LM2904EDR2G - Dual Low-Power Operational Amplifier | onsemi
Артикул: LM2904EDR2G ✓ АктивенLM2904EDR2G Обзор
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification with negative feedback to create stable, controlled gain. The dual-amplifier configuration combines two amplifier sections in one package, reducing board area compared with two separate single amplifiers. Its common-mode input range extending toward ground or VEE is particularly useful in single-supply systems, where signals may be referenced close to the lower supply rail.
The LM2904EDR2G is positioned as a low-power, general-purpose amplifier rather than a high-speed or precision device. Its dual-channel architecture supports independent signal paths within one package, while single-supply or split-supply operation allows integration into both grounded and bipolar-style signal chains. The 8-SOIC package provides a familiar surface-mount footprint suitable for conventional PCB assembly.
The LM2904 family derives its circuit design from the same basic architecture used in quad operational amplifiers, with the LM2904 providing two amplifier sections. This family positioning supports familiar design conventions and makes the device relevant to applications previously addressed by discrete or multi-package amplifier arrangements. Exact input offset, bandwidth, current, noise, and voltage-limit figures should be confirmed against the manufacturer datasheet for the selected operating condition.
Typical applications include DC sensor amplification, low-side current sensing, audio preamplification, industrial signal conditioning, temperature-measurement circuits, and portable equipment powered from a single battery. In each case, the dual section can process two related or independent channels while operating close to the lower supply rail. Decoupling and grounding remain important because they directly affect stability and measured signal quality.
For PCB implementation, place the device power pins and input and output traces according to the manufacturer pin-description table. Use a stable reference ground, route sensitive input lines away from switching nodes, and provide local supply bypassing to limit disturbance reaching the amplifier. Verify the final circuit against minimum gain, output swing, slew rate, and common-mode limits before production.
This product page combines the exact ordering information with practical guidance for dual-amplifier selection, pinout use, power-rail planning, and replacement assessment. It also identifies compatible circuit roles and highlights where engineers must verify operating limits rather than assume that every low-power dual amplifier is interchangeable.
Аналоги без доработки для LM2904EDR2G — 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 LM2904EDR2G (тот же форм-фактор и посадочное место) — отличается по Amplifier Type, Common-Mode Input Range, Package.
LM2904D
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Открыть даташит →LM2904EDR2G Максимальные параметры и электрические характеристики
| Product Type | Dual operational amplifier |
| Amplifier Channel Count | 2 channels |
| Корпус | 8-SOIC |
| Тип монтажа | Surface mount |
| Amplifier Type | Standard general-purpose amplifier |
| Power Consumption | Low power drain |
| Common-Mode Input Range | Extends to ground or VEE |
| Supply Configuration | Single supply or split supply |
Конфигурация выводов LM2904EDR2G
| Контакт 1 | OUT1 — Amplifier 1 output |
| Контакт 2 | -IN1 — Inverting input for amplifier 1 |
| Контакт 3 | +IN1 — Non-inverting input for amplifier 1 |
| Контакт 4 | V- — Negative supply or ground connection |
| Контакт 5 | +IN2 — Non-inverting input for amplifier 2 |
| Контакт 6 | -IN2 — Inverting input for amplifier 2 |
| Контакт 7 | OUT2 — Amplifier 2 output |
| Контакт 8 | V+ — Positive supply connection |
Типичное применение
LM2904EDR2G подходит для 6 применениеs: Battery-Powered Sensor Signal Conditioning, Industrial Low-Side Current Sensing, Audio Preamplification, Temperature and Resistance Measurement, Portable Control and Monitoring, Communications Interface Conditioning.
Battery-Powered Sensor Signal Conditioning
The LM2904EDR2G fits two-channel sensor conditioning because it combines 2 general-purpose amplifier sections in one 8-SOIC package and supports low power drain. Its common-mode input range extends toward ground or VEE, which is useful when a resistive or active sensor produces a signal close to the lower supply rail. Each section can buffer or amplify a sensor output before an ADC or controller input. The designer should verify the exact common-mode range, output swing, supply limits, and offset requirements in the onsemi datasheet, then connect local supply bypassing to minimize supply noise and ground disturbance.
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Industrial Low-Side Current Sensing
The LM2904EDR2G can support two low-side current-sense channels in industrial monitoring equipment because its dual topology reduces the number of amplifier packages and associated board area. The common-mode input capability extending toward ground or VEE is useful when the shunt voltage remains close to the lower rail. Both amplifier sections can be configured with external gain-setting resistors while sharing the same supply and reference ground. Layout must keep the high-impedance inputs away from switching nodes, and the final design must verify input offset, bandwidth, output range, and supply limits for the highest expected current.
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Audio Preamplification
The LM2904EDR2G can provide two independent general-purpose preamplifier stages for microphone, audio-sensor, or line-level signal paths. Its single-supply or split-supply flexibility lets it work in battery-powered portable equipment as well as conventional dual-rail audio circuits, while the common-mode range extending toward ground or VEE supports single-supply signal designs. Because this is a general-purpose rather than a specified low-noise audio amplifier, the engineer should review noise, gain-bandwidth, output swing, and distortion limits. Follow the manufacturer application guidance and use short, shielded input routing to reduce interference.
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Temperature and Resistance Measurement
The LM2904EDR2G is suitable for bridge or resistive temperature-measurement front ends that require two amplifier channels. One section can amplify the sensor signal while the other can generate or buffer a reference, or the two sections can handle two related sensing channels. The low-power-drain characteristic is valuable in portable instruments, and common-mode operation toward ground or VEE can simplify single-supply sensing. Select external resistor values to set the required gain, account for input offset and drift in the accuracy budget, and confirm the onsemi electrical limits at the intended temperature and supply conditions.
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Portable Control and Monitoring
The LM2904EDR2G fits portable control equipment requiring two independent analog channels for actuator feedback, sensor amplification, threshold detection, or error amplification. Low power drain and single-supply operation are useful in handheld and battery-powered systems, while the 8-SOIC package supports compact surface-mount assembly. The two sections should be evaluated independently for gain, input and output range, stability, and channel-to-channel use. Provide a low-noise supply, maintain a continuous ground reference, and keep feedback components close to the device to reduce parasitic effects in the completed controller.
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Communications Interface Conditioning
The LM2904EDR2G can condition two low-frequency communications or instrumentation signals when the design requires a general-purpose amplifier rather than a high-speed differential device. Its dual-channel package is useful for a transmit-and-receive pair, differential amplifier stage, or two receiver channels. Single-supply capability and common-mode input operation toward ground or VEE simplify systems powered from a single rail. Keep input routing short and away from clocks, switching converters, and high-current return paths. Confirm bandwidth, slew rate, output swing, and common-mode limits before using the device for higher-frequency or precision communications tasks.
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Сводка рекомендуемых товаров
Справочные инженерные данные для LM2904EDR2G — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LM2904D | LM2904 |
|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | onsemi | onsemi | Texas Instruments |
| Amplifier Channel Count | 2 channels | 2 channels | 2 channels |
| Product Type | General-purpose operational amplifier | General-purpose operational amplifier | Dual operational amplifier |
Ключевые отличия
- Two amplifier channels share one compact 8-SOIC package (против LM201AD)
- Single-supply and split-supply operating flexibility (против TLV2402ID)
- Same-family onsemi replacement path (против LM2904)
Заметки по проектированию
Use a local decoupling capacitor from the positive supply pin to the negative supply or ground reference, with the connection and capacitor placed as close to the device as practical. Because both amplifier sections share the package supply pins, supply disturbance can affect both channels. Establish the required single-supply or split-supply levels from the onsemi electrical limits, and confirm the output-swing margin at the intended load rather than relying only on nominal supply voltage.
Route the two non-inverting inputs directly to their sensing sources without long parallel runs beside switching nodes. Keep the two amplifier sections' feedback resistors close to their corresponding pins, and provide a continuous ground plane beneath the device where practical. The LM2904EDR2G can accept single-supply operation with its common-mode range extending toward ground or VEE, but input bias current, output loading, and leakage can create errors near the lower rail.
Do not treat a shared 8-SOIC footprint as proof that every LM2904 ordering code is interchangeable. Compare the exact suffix, temperature range, supply limits, common-mode range, output swing, offset, bandwidth, slew rate, and noise requirements before replacing a part. Also avoid treating the general-purpose LM2904 architecture as a precision amplifier when measurement error or drift dominates the application.
Информация о соответствии
The product search did not provide explicit compliance declarations for this ordering code. Confirm RoHS, REACH, automotive qualification, lead-free status, halogen-free status, and conflict-minerals documentation with onsemi before release.