High Precision Foil Resistor with TCR of ± 2.0 ppm/°C,
Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %
Document Number: 63001 For any questions, contact: foil@vishay.com www.vishay.com
Revision: 25-Jun-09 1
S Series
Vishay Foil Resistors
INTRODUCTION
Bulk Metal® Foil (BMF) technology outperforms all other
resistor technologies available today for applications that
require high precision and high stability.
This technology has been pioneered and developed by
VISHAY, and products based on this technology are the
most suitable for a wide range of applications. BMF
technology allows us to produce customer orientated
products, designed to satisfy challenging and specific
technical requirements.
Model S series made from Vishay BMF offers low TCR,
excellent load life stability, tight tolerance, fast response
time, low current noise, low thermal EMF and low voltage
coefficient, all in one resistor.
The S series is virtually insensitive to destabillizing factors.
The resistor element is a solid alloy that displays the
desirable bulk properties of its parent material, thus it is
inherently stable and noise free.
Vishay’s Bulk Metal® S series resistors are the modern
generation of precision resistors. The standard design of
these resistors provides a unique combination of
characteristics found in no other single resistor.
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
FEATURES
•
Temperature coefficient of resistance (TCR):
- 55 °C to + 125 °C, 25 °C ref.
- S102C series: ± 2 ppm/°C typical (see table 1)
- S102K series: ± 1 ppm/°C typical (see table 1)
•
Rated power: to 1 W at + 125 °C
•
Tolerance: ± 0.005 % (50 ppm)
•
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated
power
•
Resistance range: 0.5
Ω
to 1 M
Ω
(higher or lower values of
resistance are available)
•Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
•Electrostatic discharge up to 25 000 V
•
Non inductive, non capacitive design
•Rise time: 1 ns effectively no ringing
•
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
•
Low inductance: < 0.08 µH typical
•
Non hot spot design
•Terminal finish: lead (Pb)-free or tin/lead alloy
•
Matched sets are available per request
(TCR tracking: to 0.5 ppm/°C)
•Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishay.com
•For better TCR and PCR performances please review the
Z201 datasheet
APPLICATIONS
•High precision amplifiers
•Down-hole (high temperature)
•High precision instrumentation
•Medical and test equipment
•Industrial
•Audio (high end stereo equipment)
•EB applications (electron beam scanning and recording
equipment, electron microscopes)
•Military, airborne
•Measurement instrumentation
* Pb containing terminations are not RoHS compliant, exemptions may apply
TABLE 1 - RESISTANCE VERSUS TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
RESISTOR RESISTANCE
VALUE (Ω)
TYPICAL TCR AND
MAX SPREAD
(ppm/°C)
S102(C) 80 to < 150K ± 2 ± 2.5
S102(K) 80 to < 100K ± 1 ± 2.5
S102(C) 50 to < 80 ± 2 ± 3.5
S102(K) ± 1 ± 3.5
S102(C) 1 to < 50 ± 2 ± 4.5
S102(K) ± 1 ± 4.5
FIGURE 1 - FOIL RESISTOR TCR COMPARISON OF
FOIL ALLOYS IN MILITARY RANGE
- 50 - 25 0 + 25 + 50 + 75 + 100 + 125
- 55
C Alloy
2 ppm/°C
K Alloy
1 ppm/°C
1 ppm/°C
2 ppm/°C
+ 150
+ 100
+ 50
0
- 50
- 100
- 150
- 200
ΔR
R
(ppm)
Temperature (°C)