LM2904P3 - Dual 26V 700kHz Op Amp | Texas Instruments
料号： LM2904P3 ✓ 量产中LM2904P3 概述
An operational amplifier is an analog integrated circuit that uses high open-loop gain to amplify the difference between signals applied to its inverting and non-inverting inputs. The LM2904 belongs to the operational-amplifier hierarchy, which includes voltage-feedback amplifiers, general-purpose amplifiers, instrumentation amplifiers, and precision amplifiers. Two amplifiers in one package can reduce board area when a circuit needs matched functions such as buffering, amplification, filtering, or differential sensing.
The verified manufacturer information identifies the LM2904 as a dual, 26 V, 700 kHz operational amplifier. The LM2904P3 orderable is identified as a general-purpose, two-circuit amplifier in an 8-PDIP package. Its dual configuration allows both amplifier sections to share one package while retaining independent inputs and outputs. The 26 V rating permits operation from higher-voltage analog systems than typical low-voltage mixed-signal amplifier families.
The 700 kHz gain-bandwidth figure defines the practical frequency range for many small-signal applications. It is relevant when closing an amplifier around a feedback network, because the amplifier must provide adequate loop gain and phase margin at the intended signal frequency. General-purpose performance makes the device suitable for signal amplification, voltage buffering, active filtering, and feedback-control stages where specialized precision or high-speed parameters are not required.
Typical uses include industrial sensor interfaces, low-frequency active filters, audio preamplifier stages, analog control loops, and general instrumentation. In a dual-amplifier circuit, one section can perform signal conditioning while the other supplies inversion, feedback, or buffering. The package is also appropriate for through-hole industrial designs where DIP mounting remains preferable to fine-pitch surface-mount assembly.
Designers should verify the complete electrical limits, electrical characteristics, pin configuration, common-mode range, output swing, input bias current, slew rate, and stability requirements in the manufacturer datasheet before finalizing a design. Decoupling, input and output signal limits, common-mode voltage, and thermal conditions must be evaluated for the exact operating environment.
This page consolidates the verified 26 V and 700 kHz device facts, distributor pricing information, package data, and same-family replacement guidance. It also adds practical selection criteria and design notes that help engineers distinguish a true 8-pin drop-in option from alternatives requiring a different footprint.
直接替换替代料： LM2904P3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM2904P3 （相同外形与封装尺寸） ——差异在于 Product Type.
LM2904P
✅ 直接替换联系询价
查看数据手册 →LM2904Y
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM2904Z
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM2904P3 最大额定值与电气特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 2 circuits |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| 封装 | 8-PDIP |
| 安装类型 | Through-hole |
| Product Type | Operational amplifier |
| Voltage Feedback Architecture | Operational amplifier |
| Number of Amplifiers per Package | 2 |
LM2904P3 2 引脚配置指南
LM2904P3（2 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LM2904P3.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM2904P3 适用于 6 应用s: Industrial Sensor Signal Conditioning, Active Audio Preamplifier, Active Filters and Feedback Control, Analog Control Loop Amplifier, Test and Measurement Buffer, Legacy Through-Hole Control Boards.
Industrial Sensor Signal Conditioning
The LM2904P3 fits conventional industrial sensor-conditioning stages that need two general-purpose amplifier functions and a relatively high 26 V maximum supply rating. One section can amplify or buffer a sensor signal while the second section provides inversion or active feedback. Its 700 kHz gain-bandwidth product is suitable for many low-frequency control and instrumentation paths, although the exact input offset, bias current, common-mode range, and temperature grade must be checked before deployment. In a practical circuit, keep sensitive input routing away from switching nodes, bypass the supply locally, and verify the sensor output remains inside the amplifier's allowed common-mode range.
推荐
Active Audio Preamplifier
The LM2904P3 can implement the two amplification stages used in a modest active audio preamplifier, such as an input buffer followed by gain or inverting amplification. Its 700 kHz gain-bandwidth product covers audio-band signal processing, while the dual package simplifies board partitioning and reduces the number of amplifier packages. The 26 V maximum supply rating also accommodates higher-voltage analog circuitry when appropriate biasing is used. Designers must still verify output swing, slew rate, input bias current, noise, stability, and the intended gain against the manufacturer datasheet, particularly when driving a low-impedance audio stage.
推荐
Active Filters and Feedback Control
The LM2904P3 is suitable for first-order or moderate-complexity active-filter stages where a 700 kHz gain-bandwidth product provides useful bandwidth for low-frequency shaping. The two amplifier sections can implement an Sallen-Key or state-variable-related building blocks when their feedback and compensation requirements are satisfied. Because the device is general purpose rather than specified here as a precision amplifier, engineers should calculate gain, bandwidth, phase margin, and sensitivity using the complete manufacturer characteristics. Keep the feedback loop compact, observe grounding practices, and confirm output stability with the selected capacitor and load values.
推荐
Analog Control Loop Amplifier
The LM2904P3 can serve as an error amplifier in a conventional analog control loop when its 700 kHz gain-bandwidth product and 26 V maximum supply rating meet the loop requirements. One section may amplify the sensed error signal while the other buffers a reference or provides additional gain. The package's dual layout can reduce component count in control boards that use through-hole assembly. Actual loop stability depends on the plant, compensation network, load, and output-swing limits, all of which must be verified from the manufacturer datasheet and the complete system response rather than inferred from gain-bandwidth alone.
推荐
Test and Measurement Buffer
The dual LM2904P3 package can provide buffering and gain functions in a general-purpose test or measurement instrument. Its 700 kHz gain-bandwidth product is appropriate for many low-frequency measurement chains, while the two-circuit arrangement allows a measured signal to be buffered and amplified without requiring two separate packages. The 26 V maximum supply rating supports higher-voltage instrumentation when the common-mode and output-swing limits permit it. Before choosing the device, verify input bias current and offset because they directly affect high-impedance sources, and evaluate capacitive loading and noise with the complete source and measurement network.
推荐
Legacy Through-Hole Control Boards
The LM2904P3 is appropriate for legacy through-hole control boards that require two general-purpose amplifier channels and benefit from a stable DIP footprint for manual assembly or maintenance. Its 26 V maximum supply rating suits many legacy analog rails, and its 700 kHz gain-bandwidth product provides adequate margin for slow control and interlock loops. The 8-PDIP format simplifies through-hole prototyping and reduces the need for fine-pitch assembly equipment. Engineers should nevertheless verify obsolete-system supply tolerances, temperature requirements, noise sensitivity, and any previously selected substitute's electrical characteristics rather than treating package compatibility as proof of complete equivalence.
推荐
推荐产品汇总
工程参考数据： LM2904P3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LM2904P | LM2904Y | LM2904Z |
|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Amplifiers | 2 circuits | 2 circuits | 2 circuits | 2 circuits |
| Maximum Supply Voltage | 26 V | 26 V | 26 V | 26 V |
| Gain-Bandwidth Product | 700 kHz | 700 kHz | 700 kHz | 700 kHz |
| Product Type | General-purpose operational amplifier | General-purpose operational amplifier | General-purpose operational amplifier | General-purpose operational amplifier |
关键差异点
- Matches the verified LM2904 family headline electrical ratings （对比 LM2904P)
- Provides two general-purpose amplifiers in one 8-PDIP package （对比 LM2904Y)
- Maintains a legacy-compatible 8-PDIP footprint （对比 LM2904Z)
设计说明
Design the supply rail with the verified 26 V maximum supply rating in mind, but do not treat that value as a recommended operating point. Confirm the complete allowable supply range, input common-mode range, output swing, and quiescent current from the manufacturer datasheet. Place the supply-bypass capacitor close to the device pins, minimize loop area, and check that power-supply ripple and startup behavior do not move either amplifier outside its valid operating region.
Keep the two amplifier inputs, feedback components, and output routing physically short and separate where practical. For an 8-PDIP device, preserve adequate spacing around adjacent through-hole pins and inspect the package drawing for exposed-metal or lead-form details. Route high-impedance input traces away from supply buses, switching nodes, and relay contacts. A compact ground return from each bypass capacitor reduces parasitic inductance and helps prevent feedback from supply or ground impedance.
Do not assume that the 700 kHz gain-bandwidth product is the usable closed-loop bandwidth at every voltage gain. Higher noise gain reduces bandwidth, while slew rate, load capacitance, output-current capability, and stability conditions can impose earlier limits. Check the manufacturer datasheet for the complete electrical characteristics and verify the intended feedback network. Also avoid using a DIP-package match alone as proof of equivalence for a different LM2904 suffix.
合规信息
The supplied verified search results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer name or package suffix.
