LM2904DMR2G - Dual 3-26V Low-Power Op Amp | onsemi
MPN: LM2904DMR2G ✓ Hoạt độngLM2904DMR2G Tóm tắt
An operational amplifier is a voltage-gain building block used throughout analog electronics. Its differential input stage compares two input voltages and drives an output to amplify the difference between them. The LM2904 belongs to the bipolar operational-amplifier hierarchy, combining two amplifier channels in one package for general-purpose precision, control, and instrumentation applications.
The LM2904DMR2G provides two amplifier circuits, a gain-bandwidth product of 1 MHz, and a maximum supply voltage of 32 V. Its specified operating temperature range is -40°C to 105°C. The 3 V to 26 V operating supply range supports low-voltage systems as well as higher-voltage industrial circuits when the total supply and input limits are observed.
The bipolar internal design favors low-cost, general-purpose signal conditioning rather than rail-to-rail input or output operation. Its common-mode input range extending to ground or VEE is particularly useful with single-supply sensors whose signals remain near the lower rail. Single-supply and split-supply operation gives designers flexibility when building signal paths around positive-only or bipolar reference voltages.
Typical uses include low-side current monitoring, pressure and temperature sensor interfaces, audio preamplifier stages, industrial control loops, and general amplifier or buffer configurations. The two independent channels can process different signals or implement a more complete analog function within one compact 8-MSOP package.
Designers should check input and output common-mode limits at the selected supply voltage and load current. Stable operation with capacitive loads may require an isolation resistor or an application-specific compensation network. PCB placement should keep input and feedback traces short, provide a stable ground reference, and avoid routing sensitive signals beside switching nodes or high-current power paths.
This page combines the LM2904DMR2G package and operating characteristics with practical design guidance, verified drop-in candidates, application analysis, and a parameter-by-parameter comparison. It is intended to help engineers confirm compatibility, assess supply and thermal margins, and select an amplifier that can be implemented without unnecessary PCB redesign.
Bộ thay thế dễ dàng lắp đặt cho LM2904DMR2G — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM2904DMR2G (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Package Width.
LM2904VDMR2G
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2904ADMR2G
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2904DMR2G Tỷ lệ tối đa & tính chất điện
| Amplifier Type | General-purpose operational amplifier |
| Number of Amplifier Circuits | 2 circuits |
| Operating Supply Voltage Range | 3 V to 26 V |
| Maximum Supply Voltage | 32 V |
| Gain-Bandwidth Product | 1 MHz |
| Khoảng nhiệt độ hoạt động | -40°C to 105°C |
| Hộp | 8-MSOP |
| Số chân | 8 pins |
| Package Length | 3 mm |
| Package Width | 3.9 mm |
| Technology | Bipolar |
| Kiểu lắp đặt | SMD/SMT |
| Supply Configuration | Single supply or split supply |
| Common-Mode Input Range | Extends to ground or VEE |
| Power Consumption | Low power drain |
Hướng dẫn cấu hình chân LM2904DMR2G 3.9 mm
Cấu hình chân cho LM2904DMR2G (3.9 mm gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM2904DMR2G.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2904DMR2G phù hợp cho 6 Áp dụngs: Low-Side Current Monitoring, Industrial Sensor Interfacing, Audio Preamplifier Stages, Process-Control Feedback Loops, Data Acquisition Front Ends, General-Purpose Buffering.
Low-Side Current Monitoring
The LM2904DMR2G is suitable for amplifying the small voltage produced by a low-side current-sense resistor. Its two amplifier channels can form a gain stage and an output buffer, while the 1 MHz gain-bandwidth product supports bandwidths well below the amplifier limit. The 3 V to 26 V supply range accommodates 5 V, 12 V, and 24 V systems. Keep the input common-mode voltage inside the operating limits, and use a Kelvin connection from the sense resistor to minimize errors from copper resistance.
Được đề xuất
Industrial Sensor Interfacing
The LM2904DMR2G fits sensor-amplifier stages operating from industrial 12 V or 24 V rails. Its common-mode input range extends toward ground or VEE, making it useful for sensors whose output is close to the lower rail. The -40°C to 105°C operating range covers many industrial environments, and the 1 MHz bandwidth supports common pressure, temperature, and position sensing signals. Confirm that the sensor output stays within the common-mode limits and add filtering appropriate to the measured bandwidth.
Được đề xuất
Audio Preamplifier Stages
The two channels in LM2904DMR2G can implement small-signal audio preamplifier or buffering stages where a general-purpose bipolar amplifier is sufficient. The 1 MHz gain-bandwidth product permits moderate closed-loop bandwidth, while the dual package reduces the number of active components. The LM2904DMR2G is more appropriate for low-frequency microphone or line-level conditioning than for high-fidelity audio paths requiring low noise, wide bandwidth, or rail-to-rail output. Use short, shielded signal traces and verify output swing against the selected supply voltage.
Được đề xuất
Process-Control Feedback Loops
The LM2904DMR2G can serve as the amplifier in a basic industrial process-control loop by conditioning a sensor reference and driving a control stage. Its 1 MHz gain-bandwidth product is ample for many slow thermal, level, or pressure loops, while dual channels can be assigned to separate signal paths. The 3 V to 26 V supply range supports common control hardware. Validate loop stability, output-current demand, and saturation recovery at the minimum expected loop gain before deployment.
Được đề xuất
Data Acquisition Front Ends
The LM2904DMR2G can provide differential gain and buffering ahead of an ADC in a general-purpose acquisition system. Its 1 MHz gain-bandwidth product is suitable for many low-frequency measurements, and the common-mode input range extending toward ground or VEE helps when the source operates near the lower rail. The two channels can amplify a differential sensor signal or buffer multiple inputs. Verify ADC input range, settling time, noise, and common-mode compatibility as a complete signal chain.
Được đề xuất
General-Purpose Buffering
The LM2904DMR2G is appropriate for unity-gain or moderate-gain buffering when source and sink capability, offset, and noise meet the circuit requirements. Two channels provide independent buffers in a single 8-MSOP package, helping conserve PCB area in dense analog designs. Its 3 V to 26 V supply range supports several industrial and embedded rails. Account for input and output swing limits, load capacitance, and output-current demand; otherwise, a buffer can introduce unexpected distortion or instability.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2904DMR2G — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM2904VDMR2G | LM2904ADMR2G |
|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | onsemi | onsemi | onsemi |
| Amplifier Channels | 2 circuits | 2 circuits | 2 circuits |
Bảo phân biệt quan trọng
- Two general-purpose amplifier channels in one compact package (vsLM2904VDMR2G)
- Broad industrial supply capability (vsLM2904ADMR2G)
- Single- and split-supply flexibility (vsLM2904VDMR2G)
Ghi chú thiết kế
Place the positive and ground bypass capacitors close to the LM2904DMR2G supply pins, and use the capacitance and ceramic type recommended in the manufacturer datasheet. Keep the exposed trace or pad area free of long thermal and high-current paths where practical. Route the two input channels separately from switching inductors, relay contacts, and motor drive nodes to prevent common-impedance coupling.
Do not assume that an amplifier can reach its negative supply rail. Although the LM2904 common-mode input range extends toward ground or VEE, the valid range depends on supply voltage and output state. Check the input common-mode graph, output swing, and load current before using small sensor signals. In feedback circuits, also confirm that the selected closed-loop gain remains stable with the intended output load and capacitive loading.
Keep feedback components and signal traces compact, and connect the inverting-input return path away from high-impedance bias networks. For sensor inputs, use a guarded or shielded route where cable noise is significant, and place anti-alias filters close to the amplifier. The 1 MHz gain-bandwidth product is sufficient for many low-frequency signals but should not be treated as unrestricted bandwidth at high gain or with capacitive loading.
Estimated: the total dissipated power equals the sum of the two channels' quiescent dissipation and load-related dissipation. With a 24 V supply, two channels at 1 mA each contribute approximately 48 mW before output-current losses; calculate actual values using the datasheet supply-current curves and operating common-mode condition. Verify the resulting junction temperature against the -40°C to 105°C device rating and the PCB's thermal resistance.
Thông tin tuân thủ
The accessible product information identifies the LM2904DMR2G as an onsemi general-purpose operational amplifier in an 8-MSOP package but does not state the requested environmental or material-compliance certifications.
