VCS1625

Vishay Foil Resistors

High Precision Foil Surface Mount Current Sensing Chip

Resistors with TCR of ± 2 ppm/°C and Load Life Stability of ± 0.02 %

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63023

1

Revision: 19-Feb-08

Any value at any tolerance available within resistance range

INTRODUCTION

Model VCS1625 is a surface mount resistor designed with

foil as the resistance element, it provides performance

capabilities far greater than other resistor technologies can

supply in a product of comparable size.

This small device dissipates heat almost entirely through the

pads so surface mount users are encouraged to be generous

with the board’s pads and traces. Gold terminations are

available on special order.

Our application engineering department is available to

advise and to make recommendations. For non standard

technical requirements and special applications, please

contact us.

Note:

1. Power rating at + 70 °C

1 W on alumina substrate

0.5 W on FR4

FEATURES

• Temperature coefficient of resistance (TCR):

± 2.0 ppm/°C typical (- 55 °C to + 125 °C,

+ 25 °C ref.) (see table 1)

• Tolerance: to ± 0.1 %

• Load life stability:

± 0.02 % at 70 °C, 2000 h at rated power

• Electrostatic discharge (ESD) above 25 000 V

• Short time overload ≤ 0.005 %

• Ohmic values: 0.01 Ω to 10 Ω (for higher or lower values

please contact us)

• Non inductive, non capacitive design

• Power rating: 1 W at + 70 °C (figure 1)

• Current rating: 5 A maximum

• Thermal EMF: 0.05 µV/°C typical

• Non hot spot design

• Current noise: < - 40 dB

• Rise time: 1 ns without ringing

• Voltage coefficient: < 0.1 ppm/V

• Non inductive: < 0.08 µH

• For better performances please review VCS1625Z (Z-foil)

data sheet

TERMINATIONS

• Two lead (Pb)-free options are available:

gold plated or tin plated

• Tin/lead plated

APPLICATIONS

• Automatic test equipment (ATE)

• Airborne (in heads-up display systems)

• High precision instrumentation

• Electron beam recording equipment

• Electron microscopes

• Current sensing applications

• Forced balance electronic scales

• Applications that require superior frequency stability

• Military

• Medical

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

100

75

50

25

0

- 75

- 50

- 25

0

+ 25

+ 50

+ 75 + 100 + 125 + 150 + 175

Ambient Temperature (°C)

+ 70 °C

- 55 °C

Available

Pb-free

RoHS*

COMPLIANT

I

1

E

1

E

2

Electrical

Schematic

R

TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (- 55 °C to + 125 °C, + 25° Ref.)

VALUE (

Ω)

TOLERANCE

TYPICAL TCR

MAXIMUM TCR

> 2R000 to 10R000

0.2 %, 0.5 %, 1 %

± 2 ppm/°C

± 5 ppm/°C

> 0R500 to 2R000

0.5 %, 1 %

± 2 ppm/°C

± 10 ppm/°C

> 0R100 to 0R500

1 %

± 2 ppm/°C

± 15 ppm/°C

> 0R050 to 0R100

1 %

± 2 ppm/°C

± 20 ppm/°C

> 0R030 to 0R050

1 %

± 2 ppm/°C

± 30 ppm/°C

> 0R010 to 0R030

1 %

± 2 ppm/°C

± 50 ppm/°C