Description of KA331N Frequency to Voltage Converter The KA331 voltage-to-frequency converters are ideally suited for use in simple low-cost circuits for analog-to-digital conversion, precision frequency to-voltage conversion, long term integration, linear frequency modulation or demodulation, and many other functions.The output when used as a voltage-to- frequency converter is a pulse train at a frequency precisely proportional to the applied input voltage. Thus, it provides all the inherent advantages of the voltage-to-frequency conversion techniques,and is easy to apply in all standard voltage-to-frequency converter applications. Further, it attains a new high level of accuracy versus temperature which could only be attained with expensive voltage-to-frequency modules. The KA331 utilizes a new temperature compensated band-gap reference circuit, to provide excellent accuracy over the full operating temperature range, at power supplies as low as 4.0V. The precision timer circuit has low bias currents without degrading the quick response necessary for 100 kHz voltage-to-frequency conversion.And the output is capable of driving 3 TTL loads, or a high voltage output up to 40V, yet is short-circuit-proof against VCC. Features Guaranteed linearity 0.01% max Improved performance in existing voltage-to-frequency conversion applications Split or single supply operation Operates on single 5V supply Pulse output compatible with all logic forms Excellent temperature stability, g50 ppm/§C max Low power dissipation, 15 mW typical at 5V Wide dynamic range, 100 dB min at 10 kHz full scale frequency Wide range of full scale frequency, 1 Hz to 100 kHz Low cost
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