Document Number: 63060

For any questions, contact: foil@vishay.com

www.vishay.com

Revision: 18-Sep-08

1

Ultra High Precision Foil Wraparound Surface Mount Chip Resistor

with TCR of ± 0.05 ppm/°C and Power Coefficient of 5 ppm at

Rated Power and Load Life Stability of ± 0.005 % (50 ppm)

VSMP Series (0805, 1206, 1506, 2010, 2512) (Z-Foil)

Vishay Foil Resistors

Any value at any tolerance within resistance range

INTRODUCTION

VSMP Series is the industry’s first device to provide High

Rated power, Excellent load life stability along with extremely

low TCR all in one resistor.

One of the most important parameters influencing stability is

the Temperature Coefficient of Resistance (TCR). Although

the TCR of foil resistors is considered extremely low, this

characteristic has been further refined over the years. The

The Z-Foil technology provides a significant reduction of the

resistive element's sensitivity to ambient temperature

variations (TCR) and to self heating when power is applied

(power coefficient). Along with the inherently low PCR and

TCR, Z-Foil technology also provides remarkably improved

load life stability, low noise and availability of tight tolerance.

The VSMP has a full wraparound termination which ensures

safe handling during the manufacturing process, as well as

providing stability during multiple thermal cyclings.

Our Application Engineering Department is available to

advise and make recommendations. For non-standard

technical requirements and special applications, please

contact us using the e-mail address in the footer below.

Note

1. For tighter performances, please contact Vishay Application

Engineering using the e-mail addresses in the footer below.

FEATURES

• Temperature coefficient of resistance (TCR):

0.05 ppm/°C typical (0 °C to + 60 °C)

0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.)

• Tolerance: to ± 0.01 %

• Power coefficient “ΔR due to self heating”:

5 ppm at rated power

• Power rating: to 750 mW at + 70 °C

• Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated power

• Resistance range: 10 Ω to 150 kΩ (for higher and lower values,

please contact us)

• Fast thermal stabilization < 1 s

• Electrostatic discharge (ESD) above 25 000 V

• Short time overload: ≤ 0.005 %

• Non inductive, non capacitive design

• Rise time: 1 ns without ringing

• Current noise: - 42 dB

• Voltage coefficient < 0.1 ppm/V

• Non inductive: < 0.08 µH

• Non hot spot design

• Terminal finishes available:

lead (Pb)-free

tin/lead alloy

• Matched sets are available on request

• Any value available within resistance range (e.g. 1K2345)

• Screening per EEE-INST-002 is available for military and space

• Prototype samples available from 48 h. For more information,

please contact foil@vishay.com

APPLICATIONS

• Automatic test equipment (ATE)

• High precision instrumentation

• Laboratory, industrial and medical

• Audio

• EB applications (electron beam scanning and recording

equipment, electron microscopes)

• Military and space

• Satellite

• Commercial aviation

• Airborne

• Down hole instrumentation

• Communication

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

TABLE 1 - TOLERANCE AND TCR VS.

(- 55 °C to + 125 °C, + 25 °C Ref.)

RESISTANCE

VALUE

(

Ω)

TOLERANCE

(%)

TYPICAL TCR AND

MAX. SPREAD

(ppm/°C)

250 to 150K

± 0.01

± 0.2 ± 1.8

100 to < 250

± 0.02

± 0.2 ± 1.8

50 to < 100

± 0.05

± 0.2 ± 2.8

25 to < 50

± 0.1

± 0.2 ± 3.8

10 to < 25

± 0.25

± 0.2 ± 3.8

Top View

FIGURE 1 - POWER DERATING CURVE

Available

Pb-free

RoHS*

COMPLIANT

100

75

50

25

0

- 75

- 50

- 25

0

+ 25

+ 50

+ 75 + 100 + 125 + 150 + 175

Ambient Temperature (°C)

+ 70 °C

- 55 °C