AM1805AQ
Overview
The AM1805AQ is an ultra-low power Real-Time Clock (RTC) with a built-in power management system designed to minimize energy consumption in battery-powered applications. It features an integrated power switch and a sophisticated system sleep manager that can completely disconnect power from a host microcontroller to eliminate standby leakage. Operating at current levels as low as 14 nA, it includes a 256-byte RAM, a watchdog timer, and a supercapacitor trickle charger.
Why Choose This Part
The primary advantage is the combination of extreme low power consumption (55 nA with crystal) and integrated power switching circuitry that can manage the power state of other components. It offers superior flexibility with its autocalibration feature, which allows the RC oscillator to be periodically calibrated against the crystal for high accuracy with lower power. The inclusion of a watchdog timer and 256 bytes of user RAM further reduces the external component count in minimalist embedded designs.
Applications
Key Specifications
Getting Started
To evaluate the AM1805AQ, connect it to a host MCU via the I2C interface and utilize the AM1805 evaluation board provided by Ambiq Micro. Ensure the VCC supply is between 1.5V and 3.6V, and use the integrated power switch (PSW) pin to control the power rail of your host processor for maximum energy savings. Use the manufacturer's provided C library to configure the autocalibration settings and the system sleep manager registers.
