ChronoDot V3 High Precision RTC

The ChronoDot RTC is an extremely accurate real time clock module, based on the MAX31328 temperature compensated RTC (TCXO). It includes a CR1632 battery which should last at least 8 years if the I2C interface is only used while the device has 5V power available. No external crystal or tuning capacitors are required. The MAX31328 has an internal crystal and a switched bank of tuning capacitors. The temperature of the crystal is continuously monitored, and the capacitors are adjusted to maintain a stable frequency. Other RTC solutions may drift minutes per month, especially in extreme temperature ranges…the ChronoDot will drift less than a minute per year. This makes the ChronoDot very well suited for time critical applications that cannot be regularly synchronized to an external clock. The ChronoDot can deliver ± 3.5ppm accuracy across the entire -40C to +85C temperature range, but can be significantly more accurate (1ppm) near room temperature (22C). The ChronoDot will plug into a st