VCS1625
Vishay Foil Resistors
SURFACE MOUNT
Foil Surface Mount Current Sensing Chip Resistors
with TCR of ± 2 ppm/°C and Load Life Stability of ± 0.02 % (200 ppm)
FEATURES
•
Temperature Coefficient of Resistance (TCR):
± 2.0 ppm/°C (MIL range) (See table 1)
Pb-free
•
Tolerance: to 0.1 %
Available
•
Load Life Stability: ± 0.02 % at 70 °C, 2000 hrs.
RoHS*
at rated power
•
Electrostatic Discharge (ESD) above 25 000
COMPLIANT
Volts
•
Short Time Overload
≤
± 0.005 %
•
Ohmic Values: 0.01
Ω
to 2.0
Ω
(for higher or lower values
please contact us)
•
Non Inductive, Non Capacitive design
•
Power Rating: 1 watt at + 70 °C (figure 3)
•
Current Rating: 5 Amperes maximum
•
Thermal EMF: 0.05 µV/°C typical
•
Non hot spot design
•
Current Noise: < - 40 dB
•
Rise Time: 1 ns without ringing
•
Voltage Coefficient: < 0.1 ppm/V
•
Non Inductive: < 0.08 µH
•
For better performances please review VCS1625Z (Z-Foil)
data sheet
Any value at any tolerance available within resistance range
INTRODUCTION
Model VCS1625 is a surface mount resistor designed with
4 pads for Kelvin connection. Utilizing Vishay Bulk Metal
®
Foil as the resistance element, it provides performance
capabilities far greater than other resistor technologies can
supply in a product of comparable size.
This small device dissipates heat almost entirely through the
pads so surface mount users are encouraged to be generous
with the board’s pads and traces. Gold terminations are
available on special order.
Our Application Engineering Department is available to
advise and to make recommendations. For non standard
technical requirements and special applications, please
contact us.
FIGURE 1 - TRIMMING TO VALUES
(Conceptual Illustration)
PR
O
TERMINATIONS
APPLICATIONS
•
•
•
•
•
•
•
•
0.200
(5.08)
0.070
(1.78)
B
•
Two lead (Pb)-free options are available:
Gold Plated or Tin Plated
•
Tin/Lead Plated
•
Automatic test equipment (ATE)
D
U
0.070
(1.78)
0.260
(6.60)
VE
D
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
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
Airborne (in heads-up display systems)
I
1
High precision instrumentation
Electron beam recording equipment
R
Electron microscopes
Current sensing applications
I
2
Forced balance electronic scales
Applications that require superior frequency stability
Military
•
Medical
IM
PR
O
FIGURE 2 - DIMENSIONS
in inches (millimeters)
L
W
Mounting
Pads (4)
I1
A
E1
H
I2
E2
Top View
Bottom View
L
H
W
A
B
INCHES
0.250 ± 0.010
0.160 ± 0.010
0.040 maximum
0.080 ± 0.005
0.040 ± 0.010
Solder Pad Layout
MILLIMETERS
6.35 ± 0.25
4.06 ± 0.25
1.02 maximum
2.03 ± 0.13
1.02 ± 0.25
* Pb containing materials are not RoHS compliant, exemptions may apply
SALES
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com • ISRAEL: foilsales.israel@vishay.com
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32
For technical questions, contact: foil@vishay.com
Document Number: 63023
Revision: 11-Dec-06
C
T
Electrical
Schematic
E
1
E
2
VCS1625
SURFACE MOUNT
Foil Surface Mount Current Sensing
Chip Resistors with TCR of ± 2 ppm/°C and
Load Life Stability of ± 0.02 % (200 ppm)
VALUE (Ω)
> 0R500 to 2R000
> 0R100 to 0R500
> 0R050 to 0R100
> 0R030 to 0R050
> 0R020 to 0R030
> 0R010 to 0R020
TOLERANCE
0.5 %
1%
1%
1%
1%
1%
Vishay Foil Resistors
TABLE 1 - TOLERANCE AND TCR VS RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25° Ref)
TYPICAL TCR AND MAX. SPREAD (ppm/°C)
±2±8
± 2 ± 13
± 2 ± 18
± 2 ± 33
± 2 ± 48
± 2 ± 78
Note
• Tolerances tighter than 0.5 % are available. Please contact Application Engineering foil@vishay.com
FIGURE 3 - POWER DERATING CURVE*
Percent of Rated Power
- 55 °C
100
75
50
25
0
- 75
FIGURE 4 - TYPICAL TCR CURVE
+ 150
+ 100
+ 50
+ 70 °C
∆
R
0
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
PR
O
- 100
- 150
- 200
- 50
- 25
0
R
(ppm)
- 50
D
U
+ 25
+ 50
+ 75
± 2 ppm/°C (+ 25 °C reference)
* Power Rating at + 70 °C
1 W on Alumina substrate
0.5 W on FR4
Ambient Temperature (°C)
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
Thermal Shock 5 x (- 65 °C to + 150 °C)
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Soldering Heat
Moisture Resistance
Note
* Measurement error 0.001 R
VE
D
MIL-PRF-55342H
ΔR
LIMITS
± 0.10 %
± 0.10 %
± 0.10 %
± 0.10 %
± 0.2 %
± 0.20 %
± 0.5 %
TYPICAL
ΔR
LIMITS
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
Load Life 2000 hrs at 70 °C: Rated Power On Ceramic PCB
IM
PR
O
TABLE 3 - ORDERING INFORMATION
RESISTANCE VALUE
LETTER
DESIGNATION
R
MULTIPLIER
FACTOR
x 1.0
TCR
TOLERANCE
D
± 0.5 %
F
± 1.0 %
G
± 2.0 %
J
± 5.0 %
TERMINATION
S
- Lead (Pb)-free
B
- Tin/Lead
G
- Gold Plated
PACKAGING
MODEL
CHIP SIZE
RESISTANCE
RANGE
VCS
1625
0.01
Ω
to 2.0
Ω
TCR2
Example:
VCS1625 1R0000 TCR2 FSW
Model: VCS1625
Value: 1.0
Ω
TCR2: 2 ppm/°C typical refers to any value in the resistance range (see table 1)
Tolerance: 1 %
Termination: Lead (Pb)-free
Packaging: Waffle Pack
SALES
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com • ISRAEL: foilsales.israel@vishay.com
Document Number: 63023
Revision: 11-Dec-06
For technical questions, contact: foil@vishay.com
C
T
+ 100
+ 125
MAXIMUM
ΔR
LIMITS
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.02 % (200 ppm)
± 0.03 % (300 ppm)
± 0.03 % (300 ppm)
± 0.04 % (400 ppm)
T
= Tape and Reel
W
= Waffle Pack
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33
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1