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    Artasie Real-Time Clock - AM1805

    Precision Timing with Minimal Power.

    The Ambiq® Artasie AM1805 Real-Time Clock with Power Management delivers a powerful combination of ultra-low power and advanced functionality. Powered by Ambiq’s Subthreshold Power Optimized Technology (SPOT®) CMOS platform, it achieves energy consumption as low as 14 nA.

    Where to Buy
    Design Resources

    Detailed Functional Block Diagram for Ambiq Artasie RTC - AM1805

    The AM1805 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 a I2C

    serial interface for communication with a host controller. An integrated
    power switch and a sophisticated system sleep manager with counter,
    timer, alarm, and interrupt capabilities allows the AM1805 to be used as
    a supervisory component in a host microcontroller based system.

    Pin Configuration Diagram for Ambiq Artasie RTC - AM1805

    Specifications

    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

    Advanced Timekeeping

    • Integrated power optimized RC oscillator
    • Advanced crystal calibration to ± 2 ppm
    • Advanced RC calibration to ± 16 ppm
    • Automatic calibration of RC oscillator to crystal oscillator
    • Watchdog timer with hardware reset
    • 256 bytes of general purpose RAM

    Power Management

    • Integrated ~1Ω power switch for off-chip components such as a host MCU
    • System sleep manager for managing host processor wake/sleep states
    • External reset signal monitor
    • Reset output generator
    • Supercapacitor trickle charger with programmable charging current
    • Automatic switchover to Voltage of the Battery (VBAT)
    • External interrupt monitor
    • Programmable low battery detection threshold
    • Programmable analog voltage comparator

    Ultra-Low Power Flexible Serial Peripherals

    • I2C (up to 400 kHz) serial interface

    Wide Operating Range

    • Operating Voltage: 1.5-3.6 V
    • Clock and RAM Retention Voltage: 1.5-3.6 V
    • Operating Temperature: -40°C to 85°C
    • All inputs include Schmitt Triggers

    Applications

    • Smart Cards
    • Wireless Sensors and Tags
    • Medical Electronics
    • Utility Meters
    • Data Loggers
    • Appliances
    • Handsets
    • Consumer Electronics
    • Consumer Equipment

    Package Options

    • 3 mm x 3 mm 16-pin QFN package (also available in wafer form)

    Ordering Information

    • AM1805AQ
    • AM1805I2CEVB (EVB)

    Where to Buy

    Artasie RTC AM1805 AM1805AQ
    Artasie AM1805
    AM1805AQ
    Artasie RTC AM1805 EVB AM180512CEVB
    Artasie AM1805
    Evaluation Board
    AM180512CEVB

    Design Resources

    Browse our Design Resources which includes product briefs, datasheets, selector guides, family brochures, white papers, quick start guides, and more to help you learn more about products.

    Additional Documentation

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    Artasie

    Parameters

    Ultra-Low Supply Current

    Baseline Timekeeping

    Crystal (XT) Oscillator

    Number of GP Outputs

    Advanced Timekeeping

    RC Oscillator

    Calibration/Auto-calibration

    Watchdog Timer (WDT)

    RAM (Bytes)

    Enhanced I/O and Power Management

    VBAT Switch

    External Interrupts

    Reset Management

    Power Switch and Sleep Finite State Machine (FSM)

    Programmable Charging Current

    Interface

    Interface

    Wide Operating Range

    Operating Voltage

    Operating Temperature

    Package Options

    Ordering Information

    Artasie AM1805

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    4

    256

    I²C up to 400 kHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package
    (also available in wafer form)

    • AM1805AQ
    • AM1805I2CEVB (EVB)

    Artasie AM1815

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    3

    256

    3/4-wire SPI up to 2 MHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package
    (also available in wafer form)

    • AM1815AQ
    • AM1815SPIEVB (EVB)

    Artasie AM1815-old

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    3

    256

    3/4-wire SPI up to 2 MHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package
    (also available in wafer form)

    • AM1815AQ
    • AM1815SPIEVB (EVB)

    Artasie AM1805-old

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    4

    256

    I²C up to 400 kHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package
    (also available in wafer form)

    • AM1805AQ
    • AM1805I2CEVB (EVB)

    Artasie AM0815

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    3

    256

    3/4-wire SPI up to 2 MHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package

    • AM0815AQ
    • AM1815SPIEVB (EVB)

    Artasie AM0805

    < 14nA with RC oscillator
    < 22nA with RC oscillator
    and autocalibration
    < 55nA with crystal oscillator

    4

    256

    I²C up to 400 kHz

    1.5-3.6 V

    -40°C to 85°C

    3 mm x 3 mm, 16-pin QFN package

    • AM0805AQ
    • AM1805I2CEVB (EVB)

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