LM2904PWRG3 - Dual 26V 700kHz Op Amp | Texas Instruments
Артикул: LM2904PWRG3 ✓ АктивенLM2904PWRG3 Обзор
An operational amplifier is a voltage-gain semiconductor that uses high open-loop gain and negative feedback to amplify small voltage differences. The dual-amplifier configuration belongs to the broader hierarchy of analog signal-chain ICs, analog ICs, and semiconductors. Operational amplifiers are commonly used in sensor conditioning, current sensing, error amplifiers, voltage followers, filters, and signal-conversion circuits where a predictable closed-loop response is more important than very high speed.
The LM2904PWRG3 is designed for cost-sensitive, general-purpose systems rather than precision or high-speed signal-chain applications. According to the Texas Instruments LM2904 product information, the device is specified as a dual 26 V, 700 kHz operational amplifier. The manufacturer documentation also describes the LM2904 family as providing two independent, high-gain, frequency-compensated amplifiers that can operate from a single supply or split supplies. A low 0.7 mA typical supply-current drain is identified in the device documentation, helping reduce system power consumption when both channels remain active.
The wide supply-voltage capability makes the amplifier applicable to industrial control, automotive-style signal conditioning, test equipment, and embedded analog interfaces. Each amplifier can be configured with external resistors or capacitors as an inverting amplifier, non-inverting amplifier, voltage follower, comparator-style stage, or active-filter element. Internal frequency compensation removes the need for an external compensation capacitor in ordinary closed-loop configurations, simplifying implementation while preserving stable operation for typical feedback networks.
The TSSOP-8 package provides a compact surface-mount footprint suitable for high-density analog boards. Because the device supports single-supply or split-supply operation, the circuit designer must still define the input common-mode range and output swing relative to the selected rails. Input and output voltages must remain within the limits defined by the manufacturer datasheet, and unused amplifier inputs should be biased to prevent undefined operation.
This product page combines the verified manufacturer characteristics, package information, sourcing links, application guidance, and drop-in comparison data into an engineering-focused reference. It also highlights where the LM2904PWRG3 is appropriate and where higher precision, wider bandwidth, lower noise, or automotive qualification is required. Review the pin-description table and recommended operating conditions in the manufacturer datasheet before final PCB release or substitution to another dual amplifier.
Аналоги без доработки для LM2904PWRG3 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
LM2904QPWRQ1
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Открыть даташит →LM2904PWRG3 Максимальные параметры и электрические характеристики
| Amplifier Type | General Purpose |
| Number of Amplifiers | 2 circuits |
| Architecture | Two independent, frequency-compensated operational amplifiers |
| Maximum Total Supply Voltage | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| Slew Rate | 0.3 V/us |
| Typical Supply Current | 0.7 mA |
| Supply Configuration | Single supply or split supply |
| Корпус | 8-TSSOP (PW), 0.173 in / 4.40 mm width |
| Тип монтажа | Surface Mount |
| Packaging | Tape and Reel (TR) |
Руководство по цоколевке LM2904PWRG3 в корпусе 8-tssop (pw), 0.173 in / 4.40 mm width
Цоколевка для LM2904PWRG3 (корпус 8-tssop (pw), 0.173 in / 4.40 mm width). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для LM2904PWRG3.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
LM2904PWRG3 подходит для 6 применениеs: Industrial Sensor Signal Conditioning, Audio Preamplifier and Output Buffering, Power Supply Feedback and Error Amplification, Data Acquisition Front End, Current Sensing and Signal Conversion, Motor and Control System Interfaces.
Industrial Sensor Signal Conditioning
The LM2904PWRG3 suits general-purpose sensor-conditioning circuits where two independent amplifier channels simplify conditioning of paired or related signals. Its 700 kHz gain-bandwidth product and 0.3 V/us slew rate provide ample closed-loop bandwidth for many temperature, pressure, and analog-control signals without requiring a high-speed amplifier. The two internally compensated channels can implement non-inverting or inverting gain stages, level shifts, and active filters. Confirm the sensor output lies within the input common-mode range and verify the output swing before using either channel.
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Audio Preamplifier and Output Buffering
The LM2904PWRG3 can provide general-purpose amplification and buffering in modest audio paths because it includes two independent, frequency-compensated amplifier channels. Its 700 kHz gain-bandwidth product covers audio-band closed-loop designs, while the 0.3 V/us slew rate helps support low-distortion output slewing. The amplifier is not positioned as a low-noise audio device, so system-level noise analysis remains important. Keep the two channels properly terminated and confirm the target output swing against the chosen supply rails.
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Power Supply Feedback and Error Amplification
The LM2904PWRG3 can implement error amplification or feedback monitoring in power-control loops that operate within its 26 V total supply rating. Two independent channels allow one stage to monitor a regulated rail while the other handles a reference or control comparison. The 0.3 V/us slew rate is adequate for many low-bandwidth regulation loops, and the documented 0.7 mA typical supply-current drain reduces overhead in modestly powered systems. Compensation and stability must be designed around the actual converter topology.
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Data Acquisition Front End
The LM2904PWRG3 is suitable for front-end amplification in general-purpose data-acquisition systems that do not require the very low offset or bias currents of precision amplifiers. Each independent channel can amplify a differential sensor pair or provide separate gain and buffering stages. The 700 kHz gain-bandwidth product supports moderate-bandwidth measurements, and the 8-TSSOP package saves board area in multi-channel instruments. Choose the closed-loop gain carefully because effective bandwidth and output-swing limits depend on the feedback network and supply voltage.
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Current Sensing and Signal Conversion
The LM2904PWRG3 can amplify the voltage produced by a current-sense shunt and provide a second channel for scaling, offsetting, or buffering. Its dual architecture reduces the number of packages needed when multiple related analog signals must be conditioned. The 0.3 V/us slew rate is suitable for many moderate-bandwidth current-measurement loops, while the 26 V supply capability provides headroom for industrial signal chains. Care must be taken to keep common-mode input voltage within the manufacturer’s operating limits.
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Motor and Control System Interfaces
The LM2904PWRG3 can serve as a general-purpose interface amplifier in motor-control and embedded control boards handling command, feedback, or diagnostic signals. Two independent channels support separate control paths within one 8-TSSOP package, while the 700 kHz gain-bandwidth product and 0.3 V/us slew rate are suitable for many low-bandwidth loops. A split supply can simplify bipolar signal handling when permitted by the datasheet. Protection, filtering, and output-current limits must be evaluated for each external node.
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Сводка рекомендуемых товаров
Справочные инженерные данные для LM2904PWRG3 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | LM2904QPWRQ1 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 8-TSSOP (PW) | 8-TSSOP (PW) |
| Number of Amplifiers | 2 | 2 |
| Amplifier Type | General Purpose | General Purpose |
| Qualification Tier | Standard | Q1 automotive version |
Ключевые отличия
- Two general-purpose amplifier channels in one compact package (против LM2904QPWRQ1)
- 26 V total supply-voltage capability (против LM2904QPWRQ1)
- 700 kHz bandwidth and 0.3 V/us slew rate (против LM2904QPWRQ1)
Заметки по проектированию
Verify the input common-mode range and output swing against the actual supply voltage before closing the feedback loop. The LM2904PWRG3 supports single and split supplies, but neither input nor output is automatically allowed to reach every supply rail. Bias or terminate every unused amplifier input so it does not operate in an indeterminate state, and use the manufacturer pin-description table rather than a generic TSSOP layout.
Place the input, output, feedback, and decoupling connections to keep high-impedance amplifier nodes physically short. Connect each supply pin to a low-impedance plane or local bypass path, and route the two channels to minimize shared return-current paths when they carry different signals. Although the 8-TSSOP package is compact, adequate copper around the pins improves thermal performance and reduces coupling between the two amplifier channels.
Select feedback resistors with values that balance noise, bias-current error, and power consumption, and keep the feedback network close to the amplifier pins. The documented 700 kHz gain-bandwidth product and 0.3 V/us slew rate are adequate for general-purpose closed-loop stages, but the usable closed-loop bandwidth is also determined by noise gain and load. Add filtering where sensor inputs, long PCB routes, or switching nodes could introduce unwanted high-frequency energy.
Calculate the amplifier’s dissipation from its actual supply and output voltages rather than assuming that a 26 V rating is an operating point. The documented typical supply-current drain is 0.7 mA, but total channel dissipation also depends on output swing, load current, and ambient temperature. Use a thermal-aware layout and confirm the maximum operating conditions in the manufacturer datasheet before using the device near the upper end of its supply capability.
Информация о соответствии
The standard LM2904PWRG3 is distinct from the LM2904QPWRQ1 automotive-qualified ordering option. Specific RoHS, REACH, halogen-free, lead-free, and conflict-minerals declarations were not established by the cited product records.
