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VFC121

Features: ·SINGLE SUPPLY OPERATION:+4.5V to +36V·fO = 1.5MHz max·LOW NONLINEARITY: 0.03% max at 100kHz, 0.1% max at 1MHz·HIGH INPUT IMPEDANCE·VOLTAGE REFERENCE OUTPUT·THERMOMETER OUTPUT: 1mV/°KApplication·INTEGRATING A/D CONVERSION·ANALOG SIGNAL TRANSMISSION·PHASE-LOCKED LOOP VCO·GALVANICALLY ISOL...

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SeekIC No. : 004541241 Detail

VFC121: Features: ·SINGLE SUPPLY OPERATION:+4.5V to +36V·fO = 1.5MHz max·LOW NONLINEARITY: 0.03% max at 100kHz, 0.1% max at 1MHz·HIGH INPUT IMPEDANCE·VOLTAGE REFERENCE OUTPUT·THERMOMETER OUTPUT: 1mV/°KAppli...

VFC121 Data Sheet

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Part Number:
VFC121
Supply Ability:
5000

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  • 1~5000
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  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

·SINGLE SUPPLY OPERATION:+4.5V to +36V
·fO = 1.5MHz max
·LOW NONLINEARITY: 0.03% max at 100kHz, 0.1% max at 1MHz
·HIGH INPUT IMPEDANCE
·VOLTAGE REFERENCE OUTPUT
·THERMOMETER OUTPUT: 1mV/°K


Application

·INTEGRATING A/D CONVERSION
·ANALOG SIGNAL TRANSMISSION
·PHASE-LOCKED LOOP VCO
·GALVANICALLY ISOLATED SYSTEMS


Pinout

Connection Diagram


Specifications

Power Supply Voltage (+VS) ................................................................ 40V
fOUT Sink Current .............................................................................. 20mA
Comparator In Voltage ......................................................... 0.5V to +3V
Enable Input ......................................................................... 0.3V to +VS
Integrator Common-Mode Voltage .................................... 0V to +VS 2V
Integrator Differential Input Voltage ................................. 0.3V to +0.3V
VREF Out (short-circuit) ............................................................... Indefinite
Operating Temperature Range ...................................... 40°C to +85°C
Storage Temperature .................................................. 40°C to +125°C
Lead Temperature (soldering, 10s) ............................................... +300°C


Description

The VFC121 is a monolithic voltage-to-frequency converter consisting of an integrating amplifier, voltage reference, and one-shot charge pump circuitry. High-frequency complementary NPN/PNP circuitry is used to implement the charge-balance technique,achieving speed and accuracy far superior to previous
single power supply VFCs.

The high-impedance input of VFC121 accepts signals from ground potential to VS 2.5V. Power supplies from 4.5V to 36V may be used. A 2.6V reference voltage output may be used to excite sensors or bias external circuitry.A thermometer output voltage proportional to absolute temperature (°K) may be used as a temperature sensor or for temperature compensation of applications circuits.

Frequency output of VFC121 is an open-collector transistor. A disable pin forces the output to the high impedance state, allowing multiple VFCs to share a common transmission path.




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