The Ambiq® Artasie Real-Time Clock AM1805 with Power Management provides a groundbreaking combination of ultra-low power coupled with a highly sophisticated feature set. With power requirements significantly lower than any other industry RTC (as low as 14 nA), these are the first semiconductors based on Ambiq’s innovative SPOT® (Subthreshold Power Optimized Technology) CMOS platform.
Serves as a companion part for host processors including microcontrollers, radios, and digital signal processors.
Includes three distinct feature groups: 1) baseline timekeeping, 2) advanced timekeeping, and 3) power management.
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.
A proprietary calibration algorithm allows the AM1805 to digitally tune the RC oscillator frequency and the XT oscillator frequency with accuracy as low as 2 ppm at a given temperature.
Advanced timekeeping feature group supports two additional oscillation modes: 1) RC oscillator mode, and 2) Autocalibration mode.
Includes a finite state machine that can control a host processor as it transitions between sleep/reset states and active states.
Integrates a power switch with ~1 Ω impedance that can be used to cut-off ground current on the host microcontroller and reduce sleep current to <1 nA.
Serves as a companion part for host processors including microcontrollers, radios, and digital signal processors.
Includes three distinct feature groups: 1) baseline timekeeping, 2) advanced timekeeping, and 3) power management.
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.
A proprietary calibration algorithm allows the AM1805 to digitally tune the RC oscillator frequency and the XT oscillator frequency with accuracy as low as 2 ppm at a given temperature.
Advanced timekeeping feature group supports two additional oscillation modes: 1) RC oscillator mode, and 2) Autocalibration mode.
Includes a finite state machine that can control a host processor as it transitions between sleep/reset states and active states.
Integrates a power switch with ~1 Ω impedance that can be used to cut-off ground current on the host microcontroller and reduce sleep current to <1 nA.
Ultra-Low Supply Current |
|---|
14 nA with RC oscillator |
22 nA with RC oscillator and Autocalibration |
55 nA with crystal oscillator |
Baseline Timekeeping |
|---|
4x GPIO Outputs |
32.768 kHz crystal oscillator with integrated load capacitor/resistor |
Counters for hundredths, seconds, minutes, hours, date, month, year, century, and weekday |
Alarm capability on all counters |
Programmable output clock generation (32.768 kHz to 1 year) |
Countdown timer with repeat function |
Automatic leap year calculation |
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