AM0815AQ

Overview

The Ambiq Micro AM0815AQ is a Real-Time Clock (RTC) integrated circuit designed for ultra-low power applications. It features an SPI interface and operates within a supply voltage range of 1.5V to 3.6V on VCC, with battery backup support from 1.4V to 3.6V on VBAT. The device maintains timekeeping current consumption between 0.17µA and 0.22µA at 1.8V to 3V. It includes 256 bytes of RAM, supports HH:MM:SS:hh time formats in both 12/24-hour modes, and YY-MM-DD-dd date formats. Packaged in a 16-VFQFN exposed pad (3x3mm), it functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Ultra-low power consumption with timekeeping current as low as 0.17µA @ 1.8V
• Integrated 256-byte RAM for data storage and configuration
• Supports Alarm, Leap Year, Square Wave Output, Trickle Charger, Unique ID, and Watchdog Timer
• Dual oscillator options with digital calibration and autocalibration capabilities

Applications

• Battery-powered IoT sensors requiring precise timekeeping
• Wearable devices with strict power budget constraints
• Industrial equipment needing watchdog timer functionality
• Smart home devices utilizing trickle charging for backup batteries

Procurement Notes

Verify the specific suffix 'AQ' against the manufacturer's ordering information to confirm package type and tape/reel specifications. Ensure compatibility with SPI bus voltage levels when interfacing with host controllers. Confirm that the 16-QFN (3x3) footprint matches the PCB layout requirements. Check for RoHS compliance status if required by local regulations.

Selection Notes

Select the AM0815AQ over the AM0805 variant if 256 bytes of RAM are required, as the AM0805 typically offers less memory. Consider the SPI interface requirement; if I2C is preferred, verify if other family members offer that protocol. Evaluate the need for autocalibration features to maintain accuracy without external references. Ensure the operating temperature range of -40°C to 85°C meets the environmental conditions of the target application.

Part Context

The AM0815AQ belongs to the Artasie AM08X5 series of real-time clocks from Ambiq Micro. This series focuses on ultra-low power performance combined with sophisticated feature sets like autocalibration and extensive interrupt capabilities. The AM08X5 family is designed to replace traditional RTCs in applications where power efficiency and compact size are critical, offering significant improvements in latency and power usage compared to older generations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Ambiq Micro's official cross-reference tools or contact technical support for verified alternatives.