1 Features

• 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
• 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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Schematic Diagram