LM2902DR2 - Quad Single-Supply Op Amp | onsemi | SOIC-14
MPN: LM2902DR2 ✓ Hoạt độngLM2902DR2 Tóm tắt
An operational amplifier is a high-gain, frequency-compensated analog building block used to amplify differential signals, buffer inputs, compare voltages, and drive feedback-control networks. The LM2902 belongs to the broader hierarchy of operational amplifier, analog amplifier IC, signal-conditioning IC, and power-management semiconductor. Its differential-input architecture requires the two input voltages to be considered together, while its common-mode input range can extend to ground for many single-supply applications.
The principal benefits of the LM2902DR2 are its four integrated channels, 36 V supply capability, low input offset voltage, and high gain-bandwidth product. Four independent amplifiers in one 14-pin package simplify designs that require several matched circuit functions, such as sensor conditioning, active filtering, or control-loop sections. The low offset voltage helps reduce output error when the amplifier is used with negative feedback, although the actual error also depends on input bias current, resistor matching, temperature, and common-mode operating conditions.
The LM2902DR2 is part of the established LM324-family class of low-cost, single-supply quad operational amplifiers with true differential inputs. Because the device is frequency compensated, designers can create stable closed-loop gain stages without adding external compensation capacitors in typical applications. Its 14-pin SOIC footprint supports conventional surface-mount assembly and is also convenient for prototypes, hobbyist boards, education kits, and repair platforms that use the standard quad-op-amp outline.
Typical uses include industrial sensor interfaces, low-frequency audio amplification, active filters, comparator-style signal conditioning, and general instrumentation. The quad organization is particularly useful when a circuit needs two or more gain stages, an amplifier-based filter, or multiple independent analog channels. For power-sensitive systems, the 36 V operating class also allows the device to sit behind higher-voltage supplies when the application and protection requirements permit it.
When designing a board around the LM2902DR2, check supply voltage, common-mode range, output swing, input bias current, and the required closed-loop gain at the operating frequency. Place input and feedback components close to the relevant amplifier pins, and keep sensitive input nodes away from switching-current paths. Decouple each supply rail near the device, and confirm that every connected output remains within its valid output-voltage range under worst-case load and temperature conditions.
This product page combines the LM2902DR2 technical description, package details, sourcing workflow, application guidance, and verified drop-in alternatives. It also organizes parameter comparisons and practical PCB considerations so engineers can evaluate the device, its replacements, and its role in a complete analog signal chain before releasing a design.
Bộ thay thế dễ dàng lắp đặt cho LM2902DR2 — 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 LM2902DR2 (cùng hình factor và footprint) — khác nhau ở Package, Amplifier Type, Input Type, Maximum Supply Voltage, Number of Channels.
LM2902DR2G
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902NSRG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902KVQDRG4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902QDRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DR2 Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Quad general-purpose operational amplifier |
| Number of Channels | 4 channels |
| Supply Configuration | Single-supply or split-supply operation |
| Maximum Supply Voltage | 36 V |
| Input Type | True differential input |
| Common-Mode Input Range | Extends to ground |
| Hộp | 14-pin SOIC |
| Kiểu lắp đặt | Surface mount |
| Frequency Compensation | Internally compensated |
Hướng dẫn cấu hình chân LM2902DR2 14-pin soic
Cấu hình chân cho LM2902DR2 (14-pin soic 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 LM2902DR2.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2902DR2 phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Active Audio Filters, Instrumentation and Measurement, Power-Supply Control and Monitoring, Educational and Prototyping Platforms, Motor Control and Feedback Loops.
Industrial Sensor Signal Conditioning
The LM2902DR2 is well suited to conditioning four sensor channels with differential inputs, buffered outputs, and frequency-compensated closed-loop gain stages. Its 36 V supply class provides additional headroom for industrial systems, while the common-mode input range extending to ground is useful when sensing signals near zero volts. The four-amplifier package can reduce the number of analog ICs required on a board. For each channel, verify the input bias current against the sensor source impedance and confirm that the expected signal and output levels remain inside the datasheet limits. Add input protection when sensors are connected to long cables or exposed to industrial transients.
Được đề xuất
Active Audio Filters
The four independent LM2902DR2 amplifiers can implement active low-pass, high-pass, notch, or multi-stage audio filters without requiring four separate packages. True differential inputs support balanced or differential source arrangements, and the high gain-bandwidth product provides useful bandwidth for low-frequency audio and control applications. Each amplifier can implement a conventional feedback network with stable closed-loop operation. Check the exact gain-bandwidth and output-swing limits against the target frequency and load. Place feedback components close to the relevant pins, and keep the ground return short so filter signals do not share noisy paths with digital or switching circuitry.
Được đề xuất
Instrumentation and Measurement
LM2902DR2 is applicable to instrumentation blocks that need several differential gain stages, input buffers, and threshold functions in one 14-pin SOIC. The device provides four amplifiers, true differential inputs, low input offset voltage, and a common-mode input range extending to ground, all of which are useful when handling slowly varying measurement signals. Designers can allocate independent channels to sensing, filtering, reference buffering, and output driving. Before release, verify offset voltage, input bias current, common-mode range, and output-current capability over the required temperature range. Use guarding or shielding for high-impedance sources because board leakage can otherwise create errors comparable to the signal.
Được đề xuất
Power-Supply Control and Monitoring
The LM2902DR2 can implement error amplifiers, comparators, current-loop elements, and threshold detectors in linear power-supply control circuits. Its 36 V family rating permits operation from supply rails higher than many low-voltage op amps, while the common-mode input capability that extends to ground supports monitoring near the negative rail. A quad device can combine control, sensing, and auxiliary functions in one package. Verify the output-swing limits and load drive at the minimum supply voltage, and ensure loop compensation remains stable under the selected crossover frequency. Place the device away from power-switch nodes and use Kelvin routing when sensing a high-current ground reference.
Được đề xuất
Educational and Prototyping Platforms
The LM2902DR2 is an accessible choice for electronics education, breadboard and solderless-breadboard prototypes, university laboratories, and maker platforms because it combines four general-purpose amplifiers in one 14-pin SOIC. Students can assign separate channels to non-inverting, inverting, summing, comparator, and active-filter experiments without managing four separate packages. Its single-supply architecture simplifies common 5 V laboratory demonstrations, while split-supply operation can be used where the circuit requires it. Prototype with the manufacturer's pin configuration visible, connect unused amplifier inputs to a defined potential, and avoid exceeding the common-mode or output-swing boundaries when experimenting with different feedback values.
Được đề xuất
Motor Control and Feedback Loops
The LM2902DR2 can serve in low-frequency motor-control and feedback circuits where multiple independent amplifier channels are useful for command conditioning, current feedback, error comparison, and output buffering. The 36 V supply class can accommodate higher-voltage control environments when the output-stage limits are respected, and the true differential inputs simplify feedback-sensor connections. Stable use depends on the feedback network, loop compensation, and output loading, so evaluate the complete control loop rather than assuming a general-purpose amplifier is automatically suitable for a motor driver. Keep the amplifier away from switching-node currents, provide local decoupling, and use a quiet reference return for current-sense measurements.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2902DR2 — 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 | LM2902DR2G | LM2902DG | LM2902DR | LM2902NSRG4 | LM2902KVQDRG4 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same | 14-pin SOIC - same |
| Number of Amplifiers | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Supply Class | Up to 36 V | Up to 36 V | Up to 36 V | Up to 36 V | Up to 36 V | Up to 36 V |
| Input Configuration | True differential input | True differential input | True differential input | True differential input | True differential input | True differential input |
Bảo phân biệt quan trọng
- Four independent amplifiers in one standard 14-pin SOIC (vsLM2904P3)
- Broad 36 V supply class for general-purpose analog designs (vsTLV2402ID)
- Single-supply operation with common-mode input capability extending to ground (vsMCP6001-I/SN)
Ghi chú thiết kế
The LM2902 family supports supply voltages up to 36 V, but the external circuit still requires correct protection against supply transients and reverse voltage. Place a local bypass capacitor at the supply pins and route the return directly to the device ground. If the circuit operates from a higher-voltage source, include series resistance or another defined current-limiting method so a fault cannot expose the amplifier to an excessive supply voltage.
Keep each amplifier's input, feedback, and compensation-related components close to the corresponding SOIC pins. Route sensitive differential inputs away from switching nodes, power inductors, and high-current return paths. Use a continuous ground reference beneath the device where practical, and pair differential traces closely while avoiding crossings with unrelated analog channels. Long feedback loops increase susceptibility to oscillation and can make a nominally stable design behave differently after PCB assembly.
Do not allow input or output voltages to exceed the selected amplifier's common-mode or output-swing limits. Unused amplifier inputs should be tied to a defined potential rather than left floating, because an open input can amplify noise and unpredictably influence nearby channels. When replacing LM2902DR2, verify pin numbering, supply range, offset voltage, bandwidth, output-current capability, temperature grade, and qualification; a matching package alone does not prove equivalent operation.
Thông tin tuân thủ
The component listing identifies onsemi as the manufacturer but does not state the LM2902DR2 compliance declarations. Confirm RoHS, REACH, automotive qualification, lead-free, halogen-free, and conflict-minerals status against the current manufacturer documentation before release.