LM2902NS - Quad 26V 1.2MHz Op Amp | Texas Instruments
MPN： LM2902NS ✓ 啟用中LM2902NS 概覽
An operational amplifier is a high-gain, internally compensated differential-input amplifier used to amplify voltage differences, buffer signals, compare thresholds, and drive feedback networks. The LM2902NS belongs to the operational-amplifier hierarchy, where it is also classified as a general-purpose amplifier, analog amplifier, and linear integrated circuit. Its integrated quad arrangement makes it suitable when four similar amplifier channels are required rather than four separate single or dual packages.
The four internal circuits provide the principal functional advantage of the LM2902NS. A single package can support four independent signal paths, reducing component count and simplifying PCB layout when the same amplifier type is used throughout a subsystem. The 26 V supply rating provides headroom for industrial and automotive-style control environments, while the 1.2 MHz bandwidth supports applications from DC precision amplification to moderate-frequency signal processing.
Texas Instruments identifies the LM2902NS as a standard general-purpose amplifier with four circuits in a 14-SO package. Its 2 mV maximum input offset voltage is relevant when the application compares small sensor voltages against references or develops low-level control signals. Because the four amplifiers are independent, their input and output pins can support separate analog channels rather than requiring a common signal path.
Typical uses include four-channel sensor conditioning, precision threshold comparison, current-loop signal conditioning, industrial process-control interfaces, buffered instrumentation, and general embedded analog signal processing. In each case, the integrated quad topology reduces the number of amplifiers needed while retaining independent channel routing and common package-level supply handling.
PCB design should preserve analog signal integrity by keeping input and output routing short, decoupling the supply pins close to the device, and avoiding current injection beneath the package. Confirm input common-mode range, output swing, supply limits, stability requirements, and channel-specific bandwidth needs against the manufacturer datasheet before finalizing the circuit.
This page combines the Texas Instruments product description, exact-order MPN information, package details, verified source listings, and practical selection guidance. It also distinguishes same-package replacement candidates from broader functional alternatives so engineers can assess footprint compatibility, bandwidth, offset voltage, and supply capability before changing an approved BOM.
直接替換替代品，適用於 LM2902NS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM2902NS （相同外形與佔位） — 差異在於 Amplifier Type, Gain-Bandwidth Product, Mounting Type.
LM2902-N
✅ 直接替換📋 參考替代品（不在目錄中）
LM2902N
✅ 直接替換聯絡詢價
查看資料表 →LM2902B
✅ 直接替換📋 參考替代品（不在目錄中）
LM2902NS 最大額定值與電氣特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Circuits | 4 circuits |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV maximum |
| 封裝 | 14-SO |
| 腳位數 | 14 pins |
| 安裝類型 | Surface mount |
LM2902NS 14-so 腳位配置指南
LM2902NS（14-so 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： LM2902NS.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM2902NS 適用於 6 應用s: Industrial Sensor Conditioning, Precision Threshold Comparison, Process-Control Analog Front End, Current-Loop Signal Conditioning, Buffered Instrumentation, Embedded Analog Control.
Industrial Sensor Conditioning
The LM2902NS is well suited to conditioning several low-level sensor channels because it combines four independent general-purpose amplifiers with a 1.2 MHz gain-bandwidth product and a 2 mV maximum input offset voltage. Each amplifier can implement a non-inverting or inverting gain stage, a buffer, or an active filter within one 14-SO package. The 26 V supply rating provides useful headroom for industrial systems, while the four-channel integration reduces component count compared with separate amplifiers. The primary design checks are the input common-mode range, output swing, noise gain, and stability at the selected gain.
推薦
Precision Threshold Comparison
Four threshold-comparison functions can be implemented with the LM2902NS when a design requires more than one independent comparator-style amplifier. Its 2 mV maximum input offset specification and 1.2 MHz gain-bandwidth product allow the device to respond to small differences between a sensor signal and a reference. The 26 V supply rating accommodates higher-voltage control systems better than low-voltage rail-to-rail amplifier families. Use clean reference routing and adequate output pull-up or load consideration when the amplifier operates open-loop or with positive feedback for hysteresis.
推薦
Process-Control Analog Front End
The LM2902NS can form the analog front end of a process-control subsystem by providing four independent amplifiers for sensor interfaces, error amplifiers, output drive, and auxiliary buffering. Its 26 V maximum supply rating is suitable for industrial control environments, while the 1.2 MHz bandwidth handles feedback loops and signals well beyond pure DC operation. The quad arrangement simplifies inventory and PCB partitioning when several channels use the same compensation strategy. Validate isolation, grounding, input protection, and output loading separately for each channel rather than treating the four circuits as a single signal path.
推薦
Current-Loop Signal Conditioning
A 4-20 mA or voltage-based current-loop interface can use separate LM2902NS amplifier channels for buffering, scaling, active filtering, and threshold detection. The 1.2 MHz gain-bandwidth product provides more bandwidth than a strictly DC application requires, while the 2 mV maximum offset specification is relevant to the accuracy of a low-level measurement stage. The 14-SO quad package reduces the number of packages required for a multi-channel interface. Confirm the loop-transducer limits, input protection requirements, signal bandwidth, and output current before final circuit selection.
推薦
Buffered Instrumentation
The LM2902NS can buffer multiple instrumentation outputs where high input impedance and stable signal transfer are required. Four channels can support sensor outputs, reference nodes, diagnostic inputs, and actuator feedback while sharing a common 26 V-class supply framework. The 1.2 MHz gain-bandwidth product is suitable for moderate-frequency instrumentation signals, and the 2 mV maximum input offset limits baseline error in low-level measurements. Preserve input balance, minimize parasitic capacitance around sensitive pins, and provide suitable load paths for each buffered output.
推薦
Embedded Analog Control
The LM2902NS is appropriate for embedded analog control functions that require four conventional amplifier channels rather than a specialized rail-to-rail device. Possible uses include motor or valve feedback, actuator control loops, analog monitoring, and auxiliary signal conditioning around a digital controller. Its 26 V supply rating and 1.2 MHz bandwidth provide more operating range than many low-voltage precision amplifiers. Design checks should include transient response, output driving capability, common-mode limits, stability with the selected feedback network, and thermal behavior across all four active channels.
推薦
推薦產品摘要
工程參考資料，適用於 LM2902NS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM2902-N | LM2902N | LM2902B | LM2902VN | LM2902N |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | STMicroelectronics |
| Package | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO | 14-SO |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Functional Description | General-purpose operational amplifier | General-purpose operational amplifier | General-purpose operational amplifier | Next-generation LM2902 family | Quad operational amplifier | Quad general-purpose operational amplifier |
| Drop-In Status | Reference device | Identified by TI as a drop-in replacement | Same-family ordering candidate; confirm suffix | TI states LM2902B can replace LM2902 devices | Same-family cross-brand candidate; datasheet check required | Same-family cross-brand candidate; datasheet check required |
主要差異化特點
- Higher listed gain-bandwidth product than the LM2902-N and LM2902N variants (對比LM2902-N)
- Directly documented same-brand replacement path (對比LM2902-N)
- Quad-channel consolidation for independent analog functions (對比LM2902VN)
設計說明
Route each LM2902NS amplifier channel with short input and output traces, especially when the feedback network has high impedance. Keep sensitive input nodes away from supply, output, and digital-switching paths. Because the package contains four independent amplifiers, each channel should have its own local return path and decoupling arrangement rather than relying on a shared long ground route.
Place the supply bypass capacitor close to the device supply pins and provide a low-impedance return to the corresponding ground pins. Keep the total supply voltage at or below the 26 V device rating, including transients. The LM2902NS is a general-purpose amplifier rather than a rail-to-rail part, so input and output operating limits must be checked against the actual supply voltage and signal range.
Do not assume that the four amplifier circuits share an input or output. Each channel has independent input and output pins, and using the wrong channel arrangement can create unintended feedback or signal coupling. Confirm the physical orientation, pin numbering, and exposed connections against the manufacturer pin-description table before fabrication or substitution.
合規資訊
No specific compliance declaration was present in the cited product and listing content. Review the current manufacturer declarations for the exact orderable MPN before releasing production parts.