Burr Brown VFC110BG, VFC110SG, VFC110AG Datasheet

®

VFC110

High-Frequency

VOLTAGE-TO-FREQUENCY CONVERTER

FEATURES

● HIGH-FREQUENCY OPERATION:

4MHz FS max

● EXCELLENT LINEARITY:

±0.02% typ at 2MHz

● PRECISION 5V REFERENCE

● DISABLE PIN

● LOW JITTER

DESCRIPTION

The VFC110 voltage-to-frequency converter is a third­generation VFC offering improved features and per­formance. These include higher frequency operation,
an on-board 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

I

IN

112

V

OUT

Comparator

11

APPLICATIONS

● INTEGRATING A/D CONVERSION

● PROCESS CONTROL

● VOLTAGE ISOLATION

● VOLTAGE-CONTROLLED OSCILLATOR

● FM TELEMETRY

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 plastic and ceramic
14-pin DIPs. Industrial and military temperature range
gradeouts are available.

+V

S

10

f

8

OUT

V

2

Input Common

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

© 1988 Burr-Brown Corporation PDS-861B Printed in U.S.A. October, 1993

IN

14

V

REF

413

–V

S

Analog Ground

PDS-861B

3

5V

One-Shot

6

C

OS

Digital Ground

7

Enable

5

SPECIFICATIONS

At TA = +25°C and VS = ±15V, unless otherwise noted.

VFC110BG VFC110AG/SG/AP
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
VOLTAGE-TO-FREQUENCY OPERATION

Nonlinearity

Gain Error, f = 1MHz C
Gain Drift, f = 1MHz Specified Temp Range 50 100 ppm/°C

PSRR V

INPUT

Full Scale Input Current 250 500 * * µA
I

B

I

B

V

OS

V

OS

INTEGRATOR AMPLIFIER OUTPUT

Output Voltage Range R
Output Current Drive 5 20 * * mA
Capacitive Load No Oscillations 10 10 nF

COMPARATOR INPUT

I

B

Trigger Voltage ±50 * mV
Input Voltage Range –5 +V

OPEN COLLECTOR OUTPUT

V

O

I

LEAKAGE

Fall Time 25 * ns
Delay to Rise 25 * ns
Settling Time To Specified Linearity for a One Pulse of New Frequency Plus 1µs

REFERENCE VOLTAGE

Voltage 4.97 5 5.03 * * * V
Voltage Drift 20 50 ppm/°C
Load Regulation I
PSRR V
Current Limit Short Circuit 15 20 * mA

ENABLE INPUT

V

HIGH

V

LOW (fOUT

I

HIGH

I

LOW

POWER SUPPLY

Voltage, ±V
Current 13 16 * * mA

TEMPERATURE RANGE

Specified

Storage

* Same specifications as VFC110BG.
NOTE: (1) Nonlinearity measured from 1V to 10V input.

(1)

: f

= 100kHz COS = 2.2nF, RIN = 44kΩ 0.005 0.01 0.01 0.05 %FS

FS

f

= 1MHz COS = 150pF, RIN = 40kΩ 0.01 0.05 0.1 %FS

FS

f

= 2MHz COS = 56pF, RIN = 34kΩ 0.02 * %FS

FS

f

= 4MHz COS = (Int), RIN = (Int) 1 * %FS

Relative to V

FS

REF

= 150pF, RIN = 40kΩ 5*%

OS

Specified Temp Range 50 100 ppm/°C

= ±8V to ±18V 0.05 0.1 %/V

S

– (Inverting Input) 15 60 20 100 nA
+ (Non-Inverting Input) 250 * nA

33mV

Drift Specified Temp Range 35 * µV/°C

= 2kΩ –0.2 +VS – 4 * * V

L

(Input Bias Current) –5 * µA

S

**V

Low 0.4 * V

0.1 1 * * µA

Full-Scale Input Step

= 0 to 10mA 2 10 * * mV

O

= ±8V to ±18V 5 * mV/V

S

(f

Enabled) Specified Temp Range 2 * V

OUT

Disabled) Specified Temp Range 0.4 * V

0.1 * µA
1*µA

S

±8 ±15 ±18 * * * V

AG, BG, AP –25 +85 * * °C
SG –55 +125 °C

AG, BG, SG –65 +150 * * °C
AP –40 +125 * * °C

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

®

VFC110

2

PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS

Top View DIP

V

+5V

Out

REF

–V

Enable

C

Digital Ground

1

I

IN

2

IN

3
4

S

5
6

OS

7

14

Input Common

13

Analog Common

12

V

OUT

11

Comparator In

10

+V

S

9

NC

8

f

OUT

Power Supply Voltages (+V
f

Sink Current............................................................................50mA

OUT

Comparator In Voltage .......................................................... –5V to +V

Enable Input........................................................................... +VS to –V

Integrator Common-Mode Voltage.................................. –1.5V to +1.5V

Integrator Differential Input Voltage ................................ +0.5V to –0.5V

Integrator Out (short-circuit)..................................................... Indefinite

V

Out (short-circuit)..............................................................Indefinite

REF

Operating Temperature Range

G Package ................................................................ –55°C to +125°C

P Package................................................................... –40°C to +85°C

Storage Temperature

G Package ................................................................ –60°C to +150°C

P Package................................................................. –40°C to +125°C

Lead Temperature (soldering, 10s)............................................. +300°C

to –VS) ................................................40V

S

PACKAGE INFORMATION

PRODUCT PACKAGE NUMBER

PACKAGE DRAWING

VFC110AG 14-Pin Ceramic DIP 169
VFC110BG 14-Pin Ceramic DIP 169
VFC110SG 14-Pin Ceramic DIP 169
VFC110AP 14-Pin Plastic DIP 010

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.

(1)

ORDERING INFORMATION

S
S

PRODUCT PACKAGE RANGE

TEMPERATURE

VFC110AG Ceramic DIP –25°C to +85°C
VFC110BG Ceramic DIP –25°C to +85°C
VFC110SG Ceramic DIP –55 °C to +125°C
VFC110AP Plastic DIP –25°C to +85°C

®

3

VFC110