VFC320CP ,Voltage-to-Frequency and Frequency-to-Voltage ConverterFEATURESDESCRIPTION* HIGH LINEARITY: 12 to 14 bitsThe VFC320 monolithic voltage-to-frequency and fr ..
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VFC320BG-VFC320BM-VFC320BP-VFC320BPG4-VFC320CG-VFC320CP-VFC320SM
Voltage-to-Frequency and Frequency-to-Voltage Converter
Voltage-to-Frequency
and Frequency-to-Voltage
CONVERTER
FEA TURES 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 CONTROLCommon
fOUT
fIN
VOUT+VCC
–In
+In
–VCC C1
DESCRIPTIONThe VFC320 monolithic voltage-to-frequency and frequency-to-
voltage converter provides a simple low cost method of convert-
ing analog signals into digital pulses. The digital output is an
open collector and the digital pulse train repetition rate is propor-
tional 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 fre-
quency 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 perfor-
mance grades. The VFC320 is specified for the –25°C to +85°C,
range.
VFC320SBVS017A – AUGUST 2001
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
