Simplified Block Diagram
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- Accurate Fuel Gauge Uses V-to-F Method
- 8-Bit RISC Microcontroller Core
- 32kB of Program Flash
- 512 Bytes of Data Flash
- 776 Bytes of RAM
- 12-Bit ADC
- Watchdog Timer
- In-System Debug for Firmware Debugging
- Integrated Development Environment
- Notebook Battery Packs
- Proprietary Battery Packs
- Remote Data Logging
The MAX1785 includes a 12-bit data-acquisition unit to measure individual cell voltages, thermistor, instant current, and pack voltage. Individual cell voltage measurements with 0.5% accuracy and overcurrent protection allow the MAX1785 to eliminate a separate first-level protection IC. Internally adjustable overcurrent thresholds and delay timers provide a flexible solution.
The integrating fuel gauge module provides a typical input offset of less than 1µV and gain accuracy of better than 1% with no trimming required during pack manufacture. The MAX1785 has a wide 4V to 25V operating voltage range. The MAX1785 is available as a 38-pin TSSOP. The MAX1785 EV kit is available to assist with development.