Ultra-low power water flow measurement reference design for AMR

This fully tested reference design demonstrates a low-power solution for electronic measurement of water flow with a mechanical flow meter and provides a single-chip platform for water flow measurement and wireless communications. The design is ideal for automatic water meter reading (AMR) modules, which add wireless communications capabilities to existing mechanical flow meters. The radio frequency subsystem supports standard protocols such as wireless M-Bus or proprietary protocols in the sub-1GHz ISM band. This reference design provides the ability to accurately read mechanical rotation over long distances and provides greater reliability. Ultra-low power consumption reduces battery requirements and extends product life.

characteristic

• ● Single-chip integrated solution with flow meter metering and RF communication subsystems
• ●Meet ISO4064-1:2014-11 (Category 1) measurement accuracy requirements
• ● When the sampling frequency is 16Hz and the power supply voltage is 3.3V, the current consumption is 1.83µA
• ● Precise measurements can be made up to 5.8mm from the rotating disc
• ● Fully tested reference design with firmware, design files and test reports