VSMP Series (0603, 0805, 1206, 1506, 2010, 2018, 2512) (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Foil Wraparound Surface Mount Chip Resistor
with TCR of ± 0.05 ppm/°C and Power Coefficient of 5 ppm at
Rated Power and Load Life Stability of ± 0.005 % (50 ppm)
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.)
Resistance tolerance: to ± 0.01 %
Power coefficient “R due to self heating”:
5 ppm at rated power
Power rating: to 750 mW at + 70 °C (see table 3)
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated
power
Resistance range: 5
to 125 k (for lower or higher
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)
Thermal stabilization time < 1 s
(nominal value achieved within 10 ppm of steady state
value)
Electrostatic discharge (ESD) at least to 25 kV
Short time overload:
0.005 %
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage
(< - 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 are available on request
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
Top View
(for date code print specification please refer to table 2)
INTRODUCTION
VSMP Series is the industry’s first device to provide high
rated power and 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 of Resistance, or PCR). Along with the
inherently low PCR and TCR, Z-Foil technology also
provides remarkably improved load life stability, low noise
and tight tolerances.
The VSMP resistor has a full wraparound termination which
assures secure contact during the manufacturing process,
as well as providing stability during multiple thermal cyclings.
Vishay Foil Resistors' (VFR) application engineering
department is available to advise and make
recommendations. For non-standard technical requirements
and special applications, please contact VFR using the
e-mail address in the footer below.
Percent of Rated Power
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE
(1)
(- 55 °C to + 125 °C, + 25 °C Ref.)
RESISTANCE
VALUE
()
250to 125K
100to < 250
50to < 100
25to < 50
10to < 25
5 to < 10
TOLERANCE
(%)
± 0.01
± 0.02
± 0.05
± 0.1
± 0.25
± 0.5
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
± 0.2 ± 1.8
± 0.2 ± 1.8
± 0.2 ± 2.8
± 0.2 ± 3.8
± 0.2 ± 3.8
± 0.2 ± 7.8
FIGURE 1 - POWER DERATING CURVE
- 55 °C
100
75
50
25
0
- 75
+ 70 °C
- 50
- 25
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
* Pb containing terminations are not RoHS compliant; exemptions
may apply
Note
(1)
For tighter performances and non-standard values lower than
5
and above 125K, please contact VFR’s application
engineering using the e-mail addresses in the footer below
Document Number: 63060
Revision: 29-Oct-2012
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
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