LM2904QD - Dual 26V 700kHz Automotive Op Amp | Texas Instruments
N.º da peça: LM2904QD ✓ AtivoLM2904QD Visão geral
An operational amplifier is an analog amplifier IC that uses high open-loop gain to amplify voltage differences between its non-inverting and inverting inputs. The LM2904 belongs to the broader hierarchy of operational amplifier, voltage-feedback amplifier, analog IC, and semiconductor. Its dual-channel configuration allows two amplifier sections to be used for signal conditioning, buffering, sensing, or feedback-control functions without adding a second package.
The LM2904QD is identified as an automotive temperature-grade variant. Its 26 V supply capability accommodates automotive-style power rails, while the 700 kHz gain-bandwidth product supports general-purpose closed-loop signal amplification at moderate frequencies. The dual architecture also reduces component count in systems that need two equivalent amplifier channels. Operation from a single positive supply is a defining family characteristic, although common-mode range, output swing, offset, and noise figures should be checked against the manufacturer datasheet for the exact operating conditions.
The 8-terminal SOP package uses gull-wing leads and a rectangular body, making LM2904QD suitable for conventional through-hole board assembly rather than a compact surface-mount land pattern. Because the automotive suffix denotes a qualified ordering configuration, engineers should confirm the exact qualification, temperature range, marking, and production-test requirements in the Texas Instruments ordering information before release to manufacturing.
Typical applications include automotive sensor interfaces, actuator-driver feedback paths, battery-monitoring circuits, instrumentation signal conditioning, and low-frequency control loops. In each case, the two amplifier sections can process complementary or independent signals. The 700 kHz bandwidth is generally more relevant to low-bandwidth sensing and feedback than to high-speed signal processing, so applications requiring wide-band precision or rail-to-rail output should be reviewed separately.
The principal design consideration is error budget: input offset voltage, input bias current, common-mode input range, output voltage swing, supply current, and stability with the selected feedback network determine practical accuracy. Decoupling capacitors should be placed close to the supply pins, and unused amplifier inputs should be biased according to the manufacturer’s recommended configuration. PCB layout should preserve a low-impedance ground return and avoid long feedback traces.
This page combines the Texas Instruments family specifications, package details, drop-in alternatives, and implementation guidance into an engineering-focused reference. It also identifies which parameters require confirmation in the full manufacturer datasheet, helping designers distinguish confirmed LM2904QD characteristics from application-specific design requirements.
Alternativas drop-in para LM2904QD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LM2904QD (mesmo formato e footprint) — diferindo em Package, Amplifier Type, Common-Mode Input Range, Gain-Bandwidth Product, Input Offset Voltage.
LM2904QDRQ1
✅ Drop-In✗ Fora de estoque
$0.22 / unidade
Ver ficha técnica →LM2904QDRG4Q1
✅ Drop-InConsulte o preço
Ver ficha técnica →LM2904D
✅ Drop-InConsulte o preço
Ver ficha técnica →LM2904M
✅ Drop-InConsulte o preço
Ver ficha técnica →LM2904DR
✅ Drop-InConsulte o preço
Ver ficha técnica →LM2904QD Classificações máximas e características elétricas
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Amplifier Channels | 2 channels |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 700 kHz |
| Temperature Grade | Automotive |
| Package Code | SOP |
| Number of Terminals | 8 terminals |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
| AEC-Q100 Qualification | Automotive-grade device; qualification details require confirmation |
Guia de Configuração de Pinos do LM2904QD rectangular
Configuração de pinos para LM2904QD (pacote rectangular). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para LM2904QD.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LM2904QD é adequado para 6 aplicaçãos: Automotive Sensor Signal Conditioning, Battery Monitoring and Signal Conditioning, Actuator Driver Feedback, Industrial Instrumentation Interface, Power Supply Feedback and Monitoring, Data Acquisition and ADC Driver.
Automotive Sensor Signal Conditioning
The Texas Instruments LM2904QD fits automotive sensor conditioning because it combines two amplifier channels in one 8-terminal SOP package with a 26 V maximum supply rating and 700 kHz gain-bandwidth product. One section can amplify or buffer a sensor signal while the other can provide gain, offsetting, or feedback functions. The dual topology reduces component count and PCB space in electronic-control modules. Its automotive-grade ordering designation supports use in automotive programs, subject to the exact qualification and temperature requirements. The 700 kHz bandwidth is appropriate for many position, pressure, temperature, and current-sensing loops, but offset, bias current, common-mode range, and output swing must remain inside the electrical limits for the selected gain and sensor impedance.
Recomendado
Battery Monitoring and Signal Conditioning
The LM2904QD is applicable to battery-monitoring front ends that must operate from a supply rated up to 26 V while processing low-level differential signals. Its two amplifier sections can support separate gain and filtering stages without requiring two packages. The 700 kHz gain-bandwidth product provides useful bandwidth for current, voltage, and temperature acquisition loops, while the dual configuration leaves one section available for buffering a reference or driving an ADC input. Design work should verify the common-mode input range against the battery voltage range and the output swing against the ADC input limits. Decoupling should be placed near the supply pins, and layout should minimize trace lengths in the sensitive input path.
Recomendado
Actuator Driver Feedback
LM2904QD can be used in an actuator-control module to amplify a driver feedback element and close a current- or position-control loop. Its two amplifier sections allow one channel to sense feedback while the other can amplify the error signal, while the 26 V supply rating is useful in systems with elevated automotive rails. The 700 kHz bandwidth is suitable for many slow-to-moderate servo and valve-control loops rather than high-bandwidth motion stages. Correct compensation and stable feedback-network layout are essential. Verify output-current demand, output swing, saturation recovery, and common-mode limits because the general-purpose dual amplifier is intended primarily for signal conditioning rather than directly driving large capacitive loads.
Recomendado
Industrial Instrumentation Interface
The LM2904QD provides two general-purpose amplifier channels for low-frequency industrial instrumentation where a 26 V supply and 700 kHz gain-bandwidth product are sufficient. It can condition transducer outputs, buffer high-impedance sensors, or implement differential-to-single-ended conversion before an ADC. The dual 8-terminal SOP package simplifies assembly on through-hole instrument boards and reduces the number of packages compared with two single amplifiers. The primary limitations are input offset, bias current, common-mode range, output swing, and noise, all of which influence the achievable accuracy. Select resistor values that preserve loop stability, keep input nodes physically close, and use a clean ground reference. Confirm the final accuracy and temperature performance against the manufacturer datasheet.
Recomendado
Power Supply Feedback and Monitoring
The LM2904QD can monitor a regulated rail by amplifying the difference between a feedback node and a reference, then conditioning that error for a controller or comparator. Its 26 V supply capability makes it relevant to higher-voltage monitoring circuits, and the dual arrangement can provide separate channels for output-voltage and current measurements. With a 700 kHz gain-bandwidth product, the amplifier is well suited to many control and telemetry loops that do not require high-speed transient analysis. Designers must ensure the amplified error remains within the common-mode input range and that the output can reach the required logic or ADC threshold. Decouple the supply close to the IC and avoid routing high-current return paths through the measurement ground.
Recomendado
Data Acquisition and ADC Driver
LM2904QD can provide the final amplification or buffering stage in a low-speed data-acquisition chain. Two channels can serve an analog input multiplexer output or two multiplexed sensor channels, while the 700 kHz bandwidth is suitable for many multiplexed sensor systems operating below several hundred kilohertz. The 26 V maximum supply rating supports industrial and automotive environments, but it does not by itself guarantee output to the rails. Check the output-swing specification against the ADC input range and ensure the selected closed-loop gain remains stable with the ADC input capacitance. Use short, guarded traces from the amplifier output to the ADC and establish a single-point ground return for the analog section.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM2904QD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LM2904QDRQ1 | LM2904QDRG4Q1 | LM2904D | LM2904M | LM2904 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | STMicroelectronics |
| Amplifier Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Number of Terminals | 8 | 8 | 8 | 8 | 8 | 8 |
Principais diferenciais
- Automotive-grade configuration with dual amplification (vs LM2904D)
- Closest same-brand automotive ordering match (vs LM2904QDRQ1)
- Moderate-bandwidth dual amplifier in a through-hole package (vs LM2904M)
Notas de projeto
Place the LM2904QD close to the signals it conditions and follow the manufacturer’s recommended decoupling arrangement. Keep the feedback-loop traces short, avoid routing them beside switching-node or motor-current paths, and provide a continuous ground plane where possible. Because the package has 8 gull-wing terminals, verify the physical footprint against the drawing in the manufacturer datasheet rather than relying only on the generic 8-SOIC designation.
Do not assume that a 26 V maximum supply rating guarantees acceptable input or output voltage ranges. Check the common-mode input range, output swing, supply current, and input offset against the actual signal. Use feedback resistors that provide the required gain without creating excessive noise or bandwidth, and bias unused amplifier inputs according to the manufacturer’s recommendations to avoid saturation and unstable behavior.
The 700 kHz gain-bandwidth product places the LM2904QD in the general-purpose, moderate-bandwidth class. Account for noise gain, closed-loop bandwidth, settling time, and the capacitance of the following device when selecting a closed-loop gain. For ADC interfaces, isolate the amplifier output with a suitable resistor or isolation network when the ADC presents significant capacitive loading, and route the return current away from sensitive reference nodes.
Confirm that the selected supply remains below the 26 V maximum rating under transient conditions, including automotive load-dump and supply-line disturbances where applicable. Add effective local supply bypassing and keep power-loop current out of the analog ground path. The amplifier’s quiescent and output-current consumption must be included in the overall thermal and power-budget calculation for the module.
Informações de conformidade
Texas Instruments identifies the LM2904-Q1 family as automotive grade. Exact AEC-Q100 qualification wording, RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations should be confirmed on the manufacturer product page and in the applicable compliance documentation.
