FEATURES

D HIGH-FREQUENCY OPERATION:

4MHz FS max

D EXCELLENT LINEARITY:

±0.02% typ at 2MHz

D PRECISION 5V REFERENCE

D DISABLE PIN

D LOW JITTER

APPLICATIONS

D INTEGRATING A/D CONVERSION

D PROCESS CONTROL

D VOLTAGE ISOLATION

D VOLTAGE-CONTROLLED OSCILLATOR

D FM TELEMETRY

DESCRIPTION

The

VFC110

voltage-to-frequency

converter

is

a

third-generation VFC offering improved features and

performance. These include higher frequency operation,

an onboard precision 5V reference, and a Disable

function.

The precision 5V reference can be used for offsetting the

VFC transfer function, as well as exciting transducers or

bridges. The Enable pin allows several VFCs’ outputs to

be paralleled, multiplexed, or simply to shut off the VFC.

The

open-collector

frequency

output

is

TTL-/

CMOS-compatible. The output may be isolated by using

an opto-coupler or transformer.

Internal input resistor, one-shot and integrator capacitors

simplify applications circuits. These components are

trimmed for a full-scale output frequency of 4MHz at 10V

input. No additional components are required for many

applications.

The VFC110 is packaged in a plastic 14-pin DIP. Industrial

and military temperature range gradeouts are available.

2

14

Input Common

V

IN

112

I

IN

V

OUT

11

Comparator

O ne− S ho t

V

RE F

− V

S

Analog Ground

413

5V

3

C

OS

6

8

D igital G roun d

f

OUT

10

+V

S

7

E nab le

5

VFC110

SBVS021A − OCTOBER 1988 − REVISED APRIL 2007

High-Frequency

VOLTAGE-TO-FREQUENCY CONVERTER

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.

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Copyright

 1998−2007, Texas Instruments Incorporated

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.

PowerPAD is a trademark of Texas Instruments Incorporated. All other trademarks are the property of their respective owners.