High Precision Foil Resistor with TCR of ± 2.0 ppm/°C,
Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %
Document Number: 63001 For any questions, contact www.vishayfoilresistors.com
Revision: 02-Mar-15 foil@vpgsensors.com 1
S Series
INTRODUCTION
Bulk Metal
®
Foil (BMF) technology outperforms all other
resistor technologies available today for applications that
require high precision and high stability.
This technology has been pioneered and developed by
Visha
y Foil Resistors (VFR), and products based on this
technology are the most suitable for a wide range of
applications. BMF technology allows the production of
customer-oriented products, designed to satisfy specific
challenging technical requirements.
The S series of BMF resistors offers low TCR, excellent load
li
fe stability, tight tolerance, fast response time, low current
noise, low thermal EMF and low voltage coefficient, all in one
resistor.
The S series is virtually insensitive to destabillizing factors.
T
he resistor element is a solid alloy that displays the
desirable bulk properties of its parent material, thus it is
inherently stable and noise free. The standard design of
these resistors provides a unique combination of
characteristics found in no other single resistor.
VFR's application engineering department is available to
ad
vise and to make recommendations. For non-standard
technical requirements and special applications, please
contact
foil@vpgsensors.com.
TABLE 1 - RESISTANCE VERSUS TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
RESISTOR
(1) (2)
RESISTANCE
VALUE ()
TYPICAL TCR AND
MAX SPREAD
(p
pm/°C)
S10X(C)
/ (D) 80 to < 1M ± 2 ± 2.5
S10X(K) 80 to < 600K ± 1 ± 2.5
S10X(C)
/ (D)
50 to < 80
± 2 ± 3.5
S10X(K) ± 1 ± 3.5
S10X(C)
/ (D)
0.5 to < 50
± 2 ± 4.5
S10X(K) ± 1 ± 4.5
FEATURES
Temperature coefficient of resistance (TCR):
- 55 °C to + 125 °C, 25 °C ref.
- S10
X
C / D series: ± 2 ppm/°C typical (see table
1)
- S10
X
K series: ± 1 ppm/°C typical (see table 1)
Power rating: to 1 W at + 125 °C
Resistance tolerance: to ± 0.005 % (50 ppm)
Load life stability: ± 0.005 % at 70 °C, 2000 h at rated power
Resistance range: 0.5
to 1 M
(for higher or lower
values, please contact Application Engineering)
Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 1K2345 vs. 1K)
Elec
trostatic discharge (ESD) at least to 25 kV
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
Thermal EMF: 0.05 µV/°C
Voltage coefficient: < 0.1 ppm/V
Low inductance: < 0.08 µH
Non hot-spot design
Terminal finishes available: lead (Pb)-free, tin/lead alloy
Matched sets are available on request
(TCR tracking: to 0.5 ppm/°C)
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vpgsensors.com
For better TCR performances please review the
datasheets for the Z Series and Z203
FIGURE 1 - TYPICAL RESISTANCE CHANGE
VERSUS TEMPERATURE CURVES AND
CHORD SLOPES (TCR) OF TWO ALLOY
TYPES IN MILITARY RANGE
- 50 - 25 0 + 25 + 50 + 75 + 100 + 125
- 55
C Alloy
2 ppm/
°C
K Alloy
1 ppm/°C
+1 ppm/
°
C
–1 ppm/
°C
–2 ppm/°C
+2 ppm/°C
+ 150
+ 100
+ 50
0
- 50
- 100
- 150
- 200
ΔR
R
(ppm)
Temperature (°C)
(1)
X refers to S Series model number - see Table 2
(2)
(C) and (D) refer to C Foil Alloy Types; (K) refers to the K Foil Alloy type - see Figure 1
* Pb containing terminations are not RoHS compliant, exemptions may apply
