LM2904FVM-GTR - Dual Ground-Sense Op Amp | ROHM
料号： LM2904FVM-GTR ✓ 量产中LM2904FVM-GTR 概述
An operational amplifier is an analog amplifier IC that uses feedback to amplify the difference between two input voltages. The dual configuration integrates two amplifier channels into one package, reducing board area in designs that need more than one amplification stage. Within the broader semiconductor hierarchy, an operational amplifier belongs to the amplifier IC and linear IC families, where it supports precision control, measurement, buffering, and signal-conditioning functions.
The ground-sense architecture is suited to circuits that monitor or condition signals referenced toward ground. The two independent channels can be used separately or together in applications such as current-sense amplifiers, low-side sensing, sensor interfaces, and general feedback-control blocks. The 3 V to 32 V single-supply range permits operation from compact 3 V systems through substantially higher industrial supply rails, provided the complete circuit remains within the device operating limits.
Low current consumption makes the LM2904FVM useful in designs where the amplifier must coexist with battery-powered, portable, or broadly distributed sensing circuitry. Its MSOP-8 package supports compact surface-mount assembly, while the dual channel count reduces the number of packages needed compared with two single operational amplifiers. Engineers should still verify output-current demand, input common-mode range, output swing, noise, offset, and stability requirements against the manufacturer datasheet for the intended application.
Typical uses include amplifying the voltage across a low-side shunt, conditioning resistive sensor outputs, and providing gain around analog-control loops. The amplifier can also serve as a buffer when its input bias and noise characteristics meet the system requirements. In each circuit, resistor values should establish suitable gain while keeping the operating point within the device input and output ranges.
For PCB implementation, place the device close to the signal source and receiver to minimize susceptibility to noise and parasitic loading. Keep high-current switching paths away from input and feedback nodes, provide a stable decoupling capacitor at the supply pins, and route the feedback loop compactly. Confirm stability with the selected gain and output-load configuration rather than assuming that a generic compensation arrangement fits every application.
This page organizes the LM2904FVM-GTR for engineers evaluating dual ground-sense amplifier requirements, including its 3 V to 32 V supply range, 8-MSOP format, use cases, sourcing considerations, and the engineering checks needed before committing a PCB footprint. Use the manufacturer product page and datasheet for final electrical, environmental, and ordering validation.
直接替换替代料： LM2904FVM-GTR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料LM2904FVM-GTR 最大额定值与电气特性
| Amplifier Type | Dual ground-sense operational amplifier |
| Number of Channels | 2 circuits |
| Single-Supply Operating Voltage Range | 3 V to 32 V |
| Total Supply Voltage Range | ±16 V / 32 V |
| 封装 | 8-MSOP |
| 安装类型 | Surface mount |
| Delivery Form | Tape & Reel (TR) |
| Current Consumption | Low current consumption |
| Input and Output Ground Sense | Supported |
LM2904FVM-GTR 8-msop 引脚配置指南
LM2904FVM-GTR（8-msop 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： LM2904FVM-GTR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM2904FVM-GTR 适用于 6 应用s: Low-Side Shunt Current Sensing, Resistive Sensor Signal Conditioning, Battery-Powered Monitoring, Industrial Control Signal Amplification, Analog Feedback Control, Ground-Referenced Voltage Buffering.
Low-Side Shunt Current Sensing
LM2904FVM-GTR fits low-side current sensing because its ground-sense architecture is intended for signals referenced toward ground and its two channels can amplify a shunt voltage in a compact 8-MSOP package. The amplifier can be placed between the shunt and a controller, ADC, or comparator to raise a small differential measurement above the usable signal range. The 3 V to 32 V single-supply range allows the same device to serve low-voltage and higher-voltage sensing systems. Before layout, confirm that the shunt-induced input voltage remains inside the common-mode range and that the selected feedback resistors keep the output within its permitted swing. Include the shunt tolerance, amplifier offset, and measurement bandwidth in the error budget.
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Resistive Sensor Signal Conditioning
The LM2904FVM-GTR is suitable for conditioning resistive sensor outputs where a divider produces a ground-referenced voltage that requires amplification before digitization. Its dual configuration can process complementary or related sensor channels, while the low current consumption helps limit the burden on a compact sensing system. A 3 V minimum supply supports low-energy operation, and the 32 V upper limit provides room for higher-voltage industrial designs. Choose resistor values that keep the sensor bridge and amplifier input within their valid common-mode range. Account for input offset when resolving small changes, and verify output headroom at the highest sensor value. The manufacturer datasheet should determine whether the selected gain and loading meet the required accuracy and bandwidth.
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Battery-Powered Monitoring
LM2904FVM-GTR fits portable monitoring equipment when low current consumption and a 3 V minimum operating voltage are important. Its two ground-sense channels can support compact measurement blocks that monitor current, temperature-derived analog signals, or other ground-referenced conditions. The 8-MSOP format reduces PCB area, and the single-supply range permits operation from a 3 V system without a negative rail. Because the amplifier can remain connected continuously, verify the quiescent current and the additional supply demand created by the selected feedback network. Power-gate the input or measurement path when the application requires longer standby time, and ensure the input common-mode range remains valid throughout battery discharge and recharge transients.
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Industrial Control Signal Amplification
LM2904FVM-GTR can amplify low-level control signals in industrial equipment requiring a single supply and a ground-referenced input arrangement. Its 3 V to 32 V operating range covers systems where the control rail can vary across the operating envelope, while two channels can support gain stages, comparators, or actuator-driver input conditioning. The MSOP-8 package helps reduce board area in dense control assemblies. Design the feedback network around the required closed-loop gain, then verify output swing, common-mode range, and stability. Maintain separation between analog input routing and switching power stages. For factory equipment, check the operating-temperature limits and environmental qualification in the manufacturer documentation before using the device in safety-related or high-temperature locations.
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Analog Feedback Control
The two channels of LM2904FVM-GTR can be assigned to independent analog feedback functions in control and regulation circuits. The ground-sense capability supports signals whose useful operating point lies near ground, while the broad 3 V to 32 V supply range supports both compact and industrial control rails. One channel may amplify an error or sensing signal, and the other may support an auxiliary signal path. Feedback-loop stability remains dependent on the amplifier gain, load, output impedance, and compensation network, so evaluate the final topology rather than relying on the amplifier family name. Keep feedback traces short, provide local supply decoupling, and verify startup behavior over the complete input and load ranges.
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Ground-Referenced Voltage Buffering
LM2904FVM-GTR can buffer ground-referenced voltages when a source cannot drive the following stage directly. Its dual-channel construction allows two buffers to share one compact package, and its 3 V to 32 V single-supply operation accommodates a wide range of system rails. A unity-gain buffer configuration still requires verification of input offset, bias current, output capability, and stability with the attached load. Place each buffer close to the source or destination it serves, avoid long high-impedance input routes, and maintain a low-impedance ground return. This arrangement is especially useful for sensor nodes and control interfaces where ground noise or loading would otherwise degrade measurement accuracy.
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推荐产品汇总
工程参考数据： LM2904FVM-GTR ——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 |
|---|---|
| Amplifier Type | Dual ground-sense operational amplifier |
| Number of Channels | 2 circuits |
| Single-Supply Operating Voltage Range | 3 V to 32 V |
| Total Supply Voltage Range | ±16 V / 32 V |
| Ground-Sense Operation | Input and output ground sense |
| Current Consumption | Low current consumption |
| Package | 8-MSOP |
| Brand | ROHM Semiconductor |
关键差异点
- Ground-sense dual-amplifier architecture （对比 General-purpose LM2904 family devices)
- Wide single-supply operating range （对比 TI LM2904)
- Low-current dual-channel integration （对比 Two single-channel operational amplifiers)
设计说明
Place the input, output, feedback, and supply connections with short, direct traces. Put the supply-decoupling capacitor immediately beside the power pins and provide a low-impedance ground return. Sensitive input nodes should remain away from switching inductors, power stages, and high-current return paths because capacitive coupling can appear as measurement error even when the amplifier itself operates correctly.
Do not assume that every LM2904-family device is a mechanical substitute. The footprint, exposed-pad arrangement, pin numbering, input assignment, common-mode range, and output-swing limits must match. Compare the manufacturer pin table and electrical characteristics before replacing LM2904FVM-GTR, especially when moving between MSOP, SOIC, and other package styles.
For shunt and sensor measurements, keep the amplifier input route short and preserve a continuous reference ground. Calculate the maximum shunt voltage, offset contribution, and output swing before fixing the gain. Use the manufacturer datasheet to confirm input bias current, offset voltage, noise, bandwidth, and capacitive-load stability under the actual source impedance and feedback network.
The 3 V to 32 V single-supply capability does not imply that every input and output combination is valid at 3 V. Check the common-mode and output-swing requirements across the lowest, nominal, and highest supply conditions. In battery systems, include startup, load-dump, and recharge transients when selecting the supply range and local decoupling.
合规信息
Compliance status must be confirmed from the current ROHM product declaration or material-compliance documentation before production release.
