RC4152

www.fairchildsemi.com RC4152 Voltage-to-Frequency Converters Features Single supply operation Pulse output DTL/TTL/CMOS compatible Programmable scale factor (K) High noise rejection Inherent monotonicity Easily transmittable output Simple full scale trim Single-ended input, referenced to ground V-F or F-V conversion Voltage or current input Wide dynamic range Signal isolation: – VFC—opto-isolaton—FVC – ADC with opto-isolation Signal encoding: – FSK modulation/demodulation – Pulse-width modulation Frequency scaling DC motor speed control Description The RC4152 is a monolithic circuit containing all of the active components needed to build a complete voltage-tofrequency converter. Circuits that convert a DC voltage to a pulse train can be built by adding a few resistors and capacitors to the internal comparator, one-shot, voltage reference, and switched current source. Frequency-to-voltage converters (FVCs) and many other signal conditioning circuits are also easily created using these converters. The RC4151 was the first monolithic VFC available and offers guaranteed temperature and accuracy specifications. The converter is available in a standard 8-pin plastic DIP. Applications Precision voltage-to-frequency converters Pulse-width modulators Programmable pulse generators Frequency-to-voltage converters Integrating analog-to-digital converters Long-term analog integrators Signal conversion: – Current-to-Frequency – Temperature-to-...