LM2904DR - Dual 26V 700kHz Op Amp | Texas Instruments
N.º de pieza: LM2904DR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.32 | $0,32 |
| 10 | $0.26 | $2,60 |
| 100 | $0.19 | $19,00 |
| 500 | $0.15 | $75,00 |
| 1.000 | $0.12 | $120,00 |
| 2.500 | $0.1 | $250,00 |
LM2904DR Descripción general
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block of analog electronics within the hierarchy: op amp -> amplifier IC -> linear IC -> semiconductor. General-purpose dual op amps like the LM2904 integrate two independent amplifiers in one package, reducing board space and component count compared to two single op amps.
Key features include a gain bandwidth product of 700 kHz, a slew rate of 0.3 V/us, and an input offset voltage of 2 mV (typical). The common-mode input voltage range includes ground, enabling direct ground-sensing in single-supply systems. The output swings close to the negative rail, and internal short-circuit protection plus a latch-up-free input stage make the device robust in automotive and industrial environments.
The LM2904 uses bipolar transistor architecture with a class AB output stage, providing low output impedance and reasonable drive capability. Internal frequency compensation guarantees unity-gain stability without external components, and supply current is essentially independent of supply voltage. Quiescent drain of 0.7 mA (typical) suits battery-powered designs.
Typical applications include transducer amplifiers, DC gain blocks, active filters, voltage followers, and signal conditioning front-ends in automotive ECUs, industrial sensors, and consumer electronics. According to the TI LM2904 datasheet, no latch-up occurs when the common-mode range is exceeded, an advantage in voltage-follower circuits.
Design tip: decouple VCC with a 0.1uF ceramic capacitor placed close to pin 8, keep inputs within the specified common-mode range for best accuracy, and note the output can drive loads down to about 2 kohm; use a buffer stage for heavier loads. Pricing references are as of 2026-08-30.
Alternativas directas para LM2904DR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LM2904DR (mismo factor de forma y huella) — difiere en Slew Rate, Package, Amplifier Type, Input Offset Voltage, Operating Temperature.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LM2904BDR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM2904BADR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM2904QDRQ1
✅ Sustitución directa✓ En stock
$0.22 / unidad
Ver hoja de datos →LM358DR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.0514 / unidad
Ver hoja de datos →LM2904DR
✅ Sustitución directa✓ En stock
$0.1 / unidad
Ver hoja de datos →LM2904BPT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC33202DR2
⚡ Mismo encapsulado ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LM2904DR Valores máximos y características eléctricas
| Number of Channels | 2 |
| Supply Voltage (Single) | 3 V to 26 V |
| Supply Voltage (Dual) | ±1.5 V to ±13 V |
| Gain Bandwidth Product | 700 kHz |
| Slew Rate | 0.3 V/us |
| Input Offset Voltage | 2 mV (typical) |
| Quiescent Current (per amplifier) | 500 uA (typical) |
| Total Supply Current | 0.7 mA (typical) |
| Common-Mode Input Range | Includes ground |
| Output Stage | Class AB |
| Input Stage Latch-Up | Latch-up free |
| Short-Circuit Protection | Internal |
| Temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 8-SOIC (D) |
| Tipo de montaje | Surface Mount |
| Amplifier Type | General Purpose |
Configuración de pines de LM2904DR
| Pin 1 | OUT1 — Amplifier 1 output |
| Pin 2 | IN1- — Amplifier 1 inverting input |
| Pin 3 | IN1+ — Amplifier 1 non-inverting input |
| Pin 4 | GND / V- — Ground (single supply) or negative supply |
| Pin 5 | IN2+ — Amplifier 2 non-inverting input |
| Pin 6 | IN2- — Amplifier 2 inverting input |
| Pin 7 | OUT2 — Amplifier 2 output |
| Pin 8 | VCC / V+ — Positive supply, 3 V to 26 V (single supply) |
Aplicaciones típicas
LM2904DR es adecuado para 6 aplicacións: Automotive Sensor Signal Conditioning, Industrial Transducer Amplification, Battery-Powered Portable Devices, Active Filter Networks, DC Gain Blocks and Voltage Followers, Motor Control and Monitoring Interfaces.
Automotive Sensor Signal Conditioning
The LM2904DR's -40C to +125C operating range and 26V supply tolerance make it well suited for automotive sensor front-ends such as throttle position, coolant temperature, and battery voltage monitoring. The ground-including common-mode input range allows direct sensing of ground-referenced sensors on a 12V single supply, while the latch-up-free input stage tolerates fault conditions common in vehicle wiring harnesses. Each amplifier draws only 500 uA, keeping ECU quiescent budgets low; for ASIL-critical paths, the AEC-Q100-qualified LM2904QDR variant is a pin-compatible upgrade requiring no PCB change.
Recomendado
Industrial Transducer Amplification
Industrial transducers - pressure bridges, thermocouples, and strain gauges - produce millivolt-level signals that the LM2904DR amplifies using a gain of 10 to 100 configured with 1% feedback resistors. The 700 kHz bandwidth is ample for slow industrial process signals, and the 26V maximum supply permits operation directly from 24V industrial rails with adequate headroom. Internal short-circuit protection protects the amplifier against wiring faults in noisy factory environments, and the 0.7 mA total supply current suits loop-powered and battery-backed sensor nodes.
Recomendado
Battery-Powered Portable Devices
With 500 uA quiescent current per amplifier and supply current independent of supply voltage, the LM2904DR extends battery life in portable instrumentation, metering, and handheld test products. The 3V minimum single-supply rating allows direct operation from two alkaline cells or one lithium cell, and the output swings close to ground, maximizing usable signal range on low rails. Two amplifiers in one 8-SOIC package reduce board area versus two single op amps, and internal compensation removes the cost and drift of external compensation networks.
Recomendado
Active Filter Networks
The LM2904DR implements Sallen-Key and multiple-feedback active filters for audio and control-band frequencies up to roughly 70 kHz at moderate gains, respecting its 700 kHz gain bandwidth product. Internal unity-gain stability guarantees predictable filter response without external compensation, and the class AB output stage drives standard filter impedance levels of a few kilohms. Dual amplifiers per package enable second-order filter sections in a single SOIC-8, cutting component count in signal conditioning chains for industrial and consumer audio products.
Recomendado
DC Gain Blocks and Voltage Followers
As a DC gain block or voltage follower, the LM2904DR leverages its 2 mV typical input offset voltage and latch-up-free input stage that survives common-mode overrange - a documented datasheet advantage for follower circuits driven by power supplies or sensors exceeding the input range. Ground-including input range allows 0V-referenced buffering on single supplies, and the output swinging to the negative rail preserves accuracy at low signal levels. The amplifier tolerates capacitive loads typical of ADC inputs and reference buffering with modest isolation resistors.
Recomendado
Motor Control and Monitoring Interfaces
In motor drive systems, the LM2904DR conditions shunt-resistor current signals and temperature feedback for MCUs such as the C2000 family. The 26V supply rating tolerates supply transients on 12V and 24V motor-control boards, while the ground-sensing input range reads low-side shunt voltages directly. Its 0.3 V/us slew rate comfortably tracks PWM-averaged current loops at kHz-scale bandwidths, and industrial temperature ratings survive enclosed drive environments. Thresholds and fault comparators pair naturally with TI comparators on the same rail.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LM2904DR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM2904BDR | LM2904QDR | LM358DR | LM2904DR (Rohm) |
|---|---|---|---|---|---|
| Package | 8-SOIC (D) | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC (D) - same | 8-SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ROHM Semiconductor |
| Gain Bandwidth Product | 700 kHz | 700 kHz | 700 kHz | 1 MHz (typ) | 700 kHz |
| Supply Voltage Range | 3 V to 26 V | 3 V to 36 V | 3 V to 26 V | 3 V to 32 V | 3 V to 26 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | 0C to +70C | -40C to +125C |
| Automotive Grade | No (standard industrial) | No | Yes (AEC-Q100) | No | No |
Diferenciadores clave
- Extended temperature range (frente a LM358DR)
- Lower cost pin-to-pin upgrade exists (frente a LM2904BDR)
- Non-automotive cost point (frente a LM2904QDR)
Notas de diseño
Place a 0.1uF ceramic decoupling capacitor as close as possible to pin 8 (VCC) with a short return to pin 4 (GND). Although the LM2904 is slow by modern standards, two amplifiers sharing one supply pin can couple output transients; a 0.1uF local bypass plus bulk 1-10uF reservoir capacitance prevents crosstalk between amplifier 1 and amplifier 2 channels on the same die.
Keep inputs within the common-mode range for best accuracy: the input range includes ground but stops roughly 1.5V below VCC. Driving an input above this range causes output phase issues in some op amps - the LM2904 is latch-up free per the TI datasheet, but accuracy degrades. Also note the output can source less current than it sinks; design load resistances of about 2 kohm or higher and add a buffer stage for heavier loads.
With 0.7 mA typical quiescent drain, self-heating is negligible in most designs; the SOIC-8 junction-to-ambient resistance around 100-130 C/W is not a limiting factor at typical loads. However, driving low-impedance loads near the output short-circuit limit can raise dissipation - keep output current modest and rely on the internal protection only as a fault safeguard, not as continuous operating mode.
Información de cumplimiento
RoHS status based on DigiKey listing of standard TI SOIC-8 offering. Use LM2904QDR for AEC-Q100 automotive applications. Verify REACH and halogen-free status on TI product page.
