VFC320

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Voltage-to-frequency and frequency-to-voltage converter with 0.1% linearity error at 1 MHz

Product details

Vs (min) (V) 13 Vs (max) (V) 20 Product type Frequency-to-voltage, Voltage-to-frequency Operating temperature range (°C) -25 to 85 Rating Catalog
Vs (min) (V) 13 Vs (max) (V) 20 Product type Frequency-to-voltage, Voltage-to-frequency Operating temperature range (°C) -25 to 85 Rating Catalog
PDIP (N) 14 181.42 mm² 19.3 x 9.4
  • HIGH LINEARITY: 12 to 14 bits
       ±0.005% max at 10kHz FS
       ±0.03% max at 100kHz FS
       ±0.1% typ at 1MHz FS
  • V/F OR F/V CONVERSION
  • 6-DECADE DYNAMIC RANGE
  • GAIN DRIFT: 20ppm/°C max
  • OUTPUT TTL/CMOS COMPATIBLE
  • APPLICATIONS
    • INEXPENSIVE A/D AND D/A CONVERTER
    • DIGITAL PANEL METERS
    • TWO-WIRE DIGITAL TRANSMISSION WITH NOISE IMMUNITY
    • FM MOD/DEMOD OF TRANSDUCER SIGNALS
    • PRECISION LONG TERM INTEGRATOR
    • HIGH RESOLUTION OPTICAL LINK FOR ISOLATION
    • AC LINE FREQUENCY MONITOR
    • MOTOR SPEED MONITOR AND CONTROL

  • HIGH LINEARITY: 12 to 14 bits
       ±0.005% max at 10kHz FS
       ±0.03% max at 100kHz FS
       ±0.1% typ at 1MHz FS
  • V/F OR F/V CONVERSION
  • 6-DECADE DYNAMIC RANGE
  • GAIN DRIFT: 20ppm/°C max
  • OUTPUT TTL/CMOS COMPATIBLE
  • APPLICATIONS
    • INEXPENSIVE A/D AND D/A CONVERTER
    • DIGITAL PANEL METERS
    • TWO-WIRE DIGITAL TRANSMISSION WITH NOISE IMMUNITY
    • FM MOD/DEMOD OF TRANSDUCER SIGNALS
    • PRECISION LONG TERM INTEGRATOR
    • HIGH RESOLUTION OPTICAL LINK FOR ISOLATION
    • AC LINE FREQUENCY MONITOR
    • MOTOR SPEED MONITOR AND CONTROL

The VFC320 monolithic voltage-to-frequency and frequency-to-voltage converter provides a simple low cost method of converting analog signals into digital pulses. The digital output is an open collector and the digital pulse train repetition rate is proportional to the amplitude of the analog input voltage. Output pulses are compatible with TTL, and CMOS logic families.

High linearity (0.005%, max at 10kHz FS) is achieved with relatively few external components. Two external resistors and two external capacitors are required to operate. Full scale frequency and input voltage are determined by a resistor in series with—In and two capacitors (one-shot timing and input amplifier integration). The other resistor is a non-critical open collector pull-up (fOUT to +VCC). The VFC320 is available in two performance grades. The VFC320 is specified for the –25°C to +85°C, range.

The VFC320 monolithic voltage-to-frequency and frequency-to-voltage converter provides a simple low cost method of converting analog signals into digital pulses. The digital output is an open collector and the digital pulse train repetition rate is proportional to the amplitude of the analog input voltage. Output pulses are compatible with TTL, and CMOS logic families.

High linearity (0.005%, max at 10kHz FS) is achieved with relatively few external components. Two external resistors and two external capacitors are required to operate. Full scale frequency and input voltage are determined by a resistor in series with—In and two capacitors (one-shot timing and input amplifier integration). The other resistor is a non-critical open collector pull-up (fOUT to +VCC). The VFC320 is available in two performance grades. The VFC320 is specified for the –25°C to +85°C, range.

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Type Title Date
* Data sheet VFC320: Voltage-to-Frequency and Frequency-to-Voltage Converter datasheet (Rev. A) 13 Aug 2001
Application note Voltage-to-Frequency Converters Offer Useful Options in A/D Conversion 02 Oct 2000
Application note Frequency-To-Voltage Conversion 27 Sep 2000

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