SMR1D_07 Datasheet, PDF (1/5 Pages) Vishay Siliconix – High Precision Bulk Metal® Foil Molded Surface Mount Resistor

SMR1D/SMR3D
Vishay Foil Resistors
High Precision Bulk Metal^® Foil Molded Surface Mount Resistor
with TCR down to ± 2 ppm/°C, Flexible Terminations,
and Load Life Stability of ± 0.005 % (50 ppm)
Any value at any tolerance available within resistance range
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.
The flexible terminations of this product also reduce
stress transference from the PCB to the resistor.
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.
Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
TABLE 1 - THE SMRxD SERIES IS LISTED
IN THE FOLLOWING DSCC
SPECIFICATIONS
MODEL
DSCC
MIL SPEC
SMR1D
06020
MIL-PRF-55182
SMR3D
06021
MIL-PRF-55182
FEATURES
• Temperature coefficient of resistance (TCR):
± 2 ppm°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
Pb-free
Available
• Tolerance: to ± 0.01 %
• Flexible terminations ensure minimal stress
transference from the PCB due to a difference
in thermal coefficient of expansions (TCE)
RoHS*
COMPLIANT
• Electrostatic discharge (ESD) above 25 000 V
• Load life stability: ± 0.005 % (70 °C, 2000 h at rated power)
• 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
• 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 [e-mail]
• For better performances please review SMRxDZ datasheet
APPLICATIONS
• Military, airborne and space
• Precision amplifiers
• High precision instrumentation
• Medical
• Automatic test equipment (ATE)
R₂
• Industrial
• Audio (high end stereo
equipment)
• EB application
R₁
V_in
-
+
• Pulse application
• Measurement instrumentation
V_out
SMRxD
TABLE 2 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25 °C Ref.)
VALUE
STANDARD
TOLERANCE¹⁾
TYPICAL TCR AND
MAX. SPREAD¹⁾
(ppm/°C)
50 Ω to 80 kΩ
± 0.01 %
±2±3
20 Ω to < 50 Ω
± 0.02 %
±2±4
10 Ω to < 20 Ω
± 0.05 %
±2±6
FIGURE 1 - POWER DERATING CURVE
- 55 °C
200
+ 70 °C
175
150
125
100
75
50
5 Ω to < 10 Ω
± 0.1 %
Note
1. Tighter performances are available
±2±8
25
0- ₇₅
- 25
+ 25 + 75 + 125 + 175
Ambient Temperature (°C)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63102
Revision: 14-Nov-07
For any questions, contact: [e-mail]
www.vishay.com
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