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.