Ultra-Low Power Consumption for Long Device Use
Murata Manufacturing Co., Ltd. has started mass production of the MRMS166R and MRMS168R anisotropic magnetoresistance (AMR) sensors. These sensors are designed to extend battery life in healthcare, wearable, and IoT devices. The announcement was made on 27th April 2023 in Kyoto, Japan.
The MRMS166R sensor stands out for its ultra-low power consumption, operating on an average current of just 20 nA from a 1.2 V supply. This makes it ideal for devices powered by coin cell batteries, extending their operational life significantly.
These solid-state magnetic sensors are utilised in switching applications. They detect magnetic fields to control device functions such as transitioning between active and sleep modes. This capability allows for more reliable, contactless switching without mechanical components, improving device durability.
Applications in Healthcare and Wearables
Automatic switching between modes is crucial in battery-powered devices to reduce power consumption. In healthcare, these sensors are used in capsule endoscopes and medical patches. Wearable technology such as AR glasses and wireless earbuds also benefits from this technology, improving device lifespan.
The MRMS166R measures just 1.0 × 1.0 × 0.4 mm, making it suitable for compact designs. It operates over a voltage range of 1.2 to 3.6 V. Meanwhile, the MRMS168R offers a higher output drive capability, suitable for devices requiring increased load current with its 80 nA average current consumption and operation over a 2.0 to 3.6 V range.
Murata addressed the challenge of maintaining stable operation at low voltage by redesigning the AMR sensor’s internal circuitry. This redesign enables ultra-low current consumption, significantly reducing battery drain during standby operation. As a result, devices can operate for more than two years in typical use.
These sensors are used in various applications, including security-related IoT devices such as door open/close detection systems and smart locks. The sensors’ ability to minimise current consumption while maintaining stable operation makes them essential in modern technology.
Murata plans to expand its AMR sensor lineup and further reduce power consumption to enhance device functionality and operating times. This development aligns with the growing demand for efficient medical, wearable, and IoT devices, as energy efficiency becomes crucial.
For more details on the AMR sensor lineup, including MRMS166R and MRMS168R, visit Murata’s product page. Murata Manufacturing Co., Ltd. continues to innovate in the field of miniaturized electronic components, supporting advancements in various technology sectors.
Last updated: 27 April 2026, 5:18 pm
