LM2902VDR2G - 32V Quad Op Amp | onsemi | Industrial Control
MPN: LM2902VDR2G ✓ Hoạt độngLM2902VDR2G Tóm tắt
An operational amplifier is an active semiconductor device that uses high-gain differential feedback to amplify the difference between two input voltages. Within the broader hierarchy, the LM2902VDR2G is a quad operational amplifier, which combines four voltage-feedback amplifier channels in one integrated circuit. This integration reduces board area and component count when a design requires multiple analog signal paths.
The principal features include four amplifier channels, single-supply operation from 3 V to 32 V, a typical slew rate of 0.6 V/us, true differential inputs, and an extended-temperature version intended for reliable operation beyond the normal commercial temperature range. The device is suited to sensors, transducers, low-level signal conditioning, feedback networks, analog control loops, and general-purpose analog signal processing.
Its architecture allows each amplifier to be configured as an inverting amplifier, non-inverting amplifier, voltage follower, comparator, or differential stage when the required stability and common-mode conditions are respected. Because all four channels share one package, decoupling requirements apply primarily to the common power pins. This makes the LM2902VDR2G useful where four related analog channels must operate within one temperature and supply environment.
Typical applications include industrial sensor interfaces, current-loop receivers, data-acquisition modules, transducer amplifiers, audio preamplifier stages, low-power control systems, and embedded instrumentation. The 14-SOIC outline also simplifies assembly and replacement in designs that historically used the LM2902 family. Verify each channel's input and output swing before driving large signals near the supply rails.
The primary design consideration is ensuring that signal levels, source impedances, feedback values, and load impedances remain within the operating limits of the device. Place the power-bypass capacitor close to the supply pins, maintain a common ground reference between amplifier inputs and feedback networks, and avoid excessive source resistance where it would degrade input bias-current error or noise performance.
This page organizes the LM2902VDR2G specifications, verified manufacturer and distributor references, pin assignment, same-footprint alternatives, comparison parameters, and practical engineering guidance. It also identifies where temperature grade, channel performance, qualification, and package details require confirmation against the manufacturer datasheet before a substitution is approved.
Bộ thay thế dễ dàng lắp đặt cho LM2902VDR2G — 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 LM2902VDR2G (cùng hình factor và footprint) — khác nhau ở Maximum Supply Voltage, Package.
LM2902DR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DRE4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →NCV2902DR2G
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902DRG3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902VDR2G Tỷ lệ tối đa & tính chất điện
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 4 channels |
| Supply Voltage Range | 3.0 V to 32 V |
| Maximum Supply Voltage | 32 V |
| Slew Rate | 0.6 V/us typical |
| Input Type | Differential input |
| Supply Type | Single supply |
| Hộp | 14-SOIC |
| Số chân | 14 pins |
| Kiểu lắp đặt | Surface mount |
Cấu hình chân LM2902VDR2G
| Chân 1 | OUT1 — Channel 1 output |
| Chân 2 | IN1- — Channel 1 inverting input |
| Chân 3 | IN1+ — Channel 1 non-inverting input |
| Chân 4 | V+ — Positive supply input |
| Chân 5 | IN2+ — Channel 2 non-inverting input |
| Chân 6 | IN2- — Channel 2 inverting input |
| Chân 7 | OUT2 — Channel 2 output |
| Chân 8 | OUT3 — Channel 3 output |
| Chân 9 | IN3- — Channel 3 inverting input |
| Chân 10 | IN3+ — Channel 3 non-inverting input |
| Chân 11 | V- — Negative supply input; connect to ground for single-supply operation |
| Chân 12 | IN4+ — Channel 4 non-inverting input |
| Chân 13 | IN4- — Channel 4 inverting input |
| Chân 14 | OUT4 — Channel 4 output |
Ứng dụng tiêu biểu
LM2902VDR2G phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Data Acquisition and Instrumentation, Current-Loop Receiver, Audio Preamplifier and Control, Power Supply Feedback and Monitoring, Embedded Control and Analog Interface.
Industrial Sensor Signal Conditioning
The LM2902VDR2G fits industrial sensor interfaces that require multiple low-level analog channels on a shared supply. Its four differential-input amplifiers can condition resistive, voltage, and current-sensor outputs, while the 3 V to 32 V single-supply range supports both compact low-voltage equipment and higher-voltage industrial circuits. The typical 0.6 V/us slew rate is suitable for moderate-frequency process signals rather than demanding high-speed waveform systems. Design each channel with feedback values that keep output swing within the amplifier's limits, and reference every input and feedback point to a low-noise common ground.
Được đề xuất
Data Acquisition and Instrumentation
LM2902VDR2G is useful in multichannel data-acquisition modules where four analog inputs must be amplified without using four separate packages. Each channel can implement a non-inverting, inverting, or differential gain stage around a common 3 V to 32 V supply. The integrated quad configuration simplifies synchronization and reduces routing overhead, although each amplifier still requires its own feedback network and output isolation where necessary. Check common-mode input range, offset voltage, input bias current, and output capability against the instrumentation's excitation and sensor-ground tolerances.
Được đề xuất
Current-Loop Receiver
The LM2902VDR2G can implement current-loop receivers in industrial transmitter and controller designs because four channels provide spare amplifier capacity for signal conditioning or active filtering. A 3 V minimum supply permits low-power receiver electronics, while the 32 V maximum supports higher-voltage field equipment. Input protection and filtering must be placed ahead of the amplifier if the sensor wiring is exposed to transients. Confirm the common-mode input range at the selected receiver current and ensure the input and feedback components maintain adequate stability and bias-current balance.
Được đề xuất
Audio Preamplifier and Control
LM2902VDR2G can serve as a general-purpose preamplifier in audio-control and small-signal analog modules. Its four channels allow separate paths for microphone input, headphone or speaker feedback, tone control, and auxiliary monitoring. The 0.6 V/us typical slew rate is adequate for audio-band signals, and the single-supply architecture simplifies portable or embedded control systems. Use appropriate input coupling, gain-setting resistors, and output coupling capacitors, and verify that the selected channel can drive the intended load without entering distortion at the required peak amplitude.
Được đề xuất
Power Supply Feedback and Monitoring
The LM2902VDR2G can monitor, amplify, and compare low-level power-supply signals in industrial and embedded systems. Its 32 V maximum supply rating permits operation from higher-voltage rails, although the amplifier output range still constrains how close the measured signal may approach the supply rails. The four channels can support redundant monitoring, sequencing feedback, or filtered threshold detection. Keep high-current switching nodes physically separated from the input nodes, add filtering ahead of the amplifier, and account for offset and temperature drift when setting detection thresholds.
Được đề xuất
Embedded Control and Analog Interface
LM2902VDR2G is appropriate for embedded controllers requiring several high-gain analog channels for actuator feedback, analog setpoints, or sensor conditioning. A single package simplifies routing between a microcontroller interface and the analog section, while operation down to 3 V supports compact control boards. The quad amplifier does not replace a dedicated precision or high-speed amplifier, so channels with tight offset, bandwidth, or output-drive requirements may need different devices. Confirm the ADC input range and use the amplifier's output-current capability as part of the system-level design.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2902VDR2G — 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 | LM2902DR | LM2902DG | LM2902DRE4 | NCV2902DR2G | LM2902DRG3 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | Texas Instruments |
| Package | 14-SOIC | 14-SOIC - same footprint | 14-SOIC - same footprint | 14-SOIC - same footprint | 14-SOIC - same footprint | 14-SOIC - same footprint |
| Amplifier Configuration | Quad, 4 channels | Quad, 4 channels | Quad, 4 channels | Quad, 4 channels | Quad, 4 channels | Quad, 4 channels |
| Supply Voltage Range | 3 V to 32 V | 3 V to 32 V | 3 V to 32 V | 3 V to 32 V | 3 V to 32 V | 3 V to 36 V |
| Maximum Supply Voltage | 32 V | 32 V | 32 V | 32 V | 32 V | 36 V |
Bảo phân biệt quan trọng
- Four amplifiers in one package (vsLM2904DRG3)
- Extended-temperature-oriented onsemi ordering option (vsLM2902DR)
- Higher documented maximum supply rating (vsLM2902DRG3)
- Single-supply operation from 3 V (vsLM2902DR)
Ghi chú thiết kế
Place the supply-bypass capacitor close to pins 4 and 11, with a short return path to the ground reference. Because the LM2902VDR2G contains four amplifiers in one package, shared supply impedance can appear on every channel. Keep analog input and feedback routing away from switching-node copper, use a continuous ground plane where practical, and route each output away from adjacent input nets to minimize crosstalk.
Do not assume that a 32 V maximum supply rating permits 32 V input signals at every amplifier pin. Check the channel's common-mode input range, output swing, and supply limits from the manufacturer electrical-characteristics table. For single-supply operation, connect pin 11 to the system ground and bias non-inverting inputs appropriately; leaving that node disconnected or applying a negative signal without a suitable negative supply can prevent normal operation.
Choose feedback resistors and source impedances that keep the selected channel stable and reduce bias-current-induced errors. Place compensation, filter, or gain-setting components close to the relevant input and feedback pins. When driving an ADC, include an appropriate isolation or filtering network and verify that the amplifier's output-current capability, slew rate, and capacitive-load behavior meet the sampling requirements.
Estimated: with a 32 V maximum supply, a 5 V output, and a 1 A output load, the theoretical linear-regulator dissipation would be (32 V - 5 V) x 1 A = 27 W, although the LM2902VDR2G is an amplifier rather than a regulator and its actual output-current and dissipation limits must govern the design. Use the manufacturer SOA-free operating limits and thermal calculations for the specific output load, and avoid sustained operation near the maximum supply with large output swings.
Thông tin tuân thủ
No exact RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration for the LM2902VDR2G ordering code was included in the verified product records. Confirm these attributes from the manufacturer product declaration before regulated procurement.
