FREQUENCY-TO-VOLTAGE CONVERTER WITH SINGLE POWER SUPPLY COMPARATOR

The Fujitsu MB4206 is a frequency-to-voltage converter with an on-chip comparator. The MB4206 uses a charge pump driven by a positive-edge Schmitt trigger/flip-flop input so stable operation is achieved against noise signal input. The output of the comparator is zener-clamped to a reference voltage; thus, a precise hysteresis output is obtained. The overall design makes the circuit fairly tolerant of imperfections in the input waveform.

• Conversion coefficient determined by RC pair:
   VO(F) = FIN • RT • CT • VR
• Positive edge-triggered frequency input
• Equal internal reference high-level ouput and comparator high level output
• Package
   - 8-pin plastic SIP package (Suffix: -PS)