IC V-TO-F /F-TO-V CONV TO-100

 

VFC320BM

Manufacturer Part NumberVFC320BM
DescriptionIC V-TO-F /F-TO-V CONV TO-100
ManufacturerTexas Instruments
VFC320BM datasheets

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Specifications of VFC320BM

Mounting TypeThrough HolePackage / CaseTO-100-10 Metal Can
Converter FunctionVFC/FVCFull Scale Frequency1000
Power Supply RequirementDualSingle Supply Voltage (typ)Not RequiredV
Single Supply Voltage (max)Not RequiredVSingle Supply Voltage (min)Not RequiredV
Dual Supply Voltage (typ)±15VDual Supply Voltage (min)±13V
Dual Supply Voltage (max)±20VOperating Temperature (min)-25C
Operating Temperature (max)85COperating Temperature ClassificationCommercial
Package TypeTO-100Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
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Voltage-to-Frequency
and Frequency-to-Voltage
FEATURES
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
+V
CC
–In
+In
–V
CC
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
CONVERTER
DESCRIPTION
The 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 (f
to +V
OUT
mance grades. The VFC320 is specified for the –25 C to +85 C,
range.
V
f
OUT
IN
Flip-
Comparators
–7.5V Ref
One-shot
C
1
www.ti.com
VFC320
SBVS017A – AUGUST 2001
). The VFC320 is available in two perfor-
CC
f
OUT
flop
Common
Copyright © 1982, Texas Instruments Incorporated

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VFC320BM Summary of contents

  • Page 1

    ... CC Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty ...

  • Page 2

    ELECTRICAL CHARACTERISTICS +25 C and 15VDC power supply, unless otherwise noted. A PARAMETER V/F CONVERTER /7 Figure 4 OUT INPUT TO OP AMP (1) Voltage Range Fig. 4 ...

  • Page 3

    ABSOLUTE MAXIMUM RATINGS Supply Voltage ................................................................................... 20V Output Sink Current at f ............................................................... 50mA OUT Output Current at V ................................................................... +20mA OUT Input Voltage, –Input .......................................................................... V Input Voltage, +Input .......................................................................... V Storage Temperature Range .......................................... – +150 ...

  • Page 4

    DISCUSSION OF SPECIFICATIONS LINEARITY Linearity is the maximum deviation of the actual transfer function from a straight line drawn between the end points (100% full scale input or frequency and 0.1% of full scale called zero.) Linearity is the most ...

  • Page 5

    C 2 Integrating Input Resistor Capacitor Current Sinks Switch V IN: For Postive Input Voltages use e For Negative Input Voltages use e For Differental Input Voltages use ...

  • Page 6

    The operation of the VFC320 as a highly linear frequency- to-voltage converter, follows the same theory of operation as the voltage-to-frequency converter. e and disconnected from then driven with a IN OUT ...

  • Page 7

    Hz. The FS temperature drift critical since it will add directly to 1 the errors of the transfer function. An NPO ceramic type is recommended. Every effort should ...

  • Page 8

    Selecting /(8mA – PULLUP LOAD =5V/(8mA – 1.6mA), one TTL-load = 1.6mA =781 Choose a 750 1/4-watt carbon compensation resistor with 5% tolerance. FREQUENCY-TO-VOLTAGE CONVERSION To operate the VFC320 as a frequency-to-voltage ...

  • Page 9

    V IN VFC320 Transducer INA101 0.005% Linearity Precision DC Instrumentation levels down to Amp 10mV full scale FIGURE 12. Remote Transducer Readout via Fiber Optic Link (Analog and Digital Output). Gain Adjust 0.01µF +10V to –10V 30k Input +15V 8 ...

  • Page 10

    PACKAGE DRAWING N (R-PDIP-T**) 16 PINS SHOWN 0.070 (1,78) MAX 0.035 (0,89) MAX 0.020 (0,51) MIN 0.100 (2,54) 0.021 (0,53) 0.010 (0,25) 0.015 (0,38) NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is ...

  • Page 11

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...

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