Murata Manufacturing Co., Ltd.has begun mass production of its MRMS166R and MRMS168R anisotropic magnetoresistance (AMR) sensors for healthcare, wearable, and IoT devices. The MRMS166R is the first AMR sensor to combine an average power consumption of 20 nA with operation on a 1.2 V power supply, extending the battery life of coin cell systems.
These devices are solid-state magnetic sensors used for switching applications. They detect the presence or absence of a magnetic field and generate an output signal that the system logic uses to control functions such as transitions between active and standby modes. This enables contactless switching without mechanical components, improving reliability and allowing for sealed and miniaturized designs.
Automatic switching between active and standby modes is widely used in battery-powered devices to reduce standby power consumption and extend battery life. In healthcare, applications include capsule endoscopes and medical patches. Wearable devices, including augmented reality glasses and wireless earbuds, as well as security-related IoT devices such as door open/close detection systems and smart locks, also utilize this feature.
These devices typically use silver oxide button cells (usually 1.55 V), which imposes constraints on both available capacity and operating voltage. AMR sensors used as magnetic switches must therefore minimize current consumption while maintaining stable operation at low voltages. Murata addressed these requirements by redesigning the internal circuitry of the AMR sensor, enabling ultra-low current consumption and reliable operation down to 1.2 V. This significantly reduces battery consumption in standby mode, allowing the device to operate for over two years under normal usage conditions.
Both devices are housed in a compact package measuring 1.0 × 1.0 × 0.4 mm (0.04 × 0.04 × 0.02 in), making them suitable for space-constrained designs. The MRMS166R operates over a supply voltage range of 1.2 to 3.6 V (1.5 V typ.) with an average current consumption of 20 nA and a maximum output current of 1 mA. The MRMS168R operates over a supply voltage range of 2.0 to 3.6 V (3.0 V typ.), with an average current consumption of 80 nA and a maximum output current of 12 mA, providing greater output control capability for devices requiring higher load current.
Murata will continue to expand its range of AMR sensors and reduce power consumption to enable longer run times and improved functionality in medical, wearable and IoT devices.
For more details on the AMR sensor range, including the MRMS166R and MRMS168R models, please see the product page: [ MRMS166R , MRMS168R ]
For any questions regarding these products,
About Murata
Murata Manufacturing Co., Ltd. is a global leader in the design, manufacture, and sale of ceramic-based passive electronic components and solutions, communication modules, and power supply modules. Murata is committed to developing advanced electronic materials and cutting-edge, high-density, multifunctional modules. The company employs staff and has production facilities worldwide.
The text of this press release, being a translation, should not be considered official in any way. The only authoritative version of the press release is the original version in its source language. The translation should always be compared to the source text, which will prevail in case of any discrepancy.
Source link:https://www.businesswire.com/
