DESIGN SOLUTION 7024

No More Kneeling to Check Your Water Meter


Abstract: With dramatic improvements in opex and operator/user efficiency, smart metering and automatic meter reading continue to be deployed for home utilities. When it comes to water and gas consumption measurement, these smart meter devices, which work remotely and untethered, operate on primary cells and are expected to have a lifetime of 10 years or greater. Wireless transmission remains the most popular connectivity mechanism; as a result, the device consumes nominal power for data collection and monitoring and most of the power for data transmission via RF. The challenge of powering the smart meter RF power amplifier is solved with the help of an efficient boost converter, the MAX8815A, and a supercapacitor.