VPR221Z Datasheet, PDF (1/4 Pages) Vishay Siliconix – Ultra High Precision Z-Foil Power Resistor in TO-220 Configuration with TCR of ± 0.05 ppm/°C,

VPR221Z (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Power Resistor in
TO-220 Configuration with TCR of ± 0.05 ppm/°C,
PCR of 4 ppm/W and Load Life Stability of ± 0.005 % (50 ppm)
CT _{Any value at any tolerance available within resistance range}
U _INTRODUCTION
The Z-Foil Technology provides a significant reduction of the
D ^{resistive component’s sensitivity to ambient temperature}
variations (TCR) and applied power changes (PCR).
VPR221Z provides high rated power, excellent load life
O _{stability , low Temperature Coefficient (TCR) and low Power}
Coefficient (PCR) - all in one resistor. ± 0.05 ppm/°C
R ^{Absolute TCR removes error due to temperature gradients.}
By taking advantage of the overall stability and reliability of
P ^{Vishay Bulk Metal® Z-Foil resistors, designers can}
significantly reduce circuit errors and greatly improve overall
circuit performances.
Model VPR221Z is a 4 lead kelvin connected device.
D _{Our Application Engineering Department is available to}
E ^{advise and make recommendations. For non-standard}
technical requirements and special applications, please
contact us.
V _{TABLE 1 - TCR AND TOLERANCE}
O RESISTANCE
RANGE (Ω)
TIGHTEST
RESISTANCE
TOLERANCE
TYPICAL TCR AND
MAX. SPREAD¹⁾
R _{0.5 to < 1}
± 0.05 %
± 0.2 ppm/°C ± 2.8 ppm/°C
P ^{1 to < 10}
± 0.02 %
± 0.2 ppm/°C ± 2.3 ppm/°C
10 to 500
IM ^Notes
± 0.01 %
± 0.2 ppm/°C ± 1.8 ppm/°C
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.) (see table 1)
• Tolerance: to ± 0.01 %
Pb-free
Available
RoHS*
COMPLIANT
• Power Coefficient “ΔR due to self heating”
4 ppm/W typical
• Rated Power: 8 W chassis mounted (MIL-PRF-39009)
• Load Life Stability: to ± 0.005 % at 25 °C for 2000 hours,
at 1.5 W
• Resistance Range: 0.5 Ω to 500 Ω
• Electrostatic Discharge (ESD) above 25 000 V
• Short Time Overload ≤ 0.001 % (10 ppm)
• Non Inductive, Non Capacitive Design
• Rise Time: 1 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
• Non Hot Spot Design
• Terminal Finishes available: Lead (Pb)-free
Tin/Lead Alloy
• Any value available within resistance range (e.g. 1K234)
• For better performances please contact us
APPLICATIONS
• Automatic Test Equipment (ATE)
• High Precision Instrumentation
• Electron Beam application
• Current Sensing applications
• Pulse applications
I
R
I
• Military
• Power amplifier
• Power supplies
I₁
E₁
E₂
I₂
V
FIGURE 1- POWER DERATING CURVE
- 55 °C
100
75
50
25
1. MIL-Range (- 55 °C to + 125 °C, + 25 °C Ref.)
• Contact Applications Engineering for other available values
0
- 75 - 50 - 25 0 25 50 75 100 125 150
Ambient Temperature (°C)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63116
Revision: 16-Jul-07
For any questions, contact: [e-mail]
www.vishay.com
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