VHP203 Datasheet, PDF (1/5 Pages) Vishay Siliconix – Hermetically Sealed Miniature Ultra High Precision Z-Foil Technology

VHP203 (Z-Foil)
Vishay Foil Resistors
Hermetically Sealed Miniature Ultra High Precision Z-Foil Technology
Resistors with TCR of 0.05 ppm/°C, Tolerance of ± 0.001 % and
Load Life Stability of ± 0.005 %, Unaffected by Humidity
Any value available within resistance range
INTRODUCTION
The Z-foil based oil filled, hermetically sealed VHP203
resistor represents an industry breakthrough. The hermetic
sealing eliminates the ingress of moisture and oxygen, while
the oil acts as a thermal conductor, thus eliminating long term
degradation of elements of unsealed resistors, while at the
same time allowing the device to accept short periods of
overload without degradation.
The VHP203 is also available with laboratory and metrology
level precision and long term stability with additional inhouse
oriented process such as: special TCR plotting, chip
stabilitzation inhouse thermal shock and bake prior to
sealing, combined thermal shock and power conditioning on
finished product, thermal and power conditioning, CLT.
The Z-foil technology provides a significant reduction of the
resistive components sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR). When
combined with the hermetic sealing and oil filling, the
VHP203 resistor become the most precise and stable
resistor available.
The value of the hermetic enclosure over the molded part is
in long term performance.
With accuracy of ± 0.001 % (10 ppm) and a resistance range
from 10 Ω to 150 kΩ and long term shelf life of less than
2 ppm, this device is virtually a secondary standard that can
be carried in sets for daily or periodic calibration of factory
measurement equipment.
FEATURES
• Temperature coefficient of resistance (TCR):
± 0.05 ppm/°C (0 °C to 60 °C)
Pb-free
• Power coefficient “ΔR due to self heating”:
Available
5 ppm at rated power
RoHS*
• Tolerance: to ± 0.001 % (10 ppm)
COMPLIANT
• Load life stability: ± 0.002 % maximum ΔR (60 °C for
2000 h at 0.1 W per chip)
• Electrostatic discharge (ESD) > 25 000 V
• Resistance range: 10 Ω to 150 kΩ (higher or lower values
of resistance available)
• Power rating: 0.3 W at + 25 °C
• Shelf life stability: 2 ppm for at least 10 years
• Non inductive, non capacitive design
• Non hot spot design
• Rise time: 1.0 ns without ringing
• Current noise: < - 40 dB
• Thermal EMF: 0.05 µV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non inductive: < 0.08 µH
• Terminal finishes available: lead (Pb)-free
tin/lead alloy
• Impervious to harmful environments - oil filled
• For better performances, please contact us
• Prototype samples available from 24 h. For more
information, please contact [e-mail]
APPLICATIONS
• Metrology
• Laboratory
• Industrial
• Measurement
FIGURE 1 - TRIMMING TO VALUES
(Conceptual Illustration)
TABLE 1 - TCR VS. RESISTANCE VALUE
RESISTANCE VALUE
(Ω)
TYPICAL TCR AND
MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C ref.)
(ppm/°C)¹⁾
100 to < 150K
± 0.2 ± 2
50 to < 100
± 0.2 ± 3
10 to < 50
± 0.2 ± 4
Note
1. For lower TCR and for selected TCR tracking, please contact us
Interloop Capacitance
Reduction in Series
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note: Foil shown in black, etched spaces in white
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63146
Revision: 06-May-08
For any questions, contact: [e-mail]
www.vishay.com
1