SMR1D/SMR3D
Vishay Foil Resistors
High Precision Bulk Metal® Foil Molded Surface Mount Resistor
with TCR down to ꢀ ꢁꢁp/ꢂC, Flexible Terpinations,
and Load Life Stability of ꢃ0ꢃꢃꢄ ꢅ (ꢄꢃ ꢁꢁp)
FEATURES
• Temperature coefficient of resistance (TCR):
2 ppm°C typical (- 55 °C to + 125 °C,
Pb-free
+ 25 °C ref.)
Available
• Tolerance: to 0.01 %
RoHS*
• Flexible terminations ensure minimal stress
transference from the PCB due to a difference
in thermal coefficient of expansions (TCE)
COMPLIANT
Any value at any tolerance available within resistance range
• Electrostatic discharge (ESD) above 25 000 V
• Load life stability: 0.005 % (70 °C, 2000 h at rated power)
INTRODUCTION
The SMRxD is a precision molded surface mountable
resistor offering all the elements of precision; including low
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 low and predictable TCR and long
term stability. This surface mountable product affords similar
performance to the time tested S series molded through-hole
product.
• Resistance range: 5 Ω to 80 kΩ (for higher and lower
values, please contact us)
• Power rating: to 600 mW at 70 °C
• Non inductive, non capacitive design
• Current noise: - 40 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
The flexible terpinations of this ꢁroduct also reduce
stress transference frop the PCB to the resistor0
• Matched sets with TCR tracking are available upon request
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 h. For more
information, please contact foil@vishay.com
Voltage division with tight tracking < 3 ppm/°C can be
achieved with 2 randoply selected units even with a large
ratio between the two values.
•
For better performances please review SMRxDZ datasheet
Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
APPLICATIONS
• Military, airborne and space
• Precision amplifiers
• High precision instrumentation
• Medical
• Automatic test equipment (ATE)
• Industrial
• Audio (high end stereo
equipment)
• EB application
• Pulse application
TABLE 1 - THE SMRxD SERIES IS LISTED
IN THE FOLLOWING DSCC
SPECIFICATIONS
R2
R1
Vin
-
MODEL
SMR1D
SMR3D
DSCC
06020
06021
MIL SPEC
Vout
+
MIL-PRF-55182
MIL-PRF-55182
SMRxD
• Measurement instrumentation
TABLE 2 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE
FIGURE 1 - POWER DERATING CURVE
- 55 °C
+ 70 °C
(- 55 °C to + 125 °C, + 25 °C Ref.)
200
175
150
125
100
75
TYPICAL TCR AND
STANDARD
VALUE
MAX0 SPREAD1)
(ꢁꢁp/ꢂC)
TOLERANCE1)
50 Ω to 80 kΩ
20 Ω to < 50 Ω
10 Ω to < 20 Ω
5 Ω to < 10 Ω
0.01 %
0.02 %
0.05 %
0.1 %
2
2
2
2
3
4
6
8
50
25
0
Note
1. Tighter performances are available
- 75
- 25
+ 25
+ 75
+ 125
+ 175
Apbient Tepꢁerature (ꢂC)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63102
Revision: 14-Nov-07
For any questions, contact: foil@vishay.com
www.vishay.com
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