ATMEGA8HVA-4CKU

Overview

The ATMEGA8HVA-4CKU is an 8-bit AVR microcontroller designed for smart battery applications, featuring 8KB of in-system programmable Flash memory. It operates within a voltage range of 1.8V to 9V and supports speeds up to 4MHz. The device integrates a high-resolution Coulomb Counter ADC for current measurements and a 12-bit Sigma-Delta ADC for voltage monitoring. Key features include autonomous battery protection, secure authentication modules, and Deep Under-voltage Recovery (DUVR) capabilities.

Feature Summary

• Integrated autonomous battery protection circuitry with over-current and short-circuit safeguards
• High-resolution Coulomb Counter ADC enabling precise accumulated current measurements
• Deep Under-voltage Recovery (DUVR) mode supporting pre-charging of deeply discharged cells
• On-chip debugWIRE system facilitating in-system programming and debugging

Applications

• Smart battery management systems for one or two series-connected Li-ion cells
• Battery packs requiring high security and accurate fuel gauging
• Portable electronic devices utilizing low-power lithium-ion power sources

Procurement Notes

Verify the specific speed grade suffix '4' corresponds to the required 4MHz operational frequency during procurement. Confirm package availability as the datasheet lists LGA and TSOP options; ensure the ordered unit matches the intended PCB footprint. Check for NDA-restricted secure authentication features if those functions are required for the design.

Selection Notes

Select this component when designing for single or dual-cell lithium-ion batteries requiring integrated protection and monitoring. The ATmega8HVA variant provides 8KB Flash, whereas the ATmega16HVA offers 16KB; choose based on code size requirements. Ensure the application benefits from the dedicated Coulomb Counter ADC for high-accuracy state-of-charge calculations.

Part Context

This microcontroller belongs to the AVR Smart Battery family, specifically engineered for lithium-ion cell management. It combines standard AVR RISC processing with specialized analog peripherals for battery safety. The device addresses the need for cost-effective, monolithic solutions that integrate fuel gauging, protection logic, and communication interfaces.

Replacement Considerations

The ATmega16HVA serves as a direct functional substitute with increased Flash memory capacity. Designers should verify interrupt vector table sizes and memory allocation compatibility when migrating between these variants.