LM331

www.fairchildsemi.com LM331 V-F Converter Features Guaranteed linearity: 0.01% max. Low power dissipation: 15mW at 5V Wide range of full scale frequency: 1Hz to 100KHz Pulse output compatible with all logic forms Wide dynamic range: 100dB min at 10KHz full scale frequency Description This voltage to frequency converter provides the output pulse train at a frequency precisely proportional to the applied input voltage. The LM331 can operate at power supplies as low as 4.0V and be changed output frequency from 1Hz to 100KHz. It is ideally suited for use in simple low cost circuit for analog-to digital conversion, long term integration, linear frequency modulation or demodulation, frequency to voltage conversion, and many other functions. 8-DIP 1 Internal Block Diagram Rev. 1.0.0 ©2001 Fairchild Semiconductor Corporation LM331 Absolute Maximum Ratings (TA = 25°C) Parameter Supply Voltage Input Voltage Operating Temperature Range Power Dissipation Symbol VCC VI TOPR PD Value 40 -0.2 ~ + VCC 0 ~ +70 500 Unit V V °C mW Electrical Characteristics Parameter VFC Non-Linearity Conversion Accuracy Scale Factor Chang Of Gain With VCC Rated Full - Scale Frequency INPUT COMPARATOR Offset Voltage Bias Current Offset Current Common-Mode Range TIMER (PIN 5) Timer Threshold Voltage Input Bias Current VTH IBIAS VCC = 15V, 0V ≤ V5 ≤ 9.9V V5 = 10V Saturation Voltage CURRENT SOURCE (PIN 1) Output Current Change with Voltage Current Source Off Leakage REFERENCE VOLTAGE (PIN 2) Re...