SMR1D/SMR3D
Vishay Foil Resistors
Ultra High Precision Foil Molded Surface Mount Resistor,
TCR of ± 2 ppm/°C and Load Life Stability of ± 0.005%
FEATURES
• TCR:
± 2 ppm/ typical, (see Table 1)
• Load Life Stability (70°C for 2000 hours):
Pb-free
± 0.005%
Available
• Power Rating to 600mW at + 70°C
• Resistance Range: 5Ω to 80KΩ (for higher and lower
values, please contact us)
• Tolerance: to ± 0.01%
• Shelf Life Stability: 0.0025% (25 ppm)
• Low Current Noise: - 40dB “Noise free component”
• Low Voltage Coefficient < 0.1 ppm/V
• Non Inductive: < 0.08 µH
INTRODUCTION
Bulk Metal® Foil (BMF) Technology out-performs all other
resistor technologies available today for applications that
require High Precision and High Stability.
• Thermal EMF: 0.05µV/°C
• Terminal Finishes Available:
Lead (Pb)-Free
This technology has been invented, patented and pioneered
by Vishay. Products based on this technology are the most
suitable for a wide range of appilcations.
Tin/Lead Alloy
• Matched sets with TCR tracking < 2 ppm/°C are
available per request
BMF technology allows to produce customer oriented prod-
ucts designed to satisfy challenging and specific technical
requirements.
• For higher performances please review VSMP Series
and VFCP Series datasheets
The BMF provides inherently a low and predictable Tem-
perature Coefficient of Resistance (TCR) and excellent load
life stability for high precision analog applications.
APPLICATIONS
R2
The SMRxD is a precision molded surface mountable resistor
offering all the elements of precision; including lowest TCR,
tight tolerance, long term stability, low noise, low thermal EMF,
and non-measurable voltage coefficient. It utilizes the Bulk
Metal® Foil technology for the resistive element with its
inherent and legendary low predictable TCR and long term
stability. This surface mountable product affords similar
performance to the time tested S Series molded through-hole
product.
• Precision Amplifliers
R1
• High Precision Instrumentation
• Medical and Test equipment
• Automatic test equipment (ATE)
• Industrial
Vin
-
Vout
+
SMRXD
• Audio (High end stereo equipment)
• EB application
Voltage division with tight tracking < 3 ppm/°C can be
achieved with 2 randomly selected units even with a large
ratio between the two values.
• Military, Airborne and Space
• Pulse application
Our Application Engineering Department is available to
advise and make recommendations for non standard
technical requirements and special applications. Please
contact us.
• Measurement instrumentation
FIGURE 1 - POWER DERATING CURVE
TABLE 1 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE*
–55°C
+70°C
200%
175%
150%
125%
100%
75%
50%
25%
0
TYPICAL TCR AND
MAX. SPREAD
(PPM/°C)
VALUE
(Ω)
STANDARD
TOLERANCE (%)
± 2 ± 3
± 2 ± 4
± 2 ± 6
± 2 ± 8
50Ω to 80KΩ
20Ω to < 50Ω
10Ω to < 20Ω
5Ω to < 10Ω
± 0.01%
± 0.02%
± 0.05%
± 0.10%
* For tighter performances, please contact Vishay Application
Engineering using the e-mail addresses in the footer below.
–50 –25
0
+25 +50 +75 +100 +125 +150 +175 +200
Ambient Temperature (°C)
SALES
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• ISRAEL: foilsales.israel@vishay.com
www.vishay.com
18
For technical questions, contact: foil@vishay.com
Document Number: 63102
Revision 22-Mar-06