VCS1625ZP (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Surface Mount Current Sensing Chip Resistor
with Power Rating to 1 W and Temperature Coefficient of Resistance of
:
± 0.05 ppm/°C and Power Coefficient of 5 ppm at Rated Power
FEATURES
NEW
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).
Designers can now guarantee a high degree of stability and
accuracy in fixed-resistor applications using solutions based
on VPG’s revolutionary Z-foil technology.
Model VCS1625ZP is a surface mount chip resistor designed
with 4 pads for Kelvin connection. Utilizing VPG’s Bulk
Metal
®
Z-foil as the resistance element, it provides
performance capabilities far greater than other resistor
technologies can supply in a product of comparable size.
0.05 ppm/°C absolute TCR removes errors due to
temperature gradients.
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.
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
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FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power
- 55 °C
+ 70 °C
100
75
50
25
0
- 75
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
•
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)
•
Resistance range: 0.3
Ω
to 10
Ω
(for higher or
lower values please contact us)
•
Vishay Foil Resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 1.234
Ω
vs. 1
Ω)
•
Resistance Tolerance: to ± 0.2% (0.05% and 0.1% are
also available)
•
Power coefficient “ΔR due to self heating”: 5 ppm at rated
power
•
Load life stability: 0.02 % at 70 °C, 2000 h at rated power
•
Electrostatic discharge (ESD) at least to 25 000 V
•
Short time overload < 0.005 %
•
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
•
Power rating: 1 W at + 70 °C (figure 1)
•
Non inductive, non capacitive design
•
Rise time: 1 ns effectively no ringing
•
Current rating: 5 A maximum
•
Current noise: 0.010 µV
RMS
/V of applied voltage(< - 40 dB)
•
Voltage coefficient: < 0.1 ppm/V
•
Non inductive: < 0.08 µH
•
Non hot spot design
•
Prototype quantities available in just 5 working days or
sooner.
•
For higher temperature application above +150 °C and for
better performances please contact us.
Ambient Temperature (°C)
TABLE 1 - SPECIFICATIONS
(2)
MODEL
NUMBER
RESISTANCE
RANGE
> 2.0
Ω
to 10
Ω
0.3
Ω
to 2.0
Ω
RESISTANCE
TOLERANCE
(3)
VCS1625ZP
± 0.2 %, ± 0.5 %; ± 1.0 %
± 0.5 %; ± 1.0 %
Notes
(1)
Whichever is lower
(2)
Tighter performances are available. Please contact application engineering foil@vishaypg.com
(3)
0.05% and 0.1% are also available per special request
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63155
Revision: 7-Feb-11
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
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TERMINATIONS
•
Two lead (Pb)-free options are available:
gold plated or tin plated
•
Tin/lead plated
TYPICAL TCR and MAX. SPREAD
(- 55 °C to + 125 °C, + 25 °C Ref)
± 0.2 ± 2.8 ppm/°C
POWER RATING
at + 70 °C
(1)
1 W on FR4 PCB
5A
MAXIMUM
CURRENT
(1)
VCS1625ZP (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS
in Inches (Millimeters)
Solder Pad Layout
2 oz. Copper (70 Microns)
Coated by Solder mask
L
W
0.806 (20.47)
0.020 (0.51)
H
I2
E2
0.806 (20.47)
0.200 (5.08)
0.020 (0.51)
I1
E1
B
Top View
Bottom View
INCHES
L
H
W
A
B
0.250 ± 0.010
0.160 ± 0.010
0.040 maximum
0.080 ± 0.005
0.040 ± 0.010
FIGURE 3 - TRIMMING TO VALUES
(Conceptual Illustration)*
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Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
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
* To acquire a precision resistance value, the Bulk Metal Foil chip is trimmed by
selectively removing built-in “shorting bars.” To increase the resistance in known
increments, marked areas are cut, producing progressively smaller increases in
resistance. This method eliminates the effect of “hot spot” and improves the long term
stability of the hybrid chips.
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
Thermal shock 5 x (- 65 °C to + 150 °C)
Low temperature operation, - 65 °C, 45 min at P
nom
Short time overload, 6.25 x rated power, 5 s
Resistance to soldering heat
Moisture resistance
Load life stability 2000 h at 70 °C at 1 W
High temperature exposure, + 150 °C, 100 h
Note
(1)
Measurement error 0.001R
www.vishayfoilresistors.com
2
For any questions, contact:
foil@vishaypg.com
Document Number: 63155
Revision: 7-Feb-11
PR
O
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I
1
E
1
R
I
2
E
2
Solder Coated Pads
(Windows in Solder Mask)
0.070 (1.78)
0.260 (6.60)
Mounting
Pads (4)
0.070 (1.78)
A
Electrical
Schematic
MILLIMETERS
6.35 ± 0.25
4.06 ± 0.25
1.02 maximum
2.03 ± 0.13
1.02 ± 0.25
FIGURE 4 - TYPICAL TCR CURVE Z-FOIL
+ 500
+ 400
+ 300
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
Ambient Temperature (°C)
MIL-PRF-55342
ΔR
LIMITS
± 0.10 %
± 0.10 %
± 0.10 %
± 0.10 %
± 0.2 %
± 0.2 %
± 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)
MAXIMUM
ΔR
LIMITS
(1)
± 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)
VCS1625ZP (Z-Foil)
Vishay Foil Resistors
POST MANUFACTURING OPERATIONS OR PMO
Military applications can include requirements for
performance under conditions of stress beyond the normal
and over extended periods of time. This calls for more than
just selecting a standard device and applying it to a circuit.
The standard device may turn out to be all that is needed but
an analysis of the projected service conditions should be
made and it may well dictate a routine of stabilization known
as post manufacturing operations or PMO. The PMO
operations that will be discussed are only applicable to Foil
resistors. They stabilize Foil resistors while they are harmful
to other types. Short time overload, accelerated load life, and
temperature cycling are the three PMO exercises that do the
most to remove the anomalies down the road. Foil resistors
are inherently stable as manufactured. These PMO
exercises are only of value on foil resistors and they improve
the performance by small but significant amounts. Users are
encouraged to contact VPG's Foil applications engineering
for assistance in choosing the PMO operations that are right
for their application.
TABLE 3 - GLOBAL PART NUMBER INFORMATION
DENOTES PRECISION
Y
VALUE
R
=
Ω
NEW GLOBAL PART NUMBER: Y16061R50000D9W (preferred part number format)
Y
1
6
0
6
1
PRODUCT CODE
1606
= VCS1625ZP
RESISTANCE TOLERANCE
A
= ± 0.05 %
B
= ± 0.1 %
E
= ± 0.2 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
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FOR EXAMPLE: ABOVE GLOBAL ORDER Y1606 1R50000 D 9 W:
TYPE: VCS1625ZP
VALUE: 1.5
Ω
ABSOLUTE TOLERANCE: ± 0.5 %
TERMINATION: lead (Pb)-free
PACKAGING: waffle pack
HISTORICAL PART NUMBER: VCS1625ZP 1R5000 TCR0.2 D S W (will continue to be used)
VCS1625ZP
MODEL
1R5000
TCR0.2
TCR
D
RESISTANCE
TOLERANCE
A
= ± 0.05 %
B
= ± 0.1 %
E
= ± 0.2 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
S
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
G
= gold plated
W
PACKAGING
T
= tape and reel
W
= waffle pack
OHMIC VALUE
1.5
Ω
VCS1625ZP
Characteristic
Note
(1)
Application engineering release: for non-standard requests, please contact application engineering.
Document Number: 63155
Revision: 7-Feb-11
For any questions, contact:
foil@vishaypg.com
PR
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CHARACTERISTICS
(1)
0
= standard part, tin/lead termination
9
= standard part, lead (Pb)-free termination
129
= standard part, gold plated
Other
= custom
R
5
0
0
0
0
D
9
W
PACKAGING
R
= tape and reel
W
= waffle pack
www.vishayfoilresistors.com
3
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
Vishay Precision Group products. It is the customer’s responsibility to validate that a particular product with the
properties described in the product specification is suitable for use in a particular application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by
any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling Vishay Precision Group products not expressly indicated for use
in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any
damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group personnel
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Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
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