Features
▪ Ultra-low supply current (all at 3V):
- 14 nA with RC oscillator
- 22 nA with RC oscillator and Autocalibration
- 55 nA with crystal oscillator
▪ Baseline timekeeping features:
- 32.768 kHz crystal oscillator with integrated
load capacitor/resistor
- Counters for hundredths, seconds, minutes,
hours, date, month, year, century, and week-
day
- 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 features:
- 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 features:
- Integrated ~1Ω power switch for off-chip com-
ponents such as a host MCU
- System sleep manager for managing host pro-
cessor wake/sleep states
- External reset signal monitor
- Reset output generator
- Supercapacitor trickle charger with program-
mable charging current
- Automatic switchover to VBAT
- External interrupt monitor
- Programmable low battery detection threshold
- Programmable analog voltage comparator
▪ I2C (up to 400 kHz) and 3-wire or 4-wire SPI (up
to 2 MHz) serial interfaces available
▪ Operating voltage 1.5-3.6 V
▪ Clock and RAM retention voltage 1.5-3.6 V
▪ Operating temperature –40 to 85 °C
▪ All inputs include Schmitt Triggers
▪ 3x3 mm QFN-16 package
▪ Also available in wafer form
Applications
▪ Smart cards
▪ Wireless sensors and tags
▪ Medical electronics
▪ Utility meters
▪ Data loggers
▪ Appliances
▪ Handsets
▪ Consumer electronics
▪ Communications equipment
Description
The Ambiq Micro AM18X5 Real-Time Clock with
Power Management family 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 Micro’s
innovative SPOTTM (Subthreshold Power Optimized
Technology) CMOS platform. The AM18X5 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. An integrated power switch and a
sophisticated system sleep manager with counter,
timer, alarm, and interrupt capabilities allows the
AM18X5 to be used as a supervisory component in a
host microcontroller based system.
am18x5_data_sheet_ds0003v1p2.pdf
(1 MB, 下载次数: 45)
|
发表于 2017-8-6 07:46:58
