The new op amp improves power savings for consumer and industrial equipment

     Rohm has developed a linear operational amplifier (op amp)- the LMR1901YG-M - with the lowest current consumption in the industry. This makes it ideal for amplifying sensor signals to detect and measure temperature, flow rate, gas concentration, and other parameters in applications powered by internal sources (i.e. batteries).

     In recent years, advanced controls have increased the demand for a variety of consumer and industrial electronics applications. As a result, there is an increasing demand for accurate sensing of application-specific parameters such as temperature, humidity, vibration, pressure, and flow. The main function of the operational amplifier is to amplify the sensor signal for subsequent detection and/or analog-to-digital conversion, and is a key component in the signal chain, which has a great impact on accuracy and power consumption. The company is developing operational amplifiers to meet the dual needs of high accuracy and low current consumption by further refining circuit designs based on original nanoenergy technology. The company can now offer an opamp that offers the lowest current consumption on the market.

     The device uses an original ultra-low power technology that completely suppresses current increases due to temperature and voltage changes, reducing current consumption to only 160nA (typp.) It is about 38% lower than the general low-power operation amplifier. This extends the life of applications powered by internal batteries, such as electronic shelf labels, and helps extend the working time of smartphones and other devices equipped with rechargeable batteries. At the same time, this low current consumption does not change in the temperature range of -40 ° C to +105 ° C, even in environments with external temperature fluctuations (including fire alarms and environmental sensors), it can also achieve stable low-power operation.

     Other performance enhancements include a 45% reduction in the input offset voltage to only 0.55mV(Max). Ta=25C) higher than the general small current op amp, while ensuring the maximum input bias voltage temperature drift of 7V/C. This allows high-precision amplification of the sensor signal. The device can operate in the supply voltage range from 1.7V to 5.5V and provides rail-to-rail input/output, making it ideal for a variety of industrial equipment and consumer market applications. Its new operational amplifier also complies with the automotive reliability standard AEC-Q100, ensuring stable operation without compromising functionality even in harsh conditions, such as in the cabin of a car.

     In addition to the various technical documents required for circuit design and SPICE models for simulation, which are freely available on the company's website, the device can also be used with ROHM solution simulators to speed time to market.