The Ambiq Artasie RTC family serves as a companion part for host processors, including microcontrollers, radios, and digital signal processors. The Ambiq Artasie RTC family includes on-chip oscillators to provide minimum power consumption, full RTC functions including battery backup and programmable counters and alarms for timer and watchdog functions, and either an I2C or SPI serial interface for communication with a host controller.
Included are three distinct feature groups: (1) baseline timekeeping, (2) advanced timekeeping, and (3) power management. The baseline timekeeping feature group supports the standard 32.786 kHz crystal (XT) oscillation mode for maximum frequency accuracy with an ultra-low current draw of 55 nA. The advanced timekeeping feature group supports two additional oscillation modes: (1) RC oscillator mode, and (2) autocalibration mode. A proprietary calibration algorithm allows the Ambiq Artasie RTC to digitally tune the RC oscillator frequency and the XT oscillator frequency with accuracy as low as 2 ppm at a given temperature.
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