SMR1DZ Datasheet, PDF (1/5 Pages) Vishay Siliconix – Ultra High Precision Z-Foil Molded Surface Mount Resistor

SMR1DZ/SMR3DZ (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Molded Surface Mount Resistor with
TCR down to ± 0.05 ppm/°C, PCR of ± 5 ppm at Rated Power,
Flexible Terminations, and Load Life Stability of ± 0.005 % (50 ppm)
T _{Any value at any tolerance available within resistance range}
C _INTRODUCTION
The SMRxDZ is an ultra high precision molded surface
U _{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
D _{coefficient. One of the important parameters influencing}
stability is the Temperature Coefficient of Resistance (TCR).
Although the TCR of foil resistors is considered extremely
O low, this characteristic has been further refined over the
years. The SMRxDZ utilizes ultra high precision Bulk Metal^®
Z-Foil.
R _{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
P _{(power coefficient).}
Voltage division with tight tracking < 2 ppm/°C can be
achieved with 2 randomly selected units even with a large
D ratio between the two values.
Our Application Engineering Department is available to
E ^{advise and make recommendations. For non-standard}
technical requirements and special applications, please
contact us.
V _{TABLE 1 - TOLERANCE AND TCR VERSUS}
RESISTANCE VALUE
O (- 55 °C to + 125 °C, + 25 °C Ref.)
R ^VALUE
STANDARD
TOLERANCE¹⁾
TYPICAL TCR AND
MAX. SPREAD¹⁾
(ppm/°C)
50 Ω to 80 kΩ
± 0.01 %
± 0.2 ± 1.8
P _{20 Ω to < 50 Ω}
± 0.02 %
± 0.2 ± 2.8
10 Ω to < 20 Ω
± 0.05 %
± 0.2 ± 4.8
IM^{5 Ω to < 10 Ω}
± 0.1 %
± 0.2 ± 6.8
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 of Resistance (PCR)
Pb-free
Available
RoHS*
COMPLIANT
“ΔR due to self heating”: 5 ppm at Rated Power
• Flexible terminations ensure minimal stress transference
from the PCB due to a difference in Thermal Coefficient of
Expansions (TCE)
• Electrostatic Discharge (ESD) above 25 000 Volts
• Load Life Stability: ± 0.005 % (70 °C, 2000 hours 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
• Non Hot Spot Design
• Terminal Finishes available: Lead (Pb)-free
Tin/Lead Alloy
• Matched sets with TCR tracking are available upon request
• For higher performances please contact us
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 hours. For more
information, please contact [e-mail]
APPLICATIONS
• Precision amplifiers
• High precision instrumentation
• Medical
R2
• Automatic test equipment (ATE)
• Industrial
• Audio (High end stereo
equipment)
R1
Vi n
-
+
• EB application
• Military, airborne and space
• Pulse application
• Measurement instrumentation
Vout
SMRXDZ
FIGURE 1 - POWER DERATING CURVE
- 55 °C
200
+ 70 °C
175
150
125
100
75
Note
50
1. Tighter performances are available
25
* Pb containing terminations are not RoHS compliant, exemptions may apply
0- ₇₅
- 25
+ 25 + 75 + 125 + 175
Ambient Temperature (°C)
Document Number: 63118
Revision: 30-Jul-07
For any questions, contact: [e-mail]
www.vishay.com
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