Simple Charge Pump-Based 10MHz Voltage-to-Frequency Converter Application Circuit with 40dB Dynamic Range

A Seven-Nanosecond Comparator Using Single Supply Operation for a simple charge pump-based 10MHz voltage-to-frequency converter has 40dB dynamic range, operates from 5V supply. A 0V to 2.5V input produces a 0Hz to 10MHz output with 40dB of dynamic range, 1% linearity and 400ppm/degree Celsius gain drift. Power supply rejection is 0.5% for 4.75V to 5.25V supply excursions