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
www.foilresistors.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
E
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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For any questions, contact:
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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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Legal Disclaimer Notice
Vishay Precision Group
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
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.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase.
To the maximum extent permitted by applicable law, Vishay Precision Group
disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability,
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
and performance may vary over time. Statements regarding the suitability of products for certain types of
applications are based on Vishay Precision Group’s knowledge of typical requirements that are often placed on
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properties described in the product specification is suitable for use in a particular application.
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Document No.: 63999
Revision: 27-Apr-11
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