiers in one package, reducing board area while offering independent input, output, and supply connections. The LM358 belongs to the operational-amplifier hierarchy, which also includes single and quad amplifier packages used in instrumentation, sensor interfaces, and power-management systems.
Key characteristics include a 3 V to 32 V supply range, 1 MHz gain-bandwidth product, 0.6 V/µs slew rate, and a common-mode rejection ratio listed at a minimum of 65 dB. Input offset voltage is listed as 7 mV. The common-mode input voltage range extends to ground or VEE, allowing the amplifier to process signals near the lower supply rail. Low power drain and single- or split-supply flexibility suit both portable and industrial equipment.
The dual amplifier can be used in noninverting and inverting gain stages, voltage followers, comparators, differential amplifiers, current-to-voltage converters, and sensor-signal conditioning. Independent channels allow one package to implement two related analog functions while sharing the same supply pins. However, users should verify input/output swing limits, output-current capability, stability conditions, and absolute maximum ratings in the manufacturer datasheet for the exact operating point.
For PCB design, place the bypass capacitor close to the supply pin and route each amplifier's feedback and input traces away from switching nodes and high-current paths. Because the common-mode range extends toward ground but not necessarily beyond the positive rail, input signals must remain inside the specified common-mode limits. Stable feedback-network layout and adequate output-load compatibility are essential for reliable closed-loop behavior.
This product page combines verified manufacturer and distributor information, same-footprint replacement candidates, parameter comparisons, and practical implementation guidance. It is intended to help engineers identify whether the LM358DG's dual-channel, wide-supply, near-ground-input capability fits a design before consulting the full manufacturer datasheet.
드롭인 대체품: LM358DG — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LM358DG (동일 폼 팩터 및 풋프린트) — 차이점: Package, Slew Rate, Amplifier Type, Gain-Bandwidth Product, Common-Mode Input Range.
LM358DR2G
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM358DR
✅ 드롭인가격 문의
데이터시트 보기 →LMV358IDR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MCP6002-I/SN
✅ 드롭인가격 문의
데이터시트 보기 →TP358
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SGMI8358
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
BP358
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM358DG 최대 정격 & 전기적 특성
| Number of Amplifier Channels | 2 channels |
| Product Type | Dual operational amplifier |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 0.6 V/µs |
| 동작 공급 전압 | 3 V to 32 V |
| Minimum Common-Mode Rejection Ratio | 65 dB |
| Input Offset Voltage | 7 mV |
| Common-Mode Input Voltage Range | Extends to ground/VEE |
| Supply Configuration | Single supply or split supply |
| Power Drain | Low power drain |
| Temperature Grade | Commercial |
| 패키지 | 8-SOIC |
| 핀 수 | 8 pins |
| 실장 유형 | Surface mount |
LM358DG 핀 구성
| 핀 1 | OUT1 — Amplifier 1 output |
| 핀 2 | IN1− — Amplifier 1 inverting input |
| 핀 3 | IN1+ — Amplifier 1 non-inverting input |
| 핀 4 | V− — Negative supply or ground |
| 핀 5 | IN2+ — Amplifier 2 non-inverting input |
| 핀 6 | IN2− — Amplifier 2 inverting input |
| 핀 7 | OUT2 — Amplifier 2 output |
| 핀 8 | V+ — Positive supply |
일반적인 애플리케이션
LM358DG 적합 용도: 6 애플리케이션s: Industrial Sensor Signal Conditioning, Battery-Powered Monitoring Circuit, Current-to-Voltage Conversion, Audio and Instrumentation Buffering, Power Supply Monitoring and Control, Communication Interface Conditioning.
Industrial Sensor Signal Conditioning
The LM358DG fits industrial sensor interfaces that require two amplifier channels, a 3 V to 32 V supply range, and an input common-mode range extending toward ground. One channel can amplify a sensor signal while the other provides buffering, gain, or active filtering. Its 1 MHz gain-bandwidth product supports practical low-bandwidth conditioning, and the 0.6 V/µs slew rate provides ample response for many slowly varying sensor signals. The design must still verify the actual sensor output range against the LM358 common-mode limits and maintain adequate feedback stability with the selected resistive and capacitive network.
추천
Battery-Powered Monitoring Circuit
The LM358DG is appropriate for low-power battery monitoring when two signal paths are needed in one 8-SOIC package. Its low-power-drain characteristic, ability to operate from a single supply, and common-mode input range extending to ground are useful when measuring sensor or battery-divider voltages near the lower rail. The 3 V to 32 V operating range also allows the same amplifier family to address multiple portable supply levels. Designers should calculate the quiescent-current contribution and verify the output swing at the minimum supply because the provided data does not state a complete battery-life model.
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Current-to-Voltage Conversion
The LM358DG can serve as the active element in a current-to-voltage converter when the measured current is represented by a shunt voltage and the required signal bandwidth remains below the amplifier's 1 MHz gain-bandwidth capability. The dual configuration allows a second channel to amplify the transimpedance stage or provide output filtering. With a 3 V to 32 V supply and a common-mode range extending toward ground, the device is suited to grounded shunt measurements. Shunt dissipation, input offset voltage of 7 mV, output swing, and load impedance must be evaluated to prevent saturation or measurement error.
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Audio and Instrumentation Buffering
The LM358DG provides two general-purpose amplifier channels for audio preamplifier buffering, level shifting, and instrumentation interfaces where a single low-noise audio IC is unnecessary. Its dual architecture reduces component count, while the 1 MHz gain-bandwidth product and 0.6 V/µs slew rate cover many low-frequency audio and control paths. The common-mode input range extending to ground helps when processing bipolar signals from a single supply. For high-fidelity audio, the 7 mV listed input offset and 65 dB minimum common-mode rejection should be checked against the system noise and distortion budget.
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Power Supply Monitoring and Control
The LM358DG can monitor a power rail and provide an amplified control or fault signal in industrial, communication, or embedded systems. Its 3 V to 32 V operating range is useful across broad supply systems, while the near-ground common-mode input range supports monitoring of low-voltage divided rail signals. Two channels may implement rail sensing plus threshold comparison or error amplification. The selected external resistors determine the scaling and input bias-current error, and the output must remain within the amplifier's load and swing limits. Additional protection and isolation may be required at higher bus voltages.
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Communication Interface Conditioning
The LM358DG is suitable for conditioning slow logic, sensor, or receiver signals around a communication module when two channels and moderate bandwidth are sufficient. A 1 MHz gain-bandwidth product and 0.6 V/µs slew rate can support low-rate digital or analog signaling, while the extended input common-mode range helps with single-supply interfacing. The amplifier can add level shifting or threshold amplification ahead of a controller or transceiver. Designers must verify logic thresholds, input bias current, noise margins, and output drive at the connected load because those parameters are not fully present in the supplied excerpts.
추천
추천 제품 요약
엔지니어링 참조 데이터: LM358DG — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LM358DR2G | LM358DR | LMV358IDR | MCP6002-I/SN | TP358 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | Texas Instruments | Texas Instruments | Microchip Technology | 3PEAK |
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Number of Channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
주요 차별점
- Two independent amplifiers in one 8-SOIC package (vs LM358N)
- Broad 3 V to 32 V operating supply range (vs MCP6002-I/SN)
- Near-ground input capability (vs MCP6002-I/SN)
- Same-family footprint option with highest compatibility (vs TP358)
설계 노트
Connect the supply bypass capacitor directly between pin 8 and pin 4, with the positive terminal at pin 8 and the ground or negative-supply return at pin 4. Keep the loop short and place the capacitor beside the device rather than at the power-entry point. For single-supply operation, pin 4 is ground; for split supply, it connects to the negative rail. Confirm the capacitor value and permitted supply-decoupling network in the onsemi manufacturer datasheet.
Route the two channels separately to prevent feedback from amplifier 1 from coupling into amplifier 2. Keep non-inverting inputs short, use a compact ground return around each input reference, and avoid routing inputs beside the pin 8 supply trace or digital switching nodes. Place the feedback resistors close to the relevant input pins and use a solid ground plane. Although both amplifiers share one package and supply, their signal paths should not be treated as a single trace.
Do not assume that a common-mode range extending to ground means the output can also swing fully to ground under every load. Check output swing, load current, supply voltage, and stability requirements in the manufacturer datasheet before using the LM358DG as a rail-to-rail buffer. Inputs must remain within the common-mode range, and the 7 mV listed input offset can be significant in precision measurements. A drop-in-family substitute also requires verification of these conditions.
Select feedback resistors and capacitors for the required closed-loop bandwidth rather than using the 1 MHz gain-bandwidth figure as an unconditional operating limit. The usable bandwidth depends on closed-loop gain, noise gain, slew rate, load capacitance, and source impedance. Keep the input source impedance balanced where practical to reduce offset-current error, and add compensation only according to the amplifier's stability and capacitive-load guidance in the onsemi datasheet.
규정 준수 정보
The supplied excerpts mention a RoHS details field but do not state its value. No verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was provided.
