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300144, 300145

Vishay Foil Resistors

Bulk Metal

Foil Technology High Precision Voltage Divider

Resistors with TCR Tracking to 0.5 ppm/°C and

Tolerance Match to 0.005 % (50 ppm)

FEATURES

•

Temperature coefficient of resistance (TCR)

absolute: ± 2 ppm/°C typical

(- 55 °C to + 125 °C, + 25 °C ref.)

TCR tracking: 0.5 ppm/°C

•

Tolerance: absolute and matching to 0.005 %

(50 ppm)

•

Power rating: 0.2 W at 70 °C, for the entire resistive

element R

and R

, divided proportionally between the two

values

•

Load life ratio stability: < 0.005 % (50 ppm) 0.2 W at 70 °C

for 2000 h

•

Maximum working voltage: 200 V

•

Resistance range: 100R to 20K per resistive element

•

Vishay Foil resistors are not restricted to standard

values/ratios; specific “as requested” values/ratios can be

supplied at no extra cost or delivery (e.g. 1K2345 vs. 1K)

•

Electrostatic discharge (ESD) up to 25 000 V

•

Non-inductive, non-capacitive design

•

Rise time: 1 ns effectively no ringing

•

Thermal stabilization time < 1 s (nominal value achieved

within 10 ppm of steady state value)

•

Current noise: 0.010 µV

RMS

/V of applied voltage (< - 40 dB)

•

Thermal EMF: 0.05 µV/°C typical

•

Voltage coefficient: < 0.1 ppm/V

•

Non inductive: < 0.08 µH

•

Non hot spot design

•

Terminal finish: lead (Pb)-free or tin/lead alloy

•

Compliant to RoHS directive 2002/95/EC

•

Prototype quantities available in just 5 working days

or sooner. For more information, please contact

foil@vishaypg.com

•

For better performances see 300144Z, 300145Z (Z-Foil)

datasheet

INTRODUCTION

Why tight tolerance is important?

Why do users employ tight tolerance resistors? A system or

a device or one particular circuit element must perform for a

specified period of time and at the end of that service period

it must still be performing within specifications.

During its useful life it may have been subjected to some

hostile service conditions and it is no longer within purchased

tolerance.

What is ratio?

The ratio tolerances available in a divider are variable and

dependent on resistor technology. Bulk Metal

foil provides

the tightest ratio tolerance available.

The tight resolution capability and overall stability of foil

resistors permit adjustment within the divider to ratio not

available with other technologies. Ratios in network form, in

a common package have a better chance of holding tight

tolerances than those formed in a discrete matched set by

sorting.

Molded foil 300144, 300145 resistors can be provided in a

tolerance as tight as 0.005 %. Theoretically, ratios such as

these can be made initially with other resistor technologies.

However, less stable products will not hold these tight ratios

tolerances over time and applied stresses like voltage and

temperature.

Vishay Bulk Metal foil dividers/networks 300144, 300145

hold their ratio tolerances under defined circumstances.

Networks with tight ratio tolerances and controlled tracking

extend the useful life of equipment, whether expressed as

mean-time-between-failures (MTBF) or service periods to

recalibration or end-of-life-cycle.

How to avoid thermal EMF?

When the resistor’s terminals and the resistive element are

made of dissimilar metals and two junctions are at a different

temperature, a voltage is produced which is called “thermal

EMF”.

The level of voltage output is a function of the metals

involved and the differential temperature. The voltage

produced is either positive or negative depending on which

junction is considered as a reference point. Virtually all

resistive products have these metallic junctions. It is

presumed they will eventually be terminated to copper as a

final metallic combination and therefore copper is used as a

typical reference material.

300144, 300145 have the lowest thermal EMF’s because all

junctions have low microvolts outputs. Moreover,

construction of the resistive element is such that the input

and output junctions of the resistor are so close that the

temperature gradients between then is highly unlikely. These

design factors produce a divider with very low thermal EMF.

Our application engineering department is available to

advise and make recommendations. For non-standard

technical requirements and special applications. Please

APPLICATIONS

•

Instrumentation amplifiers

Bridge networks

Differential amplifiers

Military

Space

Medical

Automatic test equipment

Down-hole (high temperature)

out

300144

300145

* Pb containing terminations are not RoHS compliant, exemptions may apply

Document Number: 63045

Revision: 23-Mar-10

For any questions, contact:

foil@vishaypg.com

www.foilresistors.com

300144, 300145

Vishay Foil Resistors

TABLE 1A - MODELS 300144 AND 300145

SPECIFICATIONS

RESISTANCE

VALUES

≥

500

to 20 kΩ

100

to < 500

ABSOLUTE

TOLERANCE

ABSOLUTE TCR

(- 55 °C to + 125 °C,

+ 25 °C ref.)

TYPICAL AND MAX.

SPREAD

± 2 ppm/°C ± 3 ppm/°C

TABLE 1B - MODELS 300144 AND 300145

SPECIFICATIONS

RESISTANCE

RATIO

1:1

> 1:1 to 4:1

> 4:1 to 10:1

> 10:1

TOLERANCE

MATCH

0.005 %

0.01 %

TCR TRACKING MAX.

0.5 ppm/°C

1.0 ppm/°C

1.5 ppm/°C

2.0 ppm/°C

± 0.005 %

± 0.01 %

Note

• See table 3 for additional established ratios

FIGURE 1 - TRIMMING TO VALUES

(conceptual illustration)

Interloop

Capacitance

Reduction

in Series

Mutual

Inductance

Reduction due

to Opposing

Current in

Adjacent Lines

Current Path

Before Trimming

Current Path

After Trimming

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing Resistance

Note:

Foil shown in

black,

etched spaces in

white

FIGURE 2 - STANDARD PRINTING AND DIMENSIONS

in inches (millimeters)

Model 300144 and Schematic

(2)

0.295

(7.49)

VISHAY

9825

300144

0.1

(2.54)

Match

Tolerance

10K000

0.01

10K000

Model 300145 and Schematic

(2)(3)

0.375

(9.53)

0.2

(5.08)

Date Code

Model No.

0.015 ± 0.005

(0.38 ± 0.13)

0.025 ± 0.005

(0.64 ± 0.13)

0.320

(8.13)

Low

Resistance

Value

Indicator

Date Code

Model No.

VISHAY

0730

300145

0.375

(9.53)

10K000

0.01

10K000

0.75

(1)

(19.05)

0.015 ± 0.005

(0.38 ± 0.13)

0.75

(1)

(19.05)

Match

Tolerance

Dimensional Tolerance: ± 0.010" (0.25)

0.1 (2.54)

(1)

0.025 ± 0.005

(0.64 ± 0.13)

(2)

(3)

Lead wires: #22 AWG solder coated copper,

0.75" minimum length

Each divider pair consists of two resistors on one

single chip

For model 300145 the 2 chips are independent

and with no special relationship from chip to chip

0.1 (2.54)

www.foilresistors.com

For any questions, contact:

foil@vishaypg.com

Document Number: 63045

Revision: 23-Mar-10

300144, 300145

Vishay Foil Resistors

FIGURE 3 - POWER DERATING CURVE

300144, 300145

100

FIGURE 4 - TYPICAL RESISTANCE/

TEMPERATURE CURVE

+ 150

+ 100

- 55 °C

+ 70 °C

Rated Power

Percent of Rated Power at + 70 °C

+ 50

(ppm)

Recommended

operation for

< 150 ppm

ΔR

after 2000 h

load life

- 50

- 100

- 150

- 200

- 55 - 50

- 25

+ 25

+ 50

+ 75

+ 100

2 ppm/

+ 125

- 75

Ambient Temperature (°C)

- 50

- 25

+ 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200

Ambient Temperature (°C)

Note:

Power is divided proportionally between the 2 values

TABLE 2 - GLOBAL PART NUMBER INFORMATION

(1)

NEW GLOBAL PART NUMBER: Y0006V0058QT9L (preferred part number format)

DENOTES PRECISION

VCODE

RESISTANCE

VALUE CODE

TOLERANCE MATCH

= 0.005 %

= 0.01 %

= 0.02 %

= 0.05 %

= 0.1 %

= 0.5 %

= 1.0 %

PACKAGING

= bulk pack

RESISTANCE TOLERANCE

= ± 0.005 %

= ± 0.01 %

= ± 0.02 %

= ± 0.05 %

= ± 0.1 %

= ± 0.5 %

= ± 1.0 %

FOR EXAMPLE: ABOVE GLOBAL ORDER Y0006 V0058 Q T 9 L:

TYPE: 300144

VALUES: 2K/20K

ABSOLUTE TOLERANCE: ± 0.02 %

TOLERANCE MATCH: 0.01 %

TERMINATION: lead (Pb)-free

PACKAGING: bulk pack

HISTORICAL PART NUMBER: 300144T 2K/20K TCR2 Q T B (will continue to be used)

300144

MODEL

300144

300145

TERMINATION

= lead (Pb)-free

None

= tin/lead alloy

2K/20K

OHMIC VALUE

= 2 kΩ

= 20 kΩ

(2)

TCR2

TCR

CHARACTERISTIC

ABSOLUTE

TOLERANCE

= ± 0.005 %

= ± 0.01 %

= ± 0.02 %

= ± 0.05 %

= ± 0.1 %

= ± 0.5 %

= ± 1.0 %

PRODUCT CODE

0006

= 300144

0035

= 300145

CHARACTERISTICS

= standard

= lead (Pb)-free

1 to 999

= custom

TOLERANCE

MATCH

= 0.005 %

= 0.01 %

= 0.02 %

= 0.05 %

= 0.1 %

= 0.5 %

= 1.0 %

PACKAGING

= bulk pack

Notes

(1)

For non-standard requests, please contact application engineering

(2)

For 300145 please specify the resistance value for each resistor even if all values are equal

Document Number: 63045

Revision: 23-Mar-10

For any questions, contact:

foil@vishaypg.com

www.foilresistors.com

300144, 300145

Vishay Foil Resistors

TABLE 3 - EXAMPLES OF VCODES FOR POPULAR VALUES

(other values available on request)

300144 RATIOS

VCODES

V0009

V0010

V0100

V0055

V0223

V0097

V0001

V0042

V0006

V0166

V0226

V0003

V0013

V0107

V0014

V0160

V0159

V0005

V0002

V0373

V0026

V0156

V0158

20K

19K4

17K5

15K

10K

5K5

2K7

20K

10K

9K7

20K

15K

10K

8K323

15K

10K

16K

20K

7K7

10K

12K

19K2

10K

VCODES

V0058

V0030

V0029

V0059

V0103

V0154

V0032

V0121

V0004

V0379

V0374

V0022

V0091

V0162

V0378

V0061

V0088

V0380

V0375

V0381

V0377

V0376

1K5

800R

511R

500R

300R

100R

50R

35R

20K

18K

16K

800R

16K2

500R

15K

4K5

300R

100R

15K

12K3

50R

28K

20K

VCODES

V0008

V0019

V0092

V0023

V0047

V0051

V0227

10K

500R

100R

350R

300145 RATIOS

10K

7K812

500R

8K8

10K

350R

10K

7K812

500R

100R

350R

10K

500R

8K8

10K

350R

Note

• A combination of these values are available in reverse order and in values up to 5 digits

www.foilresistors.com

For any questions, contact:

foil@vishaypg.com

Document Number: 63045

Revision: 23-Mar-10

Legal Disclaimer Notice

Vishay Precision Group

Disclaimer

ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their

behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or

incompleteness contained herein or in any other disclosure relating to any product.

The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and

conditions of purchase, including but not limited to, the warranty expressed therein.

Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms

and conditions of purchase.

To the maximum extent permitted by applicable law, Vishay Precision

Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and

all liability, including without limitation special, consequential or incidental damages, and (iii) any and

all implied warranties, including warranties of fitness for particular purpose, non-infringement and

merchantability.

Information provided in datasheets and/or specifications may vary from actual results in different

applications and performance may vary over time. Statements regarding the suitability of products for

certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that

are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a

particular product with the properties described in the product specification is suitable for use in a particular

application.

No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or

by any conduct of Vishay Precision Group.

The products shown herein are not designed for use in life-saving or life-sustaining applications unless

otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly

indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay

Precision Group for any damages arising or resulting from such use or sale. Please contact authorized

Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for

such applications.

Product names and markings noted herein may be trademarks of their respective owners.

Document No.: 63999

Revision: 27-Apr-2011

www.vishaypg.com