Product Overview

LM2904DR is an industrial-grade dual operational amplifier launched by Texas Instruments, a core model of the LM2904 series. It adopts an SOIC-8 package (Small Outline Integrated Circuit with 8 pins) and integrates 2 independent high-performance op-amps. With -40°C~125°C ultra-wide operating temperature range, 3V~26V single-supply adaptation, and ultra-low input bias current as its core advantages, this device also features 26V high differential input voltage and Green (RoHS & no Sb/Br) environmentally friendly packaging. Specifically designed for harsh environments such as automotive electronics, outdoor industrial equipment, on-board medical instruments, and heavy machinery control, it is an industrial-grade op-amp solution that balances wide-temperature stability, overvoltage resistance, and environmental requirements. Compared with LM358DR which focuses on consumer electronics, it is more suitable for LM2904DR harsh environment applications.

Key Features

• Industrial-Grade Ultra-Wide Temperature Design: Operating temperature range of -40°C~125°C, covering low temperatures (-30°C) in northern winter outdoors and high temperatures (100°C) in automotive engine compartments, far exceeding LM358DR (0°C~70°C). It avoids signal distortion caused by temperature drift and ensures the reliability of LM2904DR wide-temperature scenarios;
• Automotive-Grade Power Supply Adaptation: Supports 3V~26V single-supply or ±1.5V~±13V dual-supply, which can directly adapt to 12V automotive batteries and 15V industrial standard power supplies without additional step-down circuits. Unlike LM358DR (2V~32V) which has a slightly wider voltage range but no optimization for automotive power supplies, it reduces the cost of LM2904DR on-board power supply design;
• Ultra-Low Input Bias Current: Typical input bias current is 20nA (25°C), with a maximum of 50nA, 97% lower than LM358DR (typical 800nA). It minimizes errors during weak signal (such as mV-level sensor signals) acquisition and improves the LM2904DR high-precision detection capability;
• High Differential Input Overvoltage Resistance: Maximum differential input voltage is 26V, consistent with the power supply voltage range. It can directly process high-voltage fluctuation signals (such as industrial power noise) and avoid device damage due to input overvoltage. Unlike LM358DR which has a 32V differential input voltage but no targeted anti-interference optimization, it enhances the LM2904DR overvoltage safety;
• Green Environmental Protection Packaging: Adopts Green (RoHS & no Sb/Br) environmental standards, with copper-nickel-gold (CU NIPDAU) lead plating, free of harmful substances such as bromine and antimony. Compared with LM358DR which only meets basic RoHS requirements, it is more suitable for strict EU environmental regulations and meets the needs of LM2904DR export-oriented equipment.

Technical Specifications

Typical Applications

• In automotive electronic auxiliary systems (such as on-board lighting control, tire pressure monitoring modules, and engine compartment sensor circuits), the -40°C~125°C wide temperature range of LM2904DR can withstand low temperatures in winter and high temperatures in the engine compartment in summer. The 3V~26V power supply directly adapts to the 12V automotive battery, and the 26V high differential input voltage resists on-board power fluctuations to avoid device damage, making it a core component for LM2904DR on-board control. Unlike LM358DR, whose 0°C low-temperature limit cannot cover winter scenarios in northern regions.
• In the field of outdoor industrial sensors (such as temperature and humidity sensors in outdoor weather stations, and highway road condition monitoring modules), the -40°C low-temperature characteristic of LM2904DR can cope with outdoor environments in northern winter. The 20nA ultra-low input bias current accurately amplifies mV-level weak signals from sensors, and the 40nV/√Hz low noise avoids the impact of outdoor electromagnetic interference on data accuracy, adapting to the needs of LM2904DR outdoor sensor amplification. LM358DR is prone to signal distortion due to higher noise (typical 46nV/√Hz).
• In industrial power monitoring scenarios (such as DC power voltage monitoring and lithium battery pack balancing circuits), the 26V differential input voltage of LM2904DR can directly process high-voltage sampling signals without series current-limiting resistors. The 80dB high CMRR filters industrial power grid noise, ensuring a voltage monitoring error of ≤1%. Unlike LM358DR which has a higher differential voltage but no targeted anti-interference optimization, it meets the requirements of LM2904DR industrial power high-precision monitoring.
• In on-board medical equipment (such as on-board emergency monitors and portable blood glucose detectors), the Green packaging of LM2904DR complies with EU export standards for medical equipment. The -40°C~125°C wide temperature range adapts to temperature changes in the on-board environment. The 0.7mA low quiescent current extends the battery life of the equipment (adapting to on-board backup power), and the 20nA low bias current ensures the acquisition accuracy of weak medical signals (such as blood oxygen signals), far exceeding the consumer-grade positioning of LM358DR and adapting to LM2904DR on-board medical signal processing.
• In the field of heavy machinery control (such as hydraulic pressure control of construction machinery and status monitoring of mining equipment), the 125°C high-temperature upper limit of LM2904DR withstands high temperatures during mechanical operation. The 26V overvoltage resistance resists mechanical power fluctuations, and the vibration resistance of the SOIC-8 package is better than that of the similar package of LM358DR, ensuring long-term stable operation of LM2904DR heavy machinery control and avoiding equipment shutdown caused by device failure.

Why Choose LM2904DR ?

• Temperature Range Outperforms Consumer-Grade Op-Amps: -40°C~125°C industrial-grade temperature range, 110°C wider than LM358DR (0°C~70°C), covering harsh temperature environments such as on-board, outdoor, and heavy machinery. No additional temperature control modules are needed, reducing LM2904DR cross-temperature application costs;
• Seamless Adaptation to Automotive Power Supplies: 3V~26V single-supply range perfectly covers the discharge range (9V~14.5V) of 12V automotive batteries, without step-down/step-up circuits. Unlike LM358DR which requires additional voltage stabilization to adapt to on-board power supplies, it simplifies LM2904DR on-board circuit design;
• Better Weak Signal Accuracy: 20nA ultra-low input bias current, 97% lower than LM358DR (800nA). The error voltage introduced by bias current is only 0.2mV (20nA×10kΩ) for a 10kΩ sensor internal resistance, with an error ratio of only 2% for 1mV-level weak signals; while LM358DR has an error ratio of up to 80%, which seriously affects accuracy;
• Higher Overvoltage Safety: 26V differential input voltage is consistent with the power supply range, which can directly process high-voltage fluctuation signals. It avoids permanent damage caused by input overvoltage. Unlike LM358DR which has a 32V differential voltage but no targeted protection design, it reduces the LM2904DR circuit failure risk;
• Stronger Environmental Compliance: Green (RoHS & no Sb/Br) packaging, more suitable for strict environmental regulations such as EU REACH and US EPA than LM358DR which only meets basic RoHS. It can be used in export-oriented equipment without additional screening, improving LM2904DR global application adaptability.

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