LM2904FVJ-E2 - Dual 3-32V Ground-Sense Op Amp | ROHM
Артикул: LM2904FVJ-E2 ✗ Снят с производстваLM2904FVJ-E2 Обзор
A ground-sense operational amplifier is a voltage-feedback amplifier intended to amplify or buffer signals near 0 V without requiring a dual supply. The LM2904FVJ belongs to the broader operational-amplifier hierarchy: voltage-feedback amplifier, analog signal-conditioning IC, and semiconductor. Its rail-to-rail input-and-output ground-sense capability is especially useful in battery-powered monitoring, industrial sensing, and portable equipment where the signal may approach the lower supply limit.
The device provides two amplifier channels in one package, reducing board area compared with two separate single amplifiers. Its wide 3 V to 32 V operating range accommodates low-voltage systems as well as higher-voltage industrial supplies. The manufacturer describes low current consumption and ground-sense operation as principal characteristics. Because both channels share one package, designers must also evaluate common supply impedance, thermal behavior, output-current sharing between independent loads, and the maximum load conditions of each amplifier.
The LM2904FVJ-E2 is categorized as a standard general-purpose amplifier, but its ground-sense architecture is important in applications where the measured voltage can approach 0 V. Unlike a conventional rail-to-rail amplifier selected only by input common-mode limits, this device specifically addresses ground-referenced input and output operation. The TSSOP-BJ package offers a compact surface-mount format, although careful pin placement and decoupling remain necessary to minimize noise and ground-offset errors.
Typical uses include low-side current detection, battery monitoring, portable instrumentation, industrial transducers, sensor interfaces, and low-voltage control systems. In a current-sense application, the amplifier can sit on the low side of a shunt, preserving a ground-centered measurement signal while reducing the voltage burden imposed on the measured circuit. In sensor systems, the close-to-ground input capability reduces the need for an additional offsetting supply.
Design around the manufacturer pinout and place input, output, and decoupling connections to minimize parasitic resistance in the feedback network. Maintain short ground-return paths and decouple the supply close to the device. Because the manufacturer classifies this product as not recommended for new designs, new production projects should normally use a currently recommended amplifier unless the legacy footprint, supply range, ground-sense behavior, and electrical performance are mandatory.
This page combines the exact manufacturer lifecycle position, package and supply information, drop-in alternatives, application guidance, and design cautions for engineers maintaining or replicating an existing LM2904FVJ-E2-based design. It emphasizes practical selection limits rather than treating the legacy part as a universal modern replacement.
Аналоги без доработки для LM2904FVJ-E2 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с LM2904FVJ-E2 (тот же форм-фактор и посадочное место) — отличается по Package, Slew Rate, Input Offset Voltage, Number of Channels, RoHS Status.
LM2904PW
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →LM2904BIDR
✅ Прямая заменаУточнить цену
Открыть даташит →LM2904LV
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
LM2904DR
✅ Прямая заменаУточнить цену
Открыть даташит →LM358DT
✅ Прямая замена✗ Нет в наличии
$0.0509 / шт.
Открыть даташит →LM2904FVJ-E2 Максимальные параметры и электрические характеристики
| Amplifier Type | Dual ground-sense operational amplifier |
| Number of Amplifier Channels | 2 circuits |
| Operating Supply Voltage, Single Supply | 3 V to 32 V |
| Dual-Supply Operating Range | +/-16 V or 32 V total |
| Input Common-Mode Range | Includes ground |
| Output Common-Mode Range | Includes ground |
| Quiescent Current Consumption | Low; exact value not stated |
| Корпус | 8-pin TSSOP-BJ |
| Тип монтажа | Surface mount |
| Manufacturer Shipping Format | Tape and reel |
| Product Category | Standard general-purpose amplifier |
| Lifecycle Recommendation | Not recommended for new designs |
| Design Diversion | Not recommended for design diversion |
| Статус RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Конфигурация выводов LM2904FVJ-E2
| Контакт 1 | OUT A — Output of amplifier A |
| Контакт 2 | IN A- — Inverting input of amplifier A |
| Контакт 3 | IN A+ — Non-inverting input of amplifier A |
| Контакт 4 | V- — Negative supply or ground connection |
| Контакт 5 | IN B+ — Non-inverting input of amplifier B |
| Контакт 6 | IN B- — Inverting input of amplifier B |
| Контакт 7 | OUT B — Output of amplifier B |
| Контакт 8 | V+ — Positive supply connection |
Типичное применение
LM2904FVJ-E2 подходит для 6 применениеs: Low-Side Shunt Current Sensing, Portable Battery Monitoring, Industrial Sensor Signal Conditioning, Ground-Referenced Instrumentation, Audio and Communication Input Buffers, Legacy Control-System Maintenance.
Low-Side Shunt Current Sensing
The LM2904FVJ-E2 fits low-side shunt sensing because its input and output common-mode ranges include ground, allowing the shunt voltage to be measured without shifting the signal upward. Place one amplifier channel across a low-value shunt and use the second channel for gain, filtering, or an independent monitor. The 3 V to 32 V operating range covers many battery and industrial rails, while the two-channel package reduces component count. Before production, verify input offset, bias-current error, noise, shunt power dissipation, and output swing against the required measurement accuracy.
Рекомендуется
Portable Battery Monitoring
The LM2904FVJ-E2 is appropriate for ground-referenced battery monitoring in portable equipment because both channels can process signals near the 0 V rail. One channel can amplify a battery or cell-sense input while the other provides filtering, thresholding, or a buffered reference. Its 3 V minimum supply allows operation from common portable rails, and the ground-sense capability can reduce the need for a negative bias supply. Confirm quiescent current, battery input range, accuracy, and sleep requirements before using this not-recommended-for-new-designs device in a new platform.
Рекомендуется
Industrial Sensor Signal Conditioning
The LM2904FVJ-E2 can condition grounded sensor outputs in industrial systems where the signal is close to 0 V. Its dual-channel architecture supports two related inputs, such as a sensor measurement and a temperature or calibration channel. The wide 3 V to 32 V supply range suits equipment operating from multiple industrial rails, while the compact TSSOP-BJ package saves board space. Design the front end around the source impedance, use stable feedback values, and verify input bias current, common-mode limits, noise, and output drive for the selected sensor.
Рекомендуется
Ground-Referenced Instrumentation
The LM2904FVJ-E2 suits instrumentation in which transducers and reference points are tied to ground. Its input and output ground-sense behavior makes it possible to amplify small bipolar-in-practice signals without introducing a midscale offset or negative supply. One channel can amplify the measurement while the second can provide an active filter or reference buffer. The 32 V total dual-supply capability supports higher-voltage bench equipment, but designers should validate offset, input bias current, noise, output swing, and stability using the manufacturer electrical characteristics.
Рекомендуется
Audio and Communication Input Buffers
The LM2904FVJ-E2 can serve as a ground-referenced buffer in audio or communication interfaces when the signal level is small and the source impedance is manageable. Its two channels permit balanced handling of related input and feedback paths, while operation to ground suits single-supply systems. The wide supply range accommodates legacy industrial communication boards, but bandwidth, slew rate, output swing, noise, and channel separation must be compared with the signal requirements. Use decoupling and short feedback traces to prevent instability or noise coupling.
Рекомендуется
Legacy Control-System Maintenance
The LM2904FVJ-E2 is most practical in maintenance and repair of legacy control boards that already use the ROHM LM2904 ground-sense implementation. Its established 8-pin TSSOP-BJ footprint and familiar 2-channel architecture allow engineers to preserve an existing PCB while sourcing an equivalent configuration. The 3 V to 32 V supply range covers many 5 V, 12 V, 24 V, and 32 V-class systems, but production changes should include pinout, electrical, lifecycle, and package-drawing reviews. For genuinely new control platforms, select an amplifier in the manufacturer's current portfolio.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для LM2904FVJ-E2 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LM2904PW | LM2904B | LM2904LV | LM2904 | LM358 |
|---|---|---|---|---|---|---|
| Brand | ROHM Semiconductor | ROHM Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin TSSOP-BJ | 8-pin TSSOP | 8-pin TSSOP | 8-pin TSSOP | 8-pin TSSOP | 8-pin TSSOP |
| Amplifier Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Product Type | Ground-sense operational amplifier | Ground-sense operational amplifier | General-purpose operational amplifier | Low-voltage operational amplifier | General-purpose operational amplifier | General-purpose operational amplifier |
Ключевые отличия
- Purpose-built ground-sense operation (против LM358)
- Same-family maintenance path (против LM2904PW)
- Wide single-supply operating range (против LM2904LV)
- Established 32 V total dual-supply limit (против LM2904B)
Заметки по проектированию
Use the ROHM pin-description table to assign the two amplifier channels and keep each feedback loop physically small. Connect the supply bypass capacitor directly between the V+ and V- pins, and route V- as a low-impedance return rather than through a shared plane segment carrying motor, relay, or switching currents. For shunt sensing, place the amplifier and Kelvin sense connections so copper resistance does not add directly to the measured voltage.
Do not assume that all dual operational amplifiers sharing eight pins are interchangeable. The LM2904FVJ-E2 is a ground-sense device, and replacement selection must compare input and output common-mode limits, input offset voltage, bias current, noise, slew rate, output swing, stability, and the maximum total supply voltage. The suffix-specific package drawing and lifecycle status must also be checked before approving a substitution.
For small shunt or sensor voltages, treat source resistance and bias current as part of the signal path. Confirm that input bias current times total source resistance is below the permitted error, and use resistor values that preserve stable closed-loop operation with the device's recommended feedback network. A 0.1 uF local bypass capacitor can be considered alongside the manufacturer's recommended bulk decoupling, but capacitance and stability criteria should come from the datasheet.
The amplifier generally dissipates little power in a high-impedance sensing circuit, but output-current load and supply voltage determine dissipation. Estimated: P equals the sum of output-stage quiescent dissipation and load-current times output-voltage-overhead. Use the manufacturer's output-current and thermal-resistance limits to establish worst-case conditions. Avoid placing either channel close to a heat source that could raise its junction temperature.
Информация о соответствии
The manufacturer identifies the product as not recommended for new designs and not recommended for design diversion. No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified in the cited product information.
