VSMP Series (ꢀ8ꢀꢁ, 12ꢀ6, 1ꢁꢀ6, 2ꢀ1ꢀ, 2ꢁ12) (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Foil Wraparound Surface Mount Chip Resistor
with TCR of ꢀ0ꢀꢁ ppꢂm/C and Power Coefficient of ꢁ ppꢂ at
Rated Power and Load Life Stability of ꢀ0ꢀꢀꢁ ꢃ (ꢁꢀ ppꢂ)
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 “ΔR due to self heating”:
5 ppm at rated power
• Power rating: to 750 mW at + 70 °C
• Load life stability: to 0.005 % at 70 °C, 2000 h at rated
power
Top View
• Resistance range: 10 Ω to 125 kΩ (for higher and lower
values, please contact us)
• Vishay Foil resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 1K2345 vs. 1K)
• Fast thermal stabilization < 1 s
• Electrostatic discharge (ESD) up to 2ꢁ ꢀꢀꢀ V
• Short time overload: ≤ 0.005 %
• Non inductive, non capacitive design
• Rise time: 1 ns effectively no ringing
• Current noise: - 42 dB
• Voltage coefficient < 0.1 ppm/V
• Non inductive: < 0.08 µH
INTRODUCTION
VSMP Series is the industry’s first device to provide high
rated power, excellent load life stability along with extremely
low TCR all in one resistor.
One of the most important parameters influencing stability is
the temperature coefficient of resistance (TCR). Although the
TCR of foil resistors is considered extremely low, this
characteristic has been further refined over the years. The
VSMP Series utilizes ultra high precision Bulk Metal® Z-foil.
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
(power coefficient). Along with the inherently low PCR and
TCR, Z-foil technology also provides remarkably improved
load life stability, low noise and availability of tight tolerance.
• Non hot spot design
• Terminal finishes available: lead (Pb)-free, tin/lead alloy
• Compliant to RoHS directive 2002/95/EC
• Matched sets are available on request
• Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishay.com
The VSMP has a full wraparound termination which ensures
safe handling during the manufacturing process, as well as
providing stability during multiple thermal cyclings.
• For better performances please contact us
APPLICATIONS
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us using the e-mail address in the footer below.
• Automatic test equipment (ATE)
• High precision instrumentation
• Laboratory, industrial and medical
• Audio
• EB applications (electron beam scanning and recording
equipment, electron microscopes)
• Down hole instrumentation
• Communication
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE (1)
(- 55 °C to + 125 °C, + 25 °C Ref.)
RESISTANCE
VALUE
TYPICAL TCR AND
MAX0 SPREAD
(ppꢂm/C)
TOLERANCE
(ꢃ)
FIGURE 1 - POWER DERATING CURVE
(Ω)
+ 7ꢀ /C
- ꢁꢁ /C
1ꢀꢀ
7ꢁ
ꢁꢀ
2ꢁ
ꢀ
250 to 125K
100 to < 250
50 to < 100
25 to < 50
0.01
0.02
0.05
0.1
0.2 1.8
0.2 1.8
0.2 2.8
0.2 3.8
0.2 3.8
10 to < 25
0.25
Note
(1)
For tighter performances and non-standard values up to 150K,
please contact Vishay application engineering using the e-mail
addresses in the footer below.
- 7ꢁ - ꢁꢀ - 2ꢁ
ꢀ
+ 2ꢁ + ꢁꢀ + 7ꢁ + 1ꢀꢀ + 12ꢁ + 1ꢁꢀ + 17ꢁ
Aꢂbient Teꢂperature (/C)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63060
Revision: 24-Mar-09
For any questions, contact: foil@vishay.com
www.vishay.com
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