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)
FEATURES
Any value at any tolerance available within resistance range
INTRODUCTION
The Z-Foil Technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR).
VPR221Z provides high rated power, excellent load life
stability , low Temperature Coefficient (TCR) and low Power
Coefficient (PCR) - all in one resistor. ± 0.05 ppm/°C
Absolute TCR removes error due to temperature gradients.
By taking advantage of the overall stability and reliability of
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.
IM
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Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
TABLE 1 - TCR AND TOLERANCE
TIGHTEST
RESISTANCE
TOLERANCE
± 0.05 %
RESISTANCE
RANGE ()
0.5 to < 1
1 to < 10
TYPICAL TCR AND
MAX. SPREAD
1)
± 0.2 ppm/°C ± 2.8 ppm/°C
Percent of Rated Power
± 0.02 %
± 0.2 ppm/°C ± 2.3 ppm/°C
10 to 500
± 0.01 %
± 0.2 ppm/°C ± 1.8 ppm/°C
Notes
•
1. MIL-Range (- 55 °C to + 125 °C, + 25 °C Ref.)
Contact Applications Engineering for other available values
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63116
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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± 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 %
Power coefficient “R 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
to 500
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
Temperature coefficient of resistance (TCR):
APPLICATIONS
Automatic test equipment (ATE)
High precision instrumentation
Electron beam application
Current sensing applications
I
Pulse applications
Military
I
1
Power amplifier
Power supplies
R
I
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1
V
E
2
I
2
FIGURE 1- POWER DERATING CURVE
- 55 °C
100
75
50
25
0
- 75
- 50
- 25
0
25
50
75
100
125
150
Ambient Temperature (°C)
VPR221Z (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 3 - TYPICAL TCR CURVE Z-FOIL
(for more details see table 1)
+ 500
+ 400
Mutual Inductance
Reduction due
to Change in
Current Direction
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
FIGURE 4 - VPR221Z DIMENSIONS
in inches (millimeters)
0.400 ± 0.010
(10.16 ± 0.25)
0.245 ± 0.010
(6.22 ± 0.25)
VISHAY
VPR221Z
1R0 1
%
0101
0.141 ± 0.005 Dia
(3.58 ± 0.13)
0.200 ± 0.030
(5.08 ± 0.76)
0.540 ± 0.040
(13.72 ± 1.02)
I
1
E
1
E
2
I
2
0.030 ± 0.002
(0.76 ± 0.05)
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0.100 ± 0.005
(2.54 ± 0.13)
A surface mount version of this product is available see data sheets for VPR220S, VPR221S
TABLE 2 - SPECIFICATIONS
Power Rating at + 25 °C
Current Noise
High Frequency Operation
Rise Time
Inductance
4)
(L)
Capacitance (C)
Voltage Coefficient
5)
Operating Temperature Range
Maximum Working Voltage
Thermal EMF
6)
Weight
8 W or 3 A
2)
on heat sink
3)
1.5 W in free air
Further derating not necessary.
< 0.010 µV (rms)/V of applied voltage (- 40 dB)
0.2 ns at 1 W
0.1 µH maximum: 0.03 µH typical
1)
1.0 pF maximum: 0.5 pF typical
1)
< 0.1 ppm/V
- 55 °C to + 150 °C
300 V, Not to exceed power rating
0.15 µV/°C maximum (lead effect)
1.2 g maximum
4. Inductance (L) mainly due to the leads.
5. The resolution limit of existing test requirement (within the
measurement capability of the equipment, “essentially zero”).
6. µV/°C relates to EMF due to lead temperature difference.
Notes
1. Maximum is 1.0 % A.Q.L. standard for all specifications except
TCR.
2. Whichever is lower.
3. Heat sink chassis dimensions are requirements per
MIL-R-39009/1B:
DIMENSIONS
L
W
H
T
inches
6.00
4.00
2.00
0.04
mm
152.4
101.6
50.8
1.0
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+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
- 400
- 0.16 ppm/°C
- 25
0
0.2 ppm/°C
- 500
- 55
+ 25
+ 60 + 75
+ 100 + 125
Ambient Temperature (°C)
0.150 ± 0.008
(3.81 ± 0.20)
0.115 ± 0.005
(2.92 ± 0.13)
0.050 ± 0.005
(1.27 ± 0.13)
0.615 Max
(15.62)
0.050 ± 0.005
(1.27 ± 0.13)
0.015 ± 0.002
(0.38 ± 0.05)
0.078 ± 0.005
(1.98 ± 0.13)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
+ 300
Document Number: 63116
Revision: 25-Mar-10
VPR221Z (Z-Foil)
Vishay Foil Resistors
TABLE 3 - PERFORMANCE SPECIFICATIONS
1)
MIL-PRF 39009
TEST OR CONDITION
Low temperature storage 24 hours at - 55 °C
Dielectric withstanding voltage 300 V AC at Atm
Dielectric withstanding voltage 200 V AC at Brm
Insulation resistance
Low temperature operation
Short time overload 5 x rated power for 5 seconds (in air)
Moisture resistance + 65 °C to - 10 °C, 90 to 98 Rh, 10 days
Terminal Strength
Load life 8 W at + 25 °C, 2000 hours with heat sink
Load life 1.5 W at + 25 °C for 2000 hours in free air
High temperature exposure + 150 °C
Note
1. Measurement error ± 0.001
MIL-PRF 39009
± 0.3 % + 0.01
± 0.2 % + 0.01
± 0.2 % + 0.01
> 10
4
M
TYPICAL
R
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
± 0.001 % (10 ppm)
MAXIMUM
R
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
> 10
4
M
TABLE 4 - GLOBAL PART NUMBER INFORMATION
DENOTES PRECISION
Y
VALUE
R
=
NEW GLOBAL PART NUMBER: Y1690420R220T9L (preferred part number format)
Y
1
6
9
0
4
2
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PRODUCT CODE
1690
= VPR221Z
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1690 420R220 T 9 L:
TYPE: VPR221Z
VALUE: 420.22
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: Lead (Pb)-free
PACKAGING: Bulk Pack
HISTORICAL PART NUMBER: VPR221Z T 420R22 TCR0.2 T B (will continue to be used)
VPR221Z
MODEL
T
420R22
TCR0.2
TCR
CHARACTERISTIC
TCR0.2
T
ABSOLUTE
TOLERANCE
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 pack
TERMINATION
OHMIC VALUE
420.22
T
= lead (Pb)-free
none = tin/lead
Note
* For non-standard requests, please contact Application Engineering.
Document Number: 63116
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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± 0.3 % + 0.01
± 0.002 % (20 ppm)
± 0.005 % (50 ppm)
± 0.008 % (80 ppm)
± 0.3 % + 0.01
± 0.001 % (10 ppm)
± 0.002 % (20 ppm)
± 0.5 % + 0.01
± 0.015 % (150 ppm)
± 0.002 % (20 ppm)
± 0.2 % + 0.01
± 0.001 % (10 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 1.0 % + 0.01
± 0.015 % (150 ppm)
± 0.01 % (100 ppm)
± 1.0 % + 0.01
± 0.015 % (150 ppm)
± 1.0 % + 0.05
± 0.005 % (50 ppm)
AER*
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
0
R
2
2
0
T
9
L
PACKAGING
L
= bulk pack
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Vishay Precision Group
Disclaimer
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behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
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purchase, including but not limited to, the warranty expressed therein.
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and conditions of purchase.
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including without limitation special, consequential or incidental damages, and (iii) any and all implied
warranties, including warranties of fitness for particular purpose, non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications
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Document No.: 63999
Revision: 27-Apr-11
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