HZ Datasheet, PDF (1/5 Pages) Vishay Siliconix – Hermetically Sealed Ultra High Precision Z-Foil Technology Resistors with TCR of ± 0.2 ppm/°C, Tolerance of ± 0.001 % and

HZ Series (Z-Foil)
Vishay Foil Resistors
Hermetically Sealed Ultra High Precision Z-Foil Technology
Resistors with TCR of ± 0.2 ppm/°C, Tolerance of ± 0.001 % and
Load Life Stability of ± 0.005 %
FEATURES
• Temperature coefficient of resistance (TCR):
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
• Power coefficient “ΔR due to self heating”:
5 ppm at rated power
Any value available within resistance range
INTRODUCTION
• Tolerance: to ± 0.001 %
• Load life stability ± 0.002 % maximum ΔR (60 °C for
2000 h at 0.1 W per chip)
The Z-foil based oil filled, hermetically sealed HZ-series
resistors represent 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 elements of unsealed resistors, while at the
same time allowing the device to accept short periods of
overload without degradation.
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
H-series resistors become the most precise and stable
resistors available.
With accuracies of ± 0.001 % and a resistance range from
5 Ω to 1.1 MΩ and long term shelf life of less than 2 ppm,
these devices are virtually secondary standards that can be
carried in sets for daily or periodic calibration of factory
measurement equipment.
• Electrostatic discharge (ESD) > 25 000 V
• Resistance range: 5 Ω to 1.1 MΩ (higher or lower values of
resistance available)
• Power rating: 0.3 to 2.5 W at + 25 °C (depending on model
- see table 2)
• 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
The VHA series is also available with laboratory and
metrology level precision and long term stability with
additional in-house oriented process such as: special
TCR plotting, mounted chip stabilization, thermal shock
and bake prior to sealing, combined thermal shock and
power conditioning on finished product, thermal and
power conditioning, component linearity test.
• For better performances, please contact us
FIGURE 1 - TRIMMING TO VALUES
(Conceptual Illustration)
TABLE 1 - TOLERANCE AND 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 < 1M1
± 0.2 ± 2
50 to < 100
± 0.2 ± 3
5 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
Document Number: 63120
Revision: 17-Jun-08
For any questions, contact: [e-mail]
www.vishay.com
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