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FRSM Series of Precision Chip Resistors
Vishay Foil Resistors
Z-1 Foil Ultra High Precision Wrap-around Chip Resistor for
Improved Load Life Stability of 0.0025% (25 ppm) with TCR of
± 0.05 ppm/°C and withstands ESD of 25 KV min
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
Top View
INTRODUCTION
The FRSM is based on the new generation Z1- technology of
the Bulk Metal? Precision Foil resistor elements by Vishay
Precision Group (VPG), which makes these resistors
virtually insensitive to destabilizing factors. Their element,
based on the new Z-1 Foil is a solid alloy that displays the
desirable bulk properties of its parent material; thus, it is
inherently stable (remarkably improved load life stability of
25 ppm), noise-free and withstands ESD to 25KV or more.
The alloy is matched to the substrate and forms a single
entity with balanced temperature characteristics for an
unusually low and predictable TCR over a wide range from
-55 C° to more than 175C°. Resistance patterns are
photo-etched to permit trimming of resistance values to very
tight tolerances.
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.
FIGURE 1 - POWER DERATING CURVE
? Power rating: to 750 mW at + 70 °C
? Load life stability: ?
± 0.0025 % at 70 °C, 2000 h at rated power. ?
± 0.005 % at 70 °C, 10,000 h at rated power.
? Resistance Range: 5 ? ? to 125 k ?? (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)
? Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
? Electrostatic discharge (ESD) at least to 25kV
? Short time overload: 0.005 %
? 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 (1)
? Matched sets are available on request
? Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
? For higher temperature application up to +240 °C and for
better performances, please contact us
100
75
- 55 °C
+ 70 °C
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE (1) ?
(- 55 °C to + 125 °C, + 25 °C Ref.)
50
25
0
RESISTANCE
VALUE
( ? )
250 ? to 125K
100 ? to < 250
TOLERANCE
(%)
± 0.01
± 0.02
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
± 0.2 ± 1.8
± 0.2 ± 1.8
- 75
- 50
- 25
0 + 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
50 ? to < 100
25 ? to < 50
± 0.05
± 0.1
± 0.2 ± 2.8
± 0.2 ± 3.8
(1)
Lead (Pb)-free terminals
Tin/lead alloy terminals
Pb containing terminations are not RoHS compliant, exemptions may apply .
10 ? to < 25
5 ? to < 10
± 0.25
± 0.5
± 0.2 ± 3.8
± 0.2 ± 7.8
Document Number: 63209
Revision: 8-Nov-12
For any questions, contact: foil@vishaypg.com
www.vishayfoilresistors.com
1
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