1 Features
1• Ensured Linearity 0.01% Maximum
• Improved Performance in Existing Voltage-to-
Frequency Conversion Applications
• Split or Single-Supply Operation
• Operates on Single 5-V Supply voltage•
Pulse Output Compatible With All Logic Forms
• Excellent Temperature Stability: ±50 ppm/°C
Maximum
• Low Power Consumption: 15 mW Typical at 5 V
• Wide Dynamic Range, 100 dB Minimum at 10-kHz
Full Scale Frequency
• Wide Range of Full Scale Frequency:
1 Hz to 100 kHz
• Low-Cost

2 Applications
• Voltage to Frequency Conversions
• Frequency to Voltage Conversions
• Remote-Sensor Monitoring
• Tachometers

3 Description
The LMx31 family of 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.