LM2902S14-13 - Quad General-Purpose Op Amp | Diodes
MPN: LM2902S14-13 ✓ Hoạt độngLM2902S14-13 Tóm tắt
An operational amplifier is a voltage-gain device used to amplify differences between two input signals. The quad operational-amplifier category groups four amplifiers into one device, placing it within the broader hierarchy of analog amplifiers, signal-conditioning ICs, and semiconductor components. The LM2902 family is commonly used where multiple independent amplifier channels are required in one compact circuit footprint.
The LM2902S14-13 is identified as a standard general-purpose amplifier with four circuits in a 14-SO package. It is suitable for applications such as sensor conditioning, active filtering, audio preamplification, loop-control circuits, and general voltage amplification. The 14-SO package is useful where designers want more integration than discrete single amplifiers while retaining a widely used surface-mount format.
Its quad construction can reduce board area by consolidating four amplifier channels into one package. Each channel requires its own external feedback and compensation components determined by the circuit topology. Because the four channels share a package, designers should place input, output, power, and decoupling connections carefully to minimize coupling between high-impedance nodes and noisy output paths.
Typical uses include conditioning sensor outputs in industrial equipment, buffering inputs to analog-to-digital converters, implementing active filters in audio and communications equipment, and closing control loops in power or measurement systems. The amplifier architecture is also appropriate for general-purpose educational and prototype boards requiring multiple independently configured channels.
The primary design consideration is stable feedback. Each amplifier stage should use negative feedback and include compensation appropriate to the required gain and bandwidth. Input common-mode range, supply voltage, output swing, input offset voltage, and slew rate must be checked against the manufacturer datasheet before use, especially when operating near supply rails or driving capacitive loads.
This page organizes the essential LM2902S14-13 package, application, and substitution information into an engineering-focused format. It also provides practical guidance for PCB layout, feedback design, decoupling, and part selection so that designers can assess the quad amplifier for new analog signal-chain designs.
Bộ thay thế dễ dàng lắp đặt cho LM2902S14-13 — 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 LM2902S14-13 (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Amplifier Type, Product Type.
LM2902S
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LM2902D
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902B
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM324BAIDR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM224D
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902S
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902S14-13 Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Standard General Purpose Operational Amplifier |
| Number of Circuits | 4 circuits |
| Hộp | 14-SO |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân LM2902S14-13
| Chân 1 | OUT1 — Amplifier 1 output |
| Chân 2 | IN1- — Amplifier 1 inverting input |
| Chân 3 | IN1+ — Amplifier 1 non-inverting input |
| Chân 4 | V- — Negative supply connection |
| Chân 5 | IN2+ — Amplifier 2 non-inverting input |
| Chân 6 | IN2- — Amplifier 2 inverting input |
| Chân 7 | OUT2 — Amplifier 2 output |
| Chân 8 | OUT3 — Amplifier 3 output |
| Chân 9 | IN3- — Amplifier 3 inverting input |
| Chân 10 | IN3+ — Amplifier 3 non-inverting input |
| Chân 11 | V+ — Positive supply connection |
| Chân 12 | IN4+ — Amplifier 4 non-inverting input |
| Chân 13 | IN4- — Amplifier 4 inverting input |
| Chân 14 | OUT4 — Amplifier 4 output |
Ứng dụng tiêu biểu
LM2902S14-13 phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Active Audio Filtering, Data Acquisition Front End, Power Control and Feedback Loops, Battery-Powered Portable Equipment, Communications Interface Conditioning.
Industrial Sensor Signal Conditioning
The LM2902S14-13 is suitable for conditioning weak sensor signals in industrial measurement systems because it provides four general-purpose amplifier channels in one 14-SO package. A channel can implement a non-inverting gain stage while another buffers the sensor output. Check the input common-mode range and offset requirements in the manufacturer datasheet, especially for high-impedance sources where input bias current can create gain errors. Place the amplifier close to the source and route high-impedance inputs away from switching nodes.
Được đề xuất
Active Audio Filtering
The four channels in the LM2902S14-13 can implement active audio filters, microphone preamplifiers, and output stages for compact consumer or communications equipment. Each amplifier may form a first-order or second-order filter with external resistors and capacitors, while unused channels can be configured for stable biasing or test points. Confirm gain-bandwidth and slew-rate requirements against the manufacturer datasheet because closed-loop gain and output amplitude determine the required bandwidth. Keep feedback components close to their associated pins.
Được đề xuất
Data Acquisition Front End
The LM2902S14-13 can provide input buffering, differential-to-single-ended conversion, and programmable-gain stages ahead of an ADC in a data-acquisition system. Its four channels allow a balanced input to be conditioned without requiring four separate amplifier packages. Verify that the signal common-mode voltage and output swing remain within the limits in the manufacturer datasheet, and account for input offset and bias current when working with high-impedance sensors. Decouple the supply near the package and isolate analog input routing from digital clocks.
Được đề xuất
Power Control and Feedback Loops
The quad LM2902S14-13 can implement error amplifiers, current-feedback loops, and enable-control comparators in industrial power subsystems. Separate channels can monitor input voltage, regulate an output, and provide fault handling without using multiple single-channel packages. The general-purpose architecture is appropriate when feedback-loop bandwidth is modest and the loop does not require a fast slew rate or precision offset. Compare supply range, output swing, and stability requirements with the manufacturer datasheet before assigning each amplifier to a power-control function.
Được đề xuất
Battery-Powered Portable Equipment
The LM2902S14-13 can be used in portable monitoring equipment for four low-frequency conditioning channels, such as temperature, pressure, or motion-sensor interfaces. Consolidating four channels reduces the number of separate amplifier packages, while the 14-SO format supports automated surface-mount assembly. Check quiescent-current and supply-range requirements in the manufacturer datasheet because battery life depends on both the amplifier and external feedback network. Use a stable reference, local bypass capacitors, and short analog traces to maintain measurement repeatability.
Được đề xuất
Communications Interface Conditioning
The LM2902S14-13 can condition slow or moderate-bandwidth communications signals, including receiver buffering, threshold amplification, and transmit-path amplification. Its four channels enable separate buffering for multiple low-speed lines while sharing a single surface-mount footprint. The manufacturer datasheet defines the usable bandwidth, slew rate, input range, and output swing, all of which must support the signal amplitude and edge rate. Use short input routes, a continuous ground reference, and careful feedback placement to reduce susceptibility to crosstalk and unstable behavior.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2902S14-13 — 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 | LM2902S | LM2902 | LM2902B | LM324B | LM224 | LM2902S |
|---|---|---|---|---|---|---|---|
| Package | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO |
| Brand | Diodes Incorporated | Diodes Incorporated | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Amplifier Circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Product Class | Standard General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose |
Bảo phân biệt quan trọng
- Four general-purpose channels consolidated in one package (vsLM2902)
- Direct family sourcing with an orderable 14-SO designation (vsLM2902S)
- Cross-brand options include a documented 36 V family maximum (vsLM2902B)
Ghi chú thiết kế
Route each amplifier's feedback components directly between its input and output pins, and keep the associated ground return short. Place the supply bypass capacitor beside the V+ and V- pins. High-impedance input nodes should remain away from output traces and switching-node copper to reduce capacitive pickup and oscillation risk.
Do not treat the generic LM2902 family name as proof of exact drop-in compatibility. Confirm the 14-SO package, pin assignment, supply limits, input common-mode range, output swing, temperature grade, and stability requirements for the candidate orderable MPN. A footprint match alone does not establish electrical compatibility.
Select the closed-loop gain and external compensation from the manufacturer datasheet's recommended operating region. Add an isolation resistor when driving capacitive loads, and avoid routing an amplifier output directly into another channel's input unless the application intentionally supports that connection. Validate noise, bandwidth, and phase margin with the final load and layout.
Thông tin tuân thủ
The manufacturer datasheet and product listing should be consulted for the authoritative RoHS, lead-free, and halogen-free declarations. The indexed listing requests inventory verification for lead-free and RoHS status, so no compliance conclusion is inferred.