LM2904AQM8-13 - Dual 36V Op Amp, 500uA | Diodes
料号： LM2904AQM8-13 ✓ 量产中LM2904AQM8-13 概述
An operational amplifier, or op amp, is a high-gain analog amplifier used to amplify voltage differences, buffer sensors, drive external loads, and implement active filters. The LM2904 belongs to the broader general-purpose amplifier hierarchy, which includes dual and quad operational amplifiers used in signal-chain, instrumentation, and control applications. Its wide supply range makes it useful where signal levels and supply conditions vary substantially.
The headline characteristics make the LM2904AQM8-13 appropriate for low-power signal conditioning. A 36 V maximum supply expands the usable operating envelope, while 500 uA supply current limits the power burden of dual-channel circuits. The 20 nA input bias current reduces loading on high-impedance sources, and 100 dB open-loop gain provides useful amplification when feedback establishes the closed-loop gain.
The LM2904Q family uses industry-standard pin arrangements and is available in multiple small-outline packages. The M8-13 ordering option places this dual amplifier in an 8-MSOP. For conventional non-unity-gain operation, feedback networks define the closed-loop response, while input common-mode and output-swing limits must remain within the datasheet operating envelope. Decoupling should be placed close to the supply pins to reduce supply-borne noise.
Typical uses include low-side current monitoring, transducer and sensor interfaces, buffered analog measurements, active filtering, and general-purpose signal conditioning in automotive or industrial equipment. The dual configuration reduces board area when two independent analog channels are required, although crossover distortion is important when similar signals are amplified simultaneously at high output levels.
Designers should verify input bias current, input offset voltage, output swing, common-mode range, and stability requirements against the complete operating conditions. Avoid relying on rail-to-rail operation unless the applicable LM2904 datasheet explicitly confirms the required input or output range. Decoupling capacitors, grounding, and feedback-component placement remain important even though the amplifier itself has a low supply current of 500 uA.
This product page consolidates the verified order information, package details, technical attributes, application guidance, and qualified drop-in comparison points. It is designed to help engineers determine whether the LM2904AQM8-13 fits a compact, dual-channel automotive signal-conditioning design and to identify the closest pin-compatible alternatives before a board-level substitution.
直接替换替代料： LM2904AQM8-13 ——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： LM2904AQM8-13 （相同外形与封装尺寸） ——差异在于 Package.
LM2904QM8-13
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →LM2904AM8-13
✅ 直接替换联系询价
查看数据手册 →LM2904AQM8-13 最大额定值与电气特性
| Product Type | Dual operational amplifier |
| Number of Amplifier Channels | 2 channels |
| Maximum Supply Voltage | 36 V |
| 电源电流 | 500 uA |
| Input Bias Current | 20 nA |
| Open-Loop Gain | 100 dB |
| 封装 | 8-MSOP |
| 安装类型 | Surface mount |
| Automotive Qualification | Automotive compliant |
| Mold Compound | Green mold compound |
| Pin Arrangement | Industry-standard pinout |
LM2904AQM8-13 8-msop 引脚配置指南
LM2904AQM8-13（8-msop 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LM2904AQM8-13.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM2904AQM8-13 适用于 6 应用s: Automotive Sensor Signal Conditioning, Current-Sensing Amplifier Front End, Industrial Transducer Interface, Active Audio and Low-Frequency Filter, Battery-Powered Instrumentation, Process-Control Signal Interface.
Automotive Sensor Signal Conditioning
The LM2904AQM8-13 fits automotive sensor-conditioning circuits that require two amplifier channels, a supply rating up to 36 V, and low input loading. Its specified input bias current of 20 nA helps preserve weak sensor signals, while 100 dB open-loop gain supports closed-loop conditioning stages around an appropriate reference. The automotive-compliant ordering family and 8-MSOP package also support compact PCB placement. Verify the complete input common-mode range, output swing, temperature grade, and transient requirements for the vehicle environment before releasing the design.
推荐
Current-Sensing Amplifier Front End
The LM2904AQM8-13 can provide the differential amplification stage around a low-side current-sense element in industrial or automotive equipment. A 20 nA input bias current minimizes disturbance to high-impedance sensing nodes, and the dual 8-MSOP configuration can support a second stage for filtering or offset correction. Its 36 V maximum supply provides useful headroom in 24 V systems, although the chosen rail and input nodes must remain within the operating limits. Validate common-mode range, output swing, offset behavior, and stability at the highest expected current.
推荐
Industrial Transducer Interface
The LM2904AQM8-13 is appropriate for buffering and amplifying outputs from resistive, capacitive, or low-current industrial transducers. The 20 nA input bias current is favorable when the source impedance is high, and the 100 dB open-loop gain allows useful gain when precision feedback resistors define the closed-loop response. The dual amplifier can handle two related measurements without requiring two packages. Check the sensor excitation range, input common-mode limits, output loading, offset voltage, and frequency response in the final analog chain.
推荐
Active Audio and Low-Frequency Filter
The LM2904AQM8-13 can implement active low-pass, high-pass, or notch-filter sections where a general-purpose dual op amp is appropriate. Its 100 dB open-loop gain supports accurate closed-loop gain, while the two channels in an 8-MSOP provide a compact implementation for stereo or dual-channel filtering. The 500 uA supply current favors low-power analog blocks, but filter bandwidth still depends on gain-bandwidth and slew-rate limits. Confirm those parameters, output swing, noise performance, and component tolerances before using the device in precision audio paths.
推荐
Battery-Powered Instrumentation
The LM2904AQM8-13 suits low-power instrumentation that requires two analog channels and a relatively low 500 uA supply current. A 36 V maximum supply rating also allows operation from protected higher-voltage systems when the actual rail and signal limits are suitable. The device can buffer sensors, amplify differential measurements, and drive moderate loads within its output-swing capability. Battery designs should evaluate total system quiescent current, startup behavior, leakage, temperature-dependent limits, and regulator headroom rather than considering supply current alone.
推荐
Process-Control Signal Interface
The LM2904AQM8-13 can form part of an analog process-control interface by conditioning sensor signals and buffering control outputs. Its dual-channel 8-MSOP package supports two related signal paths in limited board space, while 20 nA input bias current reduces loading on high-impedance transducers. The 36 V maximum supply is relevant to industrial systems with protected rails, but engineers must confirm the allowable common-mode and output ranges for each node. Input protection, grounding, stable feedback design, and separation from switching circuitry remain important system-level requirements.
推荐
推荐产品汇总
工程参考数据： LM2904AQM8-13 ——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 | LM2904QM8-13 | LM2904AM8-13 |
|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Product Type | Dual operational amplifier | Dual operational amplifier | Dual operational amplifier |
| Number of Channels | 2 channels | 2 channels | 2 channels |
| Maximum Supply Voltage | 36 V | 36 V | 36 V |
关键差异点
- Combines two amplifier channels with a 20 nA input bias current （对比 LM2904QM8-13)
- Automotive-compliant Q family ordering （对比 LM2904AM8-13)
- Uses a compact 8-MSOP while retaining the 36 V supply rating （对比 LM2902DR)
设计说明
Place the supply-decoupling capacitor as close as practical to the device supply and ground pins, with a short return path that avoids current from output-driving stages. Keep both amplifier channels over a common ground plane when the circuit measures small differential signals. Feedback resistors should also connect directly to the corresponding op-amp pins so that PCB resistance does not create additional gain error or instability.
The 36 V value is a maximum supply rating rather than a recommended operating rail. Select an operating voltage that provides the required output swing and common-mode headroom at the expected temperature. Although the listed supply current is 500 uA, the complete circuit can consume more current through external feedback networks, load currents, and neighboring components. Check regulator tolerance, startup transients, and maximum voltage during fault conditions.
Do not assume rail-to-rail input or output behavior without checking the corresponding LM2904Q electrical-characteristics table. Confirm that both input nodes remain inside the common-mode range and that the required output level stays within the output-swing limits at the actual load. For low-frequency precision circuits, also examine input offset voltage and bias-current effects rather than using open-loop gain alone as the accuracy metric.
Keep sensitive amplifier inputs away from switching nodes, inductors, high-current traces, and long exposed copper areas. When the device buffers a high-impedance source, minimize leakage from board contamination and guard the input node if the source impedance makes leakage significant. Use a quiet ground reference and route output returns separately where practical so output-current transients do not create input-referred voltage errors.
合规信息
The manufacturer describes the LM2904Q family as automotive compliant and states that green mold compound is standard. A separate AEC-Q100 qualification statement and RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not present in the verified product information.
