Rohm Unveils Op Amp with Record Low Current Consumption

ROHM has recently unveiled its latest innovation in the form of a linear op amp, the LMR1901YG-M, which the company claims boasts the lowest current consumption in the industry.

This cutting-edge technology makes the op amp ideal for amplifying sensor signals utilized in detecting and measuring various parameters such as temperature, flow rate, gas concentration, and more in applications powered by internal sources like batteries.

In today's rapidly evolving consumer and industrial electronics landscape, the demand for advanced control solutions has been on the rise. As a result, there is a growing need for precise sensing of critical parameters like temperature, humidity, vibration, pressure, and flow rate.

Op amps play a crucial role in amplifying sensor signals for subsequent detection and analog-to-digital conversion, significantly impacting both accuracy and power consumption in the signal chain.

ROHM is at the forefront of developing op amps that meet the dual requirements of high accuracy and low current consumption. Through the refinement of circuit design based on its proprietary Nano Energy technology, ROHM has succeeded in creating an op amp that sets a new standard for current consumption in the market.

The LMR1901YG-M leverages ROHM's original ultra-low power technology to effectively suppress current fluctuations caused by temperature and voltage changes, resulting in a remarkable current consumption of just 160nA (Typ.) – a substantial 38% lower than that of conventional low-power op amps.

This breakthrough not only extends the operational lifespan of battery-powered applications like electronic shelf labels but also enhances the battery life of devices such as smartphones equipped with rechargeable batteries.

Moreover, the op amp's low current consumption remains consistent across a wide temperature range from -40°C to +105°C, ensuring stable low-power operation even in environments with fluctuating external temperatures, such as fire alarms and environmental sensors.

With a 45% reduction in input offset voltage to a mere 0.55mV (Max. Ta=25°C) compared to general low-current op amps, the LMR1901YG-M enables highly accurate amplification of sensor signals, with a maximum input offset voltage temperature drift of 7V/°C guaranteed.

Capable of functioning within a supply voltage range of 1.7V to 5.5V and offering rail-to-rail input/output, the LMR1901YG-M is well-suited for a diverse array of applications in both industrial equipment and consumer markets.

ROHM's latest op amp also meets the stringent automotive reliability standard AEC-Q100, ensuring consistent performance even under challenging conditions such as vehicle cabins without compromising functionality.

In addition to providing various technical documents essential for circuit design and SPICE models for simulation, which are available for free on ROHM's website, the LMR1901YG-M can be seamlessly integrated with the ROHM Solution Simulator to accelerate time-to-market for developers.