LM2904ATH-13 - Dual General-Purpose Op Amp | Diodes Incorporated
N.º da peça: LM2904ATH-13 ✓ AtivoLM2904ATH-13 Visão geral
An operational amplifier is an analog building block that amplifies the difference between two input voltages. Within the broader semiconductor hierarchy, this product is a general-purpose operational amplifier, or op amp, used in analog signal chains, feedback-control loops, sensor interfaces, and buffer stages. The dual configuration allows one IC to implement two independent amplifier channels, reducing board area and simplifying designs that compare, amplify, filter, or condition two signals.
The LM2904ATH-13 provides two independent channels with high open-loop gain and approximately 700 kHz gain-bandwidth performance. Its general-purpose positioning makes it suitable for audio preamplification, transducer conditioning, DC signal amplification, and low-to-moderate-frequency control applications. The 8-pin TSSOP package supports compact surface-mount layouts, while the tape-and-reel suffix identifies the production packing format. Exact input-offset, input-bias-current, output-swing, noise, and temperature limits must be confirmed against the manufacturer datasheet for the exact ordering code.
The architecture is suited to conventional single-supply operation because the device can operate close to the positive rail while its output approaches the negative rail. Input common-mode range, output swing, slew rate, and stability conditions still determine whether a particular gain, load, and bypass-capacitor arrangement will meet the design objective. Decoupling should be placed close to the supply pins, and feedback components should be kept compact to minimize parasitic coupling and instability risk.
Typical uses include low-level audio stages, current-to-voltage conversion for sensor outputs, general comparator configurations, small-signal amplification, and feedback control around slower feedback loops. The two independent channels can also be configured as comparators, buffers, amplifiers, or differential amplifier sections where their internal characteristics permit the intended operation. Applications requiring very low offset, low noise, high speed, low power, or rail-to-rail output should not assume that a general-purpose LM2904 is the optimal choice.
For a robust design, begin with the manufacturer pin configuration and confirm the absolute-maximum ratings, common-mode limits, output-current capability, and recommended external-component values. Avoid using component-marking variants as substitutes without checking the exact pinout, supply range, temperature grade, and package. The TSSOP footprint also requires careful lead pitch and solder-joint inspection because its closely spaced leads are more difficult to inspect than wide-lead SOIC packages.
This product page combines the LM2904ATH-13 ordering information, a pin-compatible replacement framework, and practical analog-layout guidance. It highlights the critical decisions engineers must make when reusing an existing 8-pin TSSOP footprint while preserving supply-voltage, common-mode, output-swing, temperature, and load-current requirements.
Alternativas drop-in para LM2904ATH-13 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasLM2904ATH-13 Classificações máximas e características elétricas
| Product Type | Dual general-purpose operational amplifier |
| Number of Channels | 2 channels |
| Architecture | Dual independent operational amplifier |
| Maximum Supply Voltage | 36 V |
| Dual-Supply Operating Range | ±18 V |
| Single-Supply Operation | Up to 36 V |
| Gain-Bandwidth Product | Approximately 700 kHz |
| Encapsulamento | 8-pin TSSOP |
| Package Type | TSSOP-8 surface-mount package |
| Packing Format | Tape and reel |
Guia de Configuração de Pinos do LM2904ATH-13 tssop-8 surface-mount package
Configuração de pinos para LM2904ATH-13 (pacote tssop-8 surface-mount package). Este dispositivo de potência possui terminais de gate, drain e source. Para pacotes não polarizados, consulte o datasheet do fabricante para a orientação exata do pino 1 e detalhes do footprint. Aplicações comuns incluem projeto de fontes de alimentação, acionamento de motores e comutação de cargas.
Nenhum dado detalhado de pinagem disponível para LM2904ATH-13.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
LM2904ATH-13 é adequado para 6 aplicaçãos: General-Purpose Audio Preamplification, Sensor Signal Conditioning, Current-to-Voltage Conversion, DC Voltage Buffering, Feedback Control Loops, Comparator and Threshold Circuit.
General-Purpose Audio Preamplification
The LM2904ATH-13 is suitable for low-level audio preamplification because it provides two independent general-purpose amplifier channels with an approximately 700 kHz gain-bandwidth product in an 8-pin TSSOP. One channel can amplify a microphone or line-level signal while the other provides gain or buffering in a subsequent stage. The circuit must remain within the amplifier’s input common-mode and output-swing limits, and the feedback resistors should be selected for the intended closed-loop gain. For low-source-impedance audio signals, the LM2904’s bias-current behavior should be checked against the required DC precision. Its general-purpose architecture is well suited to conventional audio frequencies, while the compact TSSOP package helps reduce board area in mixed-signal products.
Recomendado
Sensor Signal Conditioning
The LM2904ATH-13 can condition low-to-moderate-frequency outputs from temperature, position, and analog sensors when two channels can be used for gain and buffering. Its approximately 700 kHz gain-bandwidth product is ample for many slowly changing sensor signals, while the wide supply capability supports systems operating from industrial-level rails. Confirm that the sensor’s output voltage remains inside the input common-mode range under every supply condition. Input bias current can create offset errors with high source impedance, so high-impedance sensors may require a bias resistor or a more suitable low-bias-current amplifier. Decoupling capacitors should be placed close to the supply pins, and the amplifier should be configured with stable closed-loop gain.
Recomendado
Current-to-Voltage Conversion
The LM2904ATH-13 is appropriate for a general-purpose transimpedance stage that converts a small sensor current into a measurable voltage. The approximately 700 kHz gain-bandwidth product supports many moderate-bandwidth measurements, while the two-channel package can provide signal gain in a second stage. The feedback resistor sets the conversion gain, and a parallel feedback capacitor can help limit bandwidth and maintain stability. Capacitance introduced by long sensor wiring, the op-amp input capacitance, and the feedback network must be checked together before increasing bandwidth. Because the LM2904 is a general-purpose amplifier rather than a dedicated transimpedance amplifier, designs requiring very low input bias current, wide common-mode range, or very high speed should use a device optimized for those parameters.
Recomendado
DC Voltage Buffering
The LM2904ATH-13 can serve as a unity-gain voltage buffer when the source impedance is compatible with its input-bias-current characteristics. Buffering prevents downstream loading from changing the signal level and is useful in power-control and measurement circuits. The device’s approximately 700 kHz gain-bandwidth product allows operation across low-to-moderate signal frequencies, but a unity-gain configuration requires confirmation of stability under the intended capacitive load. Keep the output connection short and place supply-bypass components near the IC pins to reduce supply noise and instability risk. When driving a capacitive load, resistive isolation may be necessary. Verify the DC output level against the input common-mode and output-swing limits because the output cannot necessarily reach either supply rail.
Recomendado
Feedback Control Loops
The LM2904ATH-13 can implement general-purpose negative-feedback control loops in power regulation, actuator positioning, and analog system-control circuits. Two channels permit separate control functions or a forward-path and feedback-path arrangement. The approximately 700 kHz gain-bandwidth product is suitable for slower loops, but compensation must account for the amplifier’s open-loop response, load, and plant dynamics. Place the feedback-network components close to the relevant pins and keep high-impedance input nodes small to minimize leakage and noise pickup. Output-current and output-swing requirements should be checked against the actuator or feedback network. If the loop must settle rapidly or operate with large capacitive loads, a higher-speed amplifier with suitable stability characteristics is generally preferable.
Recomendado
Comparator and Threshold Circuit
The LM2904ATH-13’s amplifier channels can be used as comparators for basic threshold detection because open-loop behavior forces the output toward a supply-dependent state. The part is appropriate for slow, low-frequency decisions where input and output voltages remain within the documented operating limits. A reference divider establishes the switching threshold, while hysteresis can be added with positive feedback to prevent oscillation near the threshold. The output must not be allowed to exceed its rated swing, and the supply arrangement should be compatible with the sensed voltage range. Since the LM2904 is primarily an amplifier, its propagation delay and behavior near the threshold can differ from a purpose-built comparator; use a dedicated comparator when precise timing, low offset, or fast overvoltage detection is required.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LM2904ATH-13 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Product Type | Dual general-purpose operational amplifier |
| Number of Amplifier Channels | 2 |
| Maximum Total Supply Voltage | 36 V |
| Dual-Supply Operating Range | ±18 V |
| Gain-Bandwidth Product | Approximately 700 kHz |
| Package | 8-pin TSSOP |
| Brand | Diodes Incorporated |
| Packing Format | Tape and reel |
| Mounting Type | Surface mount |
| Primary Application | General-purpose signal amplification |
Principais diferenciais
- Compact dual-amplifier surface-mount implementation (vs LM2904P3)
- Wide total supply-voltage capability (vs LM2904P3)
- Moderate-bandwidth general-purpose performance (vs LM2904P3)
Notas de projeto
Place the supply-bypass capacitors directly between the LM2904ATH-13 supply and ground pins, with the shortest possible traces. Keep the feedback resistors and any compensation capacitors adjacent to the amplifier pins to reduce parasitic feedback and improve transient stability. The 8-pin TSSOP footprint has relatively fine lead spacing, so inspect solder fillets and bridging carefully after assembly. Preserve a copper ground reference under and around the device where the package and board construction permit.
Separate the 36 V absolute supply capability from the recommended operating range and do not treat the maximum rating as a design target. Check input common-mode voltage, output swing, output current, and junction temperature under the worst combination of supply voltage, load, and ambient temperature. For a linear amplifier, the power dissipation is approximately the voltage dropped across the device multiplied by output current; evaluate that dissipation against the package thermal limits before operating continuously near the upper supply rating.
Configure the LM2904ATH-13 for a stable closed-loop gain and avoid placing high-impedance nodes next to noisy or switching signals. Feedback-node capacitance, cable capacitance, and load capacitance can alter stability and ringing. If driving a difficult capacitive load, add a small isolation resistor close to the output and verify the result with an oscilloscope. Maintain short ground returns so supply noise and switching currents do not share the same path as the analog input reference.
Do not substitute another LM2904 package solely because the amplifier family name matches. Compare the pinout, supply range, input common-mode limits, output swing, temperature range, and footprint before approving a replacement. Also verify whether the source resistance produces excessive offset from input bias current. An apparently identical eight-pin amplifier can still require PCB changes if its pin assignments or electrical limits differ.
Informações de conformidade
Compliance declarations were not identified in the accessible component information. Confirm the current RoHS, REACH, lead-free, halogen-free, automotive, and conflict-minerals status with Diodes Incorporated for the exact ordering code.