VHP100
Vishay Foil Resistors
Ultra-High Precision Hermetically Sealed Bulk Metal
®
Foil Resistor
with Zero TCR, no Humidity Effect and 0.005 % Tolerance within a
Unique Construction, Minimizing the Effects of Stress Factors
FEATURES
•
Essentially zero TCR
•
Absolute resistance change
(window):
VHP100 < 60 ppm (- 55 °C to + 125 °C)
VHP101 < 10 ppm (+ 15 °C to + 45 °C)
•
Tolerance: to ± 0.005 % (50 ppm) - (available to
± 0.001 % (10 ppm))
•
No humidity effect: hermetically sealed against moisture
•
Load life stability: ± 50 ppm typical for 2000 h, 70 °C at
0.3 W
•
Shelf life stability: ± 2 ppm typical after at least 6 years
•
Resistance range: 100
Ω
to 150 kΩ (higher or lower values
available on request)
•
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) up to 25 000 V
•
Non inductive, non capacitive design
•
Rise time: 1 ns effectively no ringing
•
Thermal stabilization < 1 s
•
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
•
Thermal EMF: 0.05 µV/°C typical
•
Voltage coefficient: < 0.1 ppm/V
•
Inductance: < 0.08 µH
•
Non hot spot design
•
Hermeticity: 10
-7
atmospheric cc/s max.
•
Terminal finish: lead (Pb)-free, tin/lead alloy
•
Compliant to RoHS directive 2002/95/EC
•
Oil filled as standard,
air filled available upon request
•
Load-life stability can be considerably improved through
in-house oriented tests
INTRODUCTION
The new VHP100 type represents a metrology breakthrough.
A new construction concept combined with special
treatments make this resistor the first choice in the most
demanding instrumentation and laboratory applications.
The ability of the new VHP100 to minimize the changes in
resistance value when the resistor is subjected to load
variations and thermal stresses, ensure the ultra high
performances for the tight metrology specifications.
The total error budget of 2 ppm drift and the high speed
recovery represent an improvement of almost an order of
magnitude on the earlier model.
Vishay has achieved an essentially Zero Temperature
Coefficient Resistor in the VHP100 type. This oil filled
hermetically sealed device makes unique use of foil on
ceramic in such a way that self cancelling responses to
temperature are produced by combining equal and opposite
effects. This product is sold only in hermetic packages
because applications requiring this level of temperature
stability require humidity stability as well.
The value of the hermetic enclosure over the molded part is
in the long term performance. The hermetic sealing prevents
the ingress of moisture and oxygen, while the oil acts as a
thermal conductor.
TCR WINDOW DEFINITION
The TCR of the VHP100 is so small that an additional
definition -
window,
has been introduced. The window
definition requires that the absolute resistance remain within
the stated window over the temperature range specified. The
resistance of the VHP100 resistor stays within a 60 ppm
window over the entire military temperature range of - 55 °C
to + 125 °C (figures 1 and 3).
A window of 10 ppm is available for the laboratory instrument
range (+ 15 °C to + 45 °C); see figure 4 - type VHP101.
POST MANUFACTURING OPERATIONS
ENHANCE THE ALREADY GREATER
STABILITY OF FOIL RESISTORS
These PMO operations are uniquely applicable to resistors
made of resistive foil and they take the already superior
stability of foil devices one step further. The PMO operations
described are not applicable to thick film, thin film, or wire.
They constitute an exercising of the resin that bonds the foil
to the substrate.
The exercises that are employed are (1) temperature cycling
(2) short time overload, and (3) accelerated load life.
TCR TRACKING
Tracking of the VHP100 resistor is also vastly superior to
conventional precision resistors. Typical ± 5 ppm/°C precision
resistors have a worst-case tracking of 10 ppm/°C
(wirewounds, thick film, thin film) or a difference between
resistors of 1000 ppm (10 ppm/°C x 100 °C) when
temperature changes from + 25 °C to + 125 °C. For a
3 ppm/°C tracking (Vishay S102C) the difference will be
300 ppm (3 ppm/°C x 100 °C) for the same temperature
range. The VHP100 resistors will track to 60 ppm from - 55 °C
to + 125 °C, a five-fold improvement over the S102C resistor.
TEMPERATURE CYCLING
This exercise is done initially in the chip stage of all
production and will eliminate any fallout in the PMO cycling.
The cycling exercises the bonding resin and relaxes the foil
without reducing the bonding strength. A small reduction in
resistance is tolerable during this PMO operation.
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63003
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VHP100
Vishay Foil Resistors
SHORT TIME OVERLOAD
The STO operation is performed on all resistors during
manufacturing. Its function is to eliminate sports (if any) so
this PMO operation is further assurance.
FIGURE 4 - TYPICAL CURVES WITHIN 10 ppm WINDOW,
VHP101 LABORATORY INSTRUMENT RANGE
Deviation ppm
(+ 15 °C to + 45 °C): Typical TCR = 0.3 ppm/°C, Ref. + 25 °C
10 ppm
Window
+ 15
+ 20
+ 25
+ 30
+ 35
+ 40
+ 45
+ 50
ACCELERATED LOAD
The standard load-life curve of a foil resistor exhibits a
change in the beginning and not much change after the first
100 h. This knee in the load-life curve can be removed so
that the resistor is now always on the flat part of the curve by
employing the PMO exercise of accelerated loading. How
much acceleration is a function of the application and should
be worked out between our applications engineering
department and your design team.
These same operations when applied to resistors of thick
film, thin film, and wire have vastly different consequences
and are applicable to foil only. They are an enhancement to
foil performance but can drive other devices out of tolerance
or open. The failure mechanisms in these other devises are
too numerous to discuss here but suffice it to say, foil is the
least affected by these PMO operations and they should be
considered when the level of stability required is beyond the
published limits for standard product.
Temperature (°C)
FIGURE 5 - STANDARD PRINTING
Front View
L
VISHAY
XXXX
VHP100
Rear View
W
100R01
0.01 %
XXXX
Resistance
Value Code
Tolerance
Serial No.
ST
Date Code
01
10
Year Week
LS
Lead Material #22 AWG
(0.025 Dia) Solder Coated Copper
E
LL
H
Model
Number
FIGURE 1 - A TYPICAL VHP100 RESISTANCE
TEMPERATURE CURVE
Deviation ppm
TOLERANCE
60 ppm
Window
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
RESISTANCE SPECIFIED IN
SIGNIFICANT DIGITS
3
4
5
6
± 1.0 %
± 0.1 %
Temperature (°C)
± 0.01 %
± 0.005 %
FIGURE 2 - POWER DERATING CURVE
Percent of Rated Power
- 55 °C
+ 100
%
+ 75
%
+ 50
%
+ 25
%
+ 70 °C Rated Power
Note
The number of significant digits of resistance accuracy to be printed
on the resistor should be in accordance with the specified tolerance
TABLE 1 - VHP100 SERIES DIMENSIONS
INCHES
VHP100
W
L
VHP101
H
LL
0.162 ± 0.020
0.415 ± 0.020
0.430 ± 0.020
1.000 ± 0.125
0.150 ± 0.010
0.100 maximum
0.070 maximum
mm
4.11 ± 0.51
10.54 ± 0.51
10.92 ± 0.51
25.4 ± 3.18
3.81 ± 0.25
2.54 maximum
1.78 maximum
0
- 75
- 50
- 25
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
FIGURE 3 - TYPICAL CURVES WITHIN THE 60 ppm
WINDOW, VHP100 TCR FOR MIL RANGE
Deviation ppm
(- 55 °C to + 125 °C): Typical TCR = 0.6 ppm/°C, Ref. + 25 °C
60 ppm
Window
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
LS
(1)
ST
E
Note
(1)
For 0.200 lead spacing, specify
VHP102 (60 ppm)
or
VHP103
(10 ppm).
Temperature (°C)
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2
For any questions, contact:
foil@vishaypg.com
Document Number: 63003
Revision: 23-Mar-10
VHP100
Vishay Foil Resistors
TABLE 2 - VHP100 SPECIFICATIONS
Resistance Range
Tolerance at + 25 °C
Power
Load Life Stability
(1)
(for 2000 h)
Shelf-Life Stability
Thermal EMF
Due to temperature difference between leads
Due to self-heating at 0.1 W
High Frequency Operation
Rise/decay time
Inductance (L)
Capacitance (C)
Maximum Working Voltage
Voltage Coefficient
Current Noise
Hermeticity
100
Ω
to 150 kΩ
± 0.005 % to ± 1.0 %
0.3 W at + 70 °C (see figure 2)
0.3 W at + 70 °C; ± 0.015 % (150 ppm) maximum
ΔR
0.15 W at + 125 °C; ± 0.015 % (150 ppm) maximum
ΔR
± 0.0002 % (2 ppm) after 6 years
0.05 µV/°C
0 to 1 µV
1.0 ns for 1 kΩ without ringing
0.1 µH maximum, 0.08 µH typical
1.0 pF maximum, 0.5 pF typical
300 V
< 0.1 ppm/V
< 0.010 µV (RMS)/V (- 40 dB)
10
-7
atmospheric cc/s maximum
Note
(1)
Load/life stability is considerably improved by reducing the temperature, power, or through in-house oriented tests.
TABLE 3 - GLOBAL PART NUMBER INFORMATION
(2)
NEW GLOBAL PART NUMBER: Y007880K2500A9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
Y
0
0
7
8
8
0
K
2
5
0
0
A
9
L
PRODUCT CODE
(1)
0078
= VHP100
4078
= VHP101
5078
= VHP102
6078
= VHP103
RESISTANCE TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
PACKAGING
L
= bulk
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0078 80K2500 A 9 L:
TYPE: VHP100
VALUE: 80.25 kΩ
ABSOLUTE TOLERANCE: ± 0.05 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
HISTORICAL PART NUMBER: VHP100T 80K250 A B (will continue to be used)
VHP100
MODEL
VHP100
VHP101
VHP102
VHP103
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
80K250
RESISTANCE VALUE
80.25 kΩ
A
TOLERANCE
V
= ± 0.005 %
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
B
PACKAGING
B
= bulk
Notes
For 0.200 lead spacing, specify
VHP102 (60 ppm)
or
VHP103 (10 ppm).
(2)
For non-standard requests, please contact application engineering.
(1)
Document Number: 63003
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
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Vishay Precision Group, Inc.
Disclaimer
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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