High Precision Foil Resistor with TCR of ± 2.0 ppm/°C,
Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %
RCK Series
Vishay Foil Resistors
Document Number: 63214 For any questions, contact: foil@vishaypg.com www.vishayfoilresistors.com
Revision: 13-Jun-11 1
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
Vishay 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 RCK series of BMF resistors offers low TCR, excellent
load life stability, tight tolerance, fast response time, low
current noise, low thermal EMF and low voltage coefficient,
all in one resistor.
The RCK series is virtually insensitive to destabillizing
factors. The 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
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact foil@vishaypg.com.
TABLE 1 - RESISTANCE VERSUS TCR
(- 55 °C to + 125 °C, + 25 °C ref.)
RESISTOR(1) RESISTANCE
VALUE (Ω)
TYPICAL TCR AND
MAX SPREAD
(ppm/°C)
RCK0X80 to < 1M ± 2 ± 2.5
RCK0X50 to < 80 ± 2 ± 3.5
RCK0X0.5 to < 50 ± 2 ± 4.5
(1) X refers to RCK Series model number - see Table 2
FEATURES
•
Temperature coefficient of resistance (TCR):
- 55 °C to + 125 °C, 25 °C ref.
- RCK0
X
series: ± 2 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
Ω
to 1 M
Ω
(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)
•Electrostatic 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@vishaypg.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 ALLOYS
IN MILITARY RANGE
- 50 - 25 0 + 25 + 50 + 75 + 100 + 125
- 55
C Alloy
2 ppm/°C
–2 ppm/°C
+2 ppm/°C
+ 150
+ 100
+ 50
0
- 50
- 100
- 150
- 200
ΔR
R
(ppm)
Temperature (°C)
* Pb containing terminations are not RoHS compliant, exemptions may apply