New Ultra Low Current Op Amp Ideal for Battery-Powered Automotive Applications

Rohm, a leading semiconductor manufacturer, has unveiled a groundbreaking linear operational amplifier (op amp) that boasts the lowest current consumption in the industry. The Rohm LMR1901YG-M op amp features a current consumption of just 160nA, making it ideal for amplifying sensor signals used in a wide range of applications, including temperature detection, flow rate measurement, gas concentration monitoring, and battery-powered designs.

In today's rapidly evolving consumer and industrial electronics landscape, the demand for advanced control systems is on the rise. This trend has created a growing need for accurate sensing of various parameters critical to the application, such as temperature, humidity, vibration, pressure, and flow rate. Op amps play a crucial role in the signal chain, significantly impacting both accuracy and power consumption.

By leveraging its original Nano Energy technology and refining the circuit design, Rohm has succeeded in developing an op amp that sets a new standard for current consumption in the market. The LMR1901YG-M's innovative ultra-low power technology effectively minimizes current fluctuations resulting from temperature and voltage changes, achieving a typical current consumption of 160nA, which is 38% lower than that of general low-power op amps.

One of the key advantages of the LMR1901YG-M is its exceptional stability across a wide temperature range from -40°C to +105°C. This feature ensures consistent low-power operation even in environments with fluctuating external temperatures, making it suitable for applications such as fire alarms and environmental sensors. Additionally, the op amp offers a 45% reduction in input offset voltage, with a maximum offset voltage temperature drift of 7V/°C, guaranteeing high-precision amplification of sensor signals.

Operating within a supply voltage range of 1.7V to 5.5V, the LMR1901YG-M provides rail-to-rail input/output capabilities and complies with the automotive reliability standard AEC-Q100, ensuring stable performance in challenging conditions like vehicle cabins. To facilitate circuit design and simulation, Rohm offers various technical documents and SPICE models for the op amp, which can also be used with the Rohm Solution Simulator to accelerate time-to-market.

Looking ahead, Rohm remains committed to advancing power savings in op amps through its proprietary ultra-low power technology. The company aims to further enhance performance by reducing noise and offset, thereby increasing power efficiency and expanding the power supply voltage range. For more information on the innovative LMR1901YG-M op amp and Rohm's latest developments, visit www.rohm.com.