AM0805AQ

Overview

The AM0805AQ is an ultra-low power Real-Time Clock (RTC) from the Artasie I2C series, manufactured by Ambiq Micro. It operates within a supply voltage range of 1.5V to 3.6V and supports battery voltages from 1.4V to 3.6V. The device features timekeeping currents of 0.17µA to 0.22µA at 1.8V to 3V. It includes 256 bytes of RAM, an I2C interface, and functions such as alarms, leap year correction, square wave output, trickle charging, unique ID storage, and a watchdog timer. The component is housed in a 16-VFQFN exposed pad package (3x3 mm) and operates between -40°C and +85°C.

Feature Summary

• Ultra-low power consumption with timekeeping current of 0.17µA ~ 0.22µA @ 1.8V ~ 3V
• Integrated 256B RAM for data retention and configuration
• Supports Alarm, Leap Year, Square Wave Output, Trickle Charger, Unique ID, and Watchdog Timer
• I2C interface with operating temperature range of -40°C to +85°C

Applications

• Battery-powered IoT sensors requiring precise timekeeping
• Wearable electronics with strict power budget constraints
• Smart home devices needing low standby current
• Industrial monitoring systems operating in wide temperature ranges

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging options such as Tape & Reel or Cut Tape. Confirm that the 16-QFN (3x3) package dimensions align with your PCB footprint requirements. Check for any moisture sensitivity level updates prior to soldering.

Selection Notes

Select the AM0805AQ when an I2C interface is required for system integration. Ensure the application voltage falls within the 1.5V to 3.6V range for VCC and 1.4V to 3.6V for VBAT. Consider the 256B RAM capacity if significant non-volatile data storage is needed alongside timekeeping functions.

Part Context

The AM0805AQ belongs to the Artasie family of real-time clocks, which are designed for high precision and low power consumption. This model specifically utilizes the I2C communication protocol, distinguishing it from SPI variants like the AM1805. It shares architectural similarities with other members of the AMx8x5 series, allowing for potential driver reuse across different interface types.

Replacement Considerations

For direct pin-to-pin replacements with identical functionality, consider the AM0815AQ (SPI interface variant may require software changes). Cross-vendor equivalents include the AB0805 from Abracom or RV1805 from Microcrystal, provided register compatibility is verified.