High Precision Foil Wraparound Surface Mount Chip Resistor with
TCR of ± 2 ppm/°C and Load Life Stability of ± 0.01 % (100 ppm)
VSM Series (0805, 1206, 1506, 2010, 2512)
Vishay Foil Resistors
Document Number: 63070 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 25-Mar-10 1
INTRODUCTION
Bulk Metal® Foil (BMF) technology out-performs all other
resistor technologies available today for applications that
require high precision and high stability, and allows
production of customer oriented products designed to satisfy
challenging and specific technical requirements.
The BMF provides an inherently low and predictable
Temperature Coefficient of Resistance (TCR) and excellent
load life stability for high precision analog applications.
Model VSM offers low TCR, excellent load life stability, tight
tolerance, excellent shelf life stability, low current noise and
low voltage coefficient, all in the same resistor.
The VSM has a full wraparound termination which ensures
safe handling during the manufacturing process, as well as
providing stability during multiple thermal cyclings.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us using the e-mail address in the footer below.
Note
(1) For tighter performances and non-standard values up to 150K,
please contact Vishay application engineering using the e-mail
address in the footer below.
FEATURES
•Temperature coefficient of resistance (TCR):
± 2.0 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
•Tolerance: to ± 0.01 %
•Power rating: to 400 mW at + 70 °C
•Load life stability: to ± 0.01 % at 70 °C, 2000 h
at rated power
•Resistance range: 10 Ω to 125 kΩ (for higher and 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. 1K2345 vs. 1K)
•Fast thermal stabilization < 1 s
•Electrostatic discharge (ESD) up to 25 000 V
•Short time overload: ≤ 0.01 %
•Non inductive, non capacitive design
•Rise time: 1 ns effectively no ringing
•Current noise: - 42 dB
•Voltage coefficient < 0.1 ppm/V
•Non inductive: < 0.08 µH
•Non hot spot design
•Terminal finishes available: lead (Pb)-free, tin/lead alloy
•Compliant to RoHS directive 2002/95/EC
•Matched sets are available per request
•Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
•For better performances please review VSMP and
VFCP Series datasheets
APPLICATIONS
•Automatic test equipment (ATE)
•High precision instrumentation
•Laboratory, industrial and medical
•Audio
•EB applications (electron beam scanning and recording
equipment, electron microscopes)
•Down hole instrumentation
•Communication
* Pb containing terminations are not RoHS compliant, exemptions may apply
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE VALUE (1)
(- 55 °C to + 125 °C, + 25 °C Ref.)
RESISTANCE
VALUE
(Ω)
TOLERANCE
(%)
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
250 to 125K ± 0.01 ± 2 ± 2
100 to < 250 ± 0.02 ± 2 ± 3
50 to < 100 ± 0.05 ± 2 ± 3
25 to < 50 ± 0.1 ± 2 ± 4
10 to < 25 ± 0.25 ± 2 ± 6
Top View
FIGURE 1 - POWER DERATING CURVE
100
75
50
25
0
- 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
Percent of Rated Power
+ 70 °C
- 55 °C
VSM Series (0805, 1206, 1506, 2010, 2512)
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63070
2Revision: 25-Mar-10
Note
(1)
Land pattern dimensions are per IPC-7351A
Note
(1)
As shown + 0.01
Ω
to allow for measurement errors at low values.
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
Before Trimming
Note: Foil shown in black, etched spaces in white
Interloop Capacitance
Reduction in Series
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Current Path
After Trimming
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
(For more Details, see Table 1)
Note
• The TCR values for < 100 Ω are influenced by the termination
composition and result in deviation from this curve.
- 55
- 50 - 25 0 + 25 + 50 + 75 + 100 + 125
± 2 ppm/°C
(+ 25 °C reference)
+ 150
+ 100
+ 50
0
- 50
- 100
- 150
- 200
Δ
R
R
(ppm)
Ambient Temperature (°C) and TCR Chord Slopes for
Different Temperature Ranges
TABLE 2 - DIMENSIONS AND LAND PATTERN in Inches (Millimeters)
CHIP SIZE L
± 0.005 (0.13)
W
± 0.005 (0.13)
THICKNESS
MAXIMUM
D
± 0.005 (0.13) Z (1) G (1) X (1)
0805 0.080 (2.03) 0.050 (1.27) 0.025 (0.64) 0.015 (0.38) 0.122 (3.10) 0.028 (0.71) 0.050 (1.27)
1206 0.126 (3.20) 0.062 (1.57) 0.025 (0.64) 0.020 (0.51) 0.175 (4.45) 0.059 (1.50) 0.071 (1.80)
1506 0.150 (3.81) 0.062 (1.57) 0.025 (0.64) 0.020 (0.51) 0.199 (5.05) 0.083 (2.11) 0.071 (1.80)
2010 0.198 (5.03) 0.097 (2.46) 0.025 (0.64) 0.025 (0.64) 0.247 (6.27) 0.115 (2.92) 0.103 (2.62)
2512 0.249 (6.32) 0.127 (3.23) 0.025 (0.64) 0.032 (0.81) 0.291 (7.39) 0.150 (3.81) 0.127 (3.23)
Top View
D
TW
L
Recommended Land Pattern
Footprint
Z
G
X
TABLE 3 - SPECIFICATIONS
CHIP SIZE RATED POWER (mW)
at + 70 °C
MAX. WORKING VOLTAGE
(≤)
RESISTANCE RANGE
(Ω)
MAXIMUM WEIGHT
(mg)
0805 100 28 V 10 to 8K 6
1206 150 61 V 10 to 25K 11
1506 200 78 V 10 to 30K 12
2010 300 145 V 10 to 70K 27
2512 400 220 V 10 to 125K 40
TABLE 4 - PERFORMANCES
TEST OR CONDITIONS MIL-PRF-55342
CHARACTERISTIC E ΔR LIMITS
TYPICAL
ΔR LIMITS
MAXIMUM
ΔR LIMITS (1)
Thermal Shock, 100 x (- 65 °C to + 150 °C) ± 0.1 % ± 0.005 % (50 ppm) ± 0.02 % (200 ppm)
Low Temperature Operation, - 65 °C, 45 min at Pnom ± 0.1 % ± 0.01 % (100 ppm) ± 0.02 % (200 ppm)
Short Time Overload, 6.25 x Rated Power, 5 s ± 0.1 % ± 0.01 % (100 ppm) ± 0.02 % (200 ppm)
High Temperature Exposure, + 150 °C, 100 h ± 0.1 % ± 0.01 % (100 ppm) ± 0.03 % (300 ppm)
Resistance to Soldering Heat ± 0.2 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
Moisture Resistance ± 0.2 % ± 0.005 % (50 ppm) ± 0.03 % (300 ppm)
Load Life Stability + 70 °C for 2000 h at Rated Power ± 0.5 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
PR×
VSM Series (0805, 1206, 1506, 2010, 2512)
Vishay Foil Resistors
Document Number: 63070 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 25-Mar-10 3
Notes
(1) Avoid the use of cleaning agents which could attack epoxy resins, which form part of the resistor construction
(2) Vacuum pick up is recommended for handling
(3) Soldering iron may damage the resistor
Note
(1) For non-standard requests, please contact application engineering.
FIGURE 4 - RECOMMENDED MOUNTING (1)(2)(3)
25 % to 85 % of T
A low profile solder fillet is
recommended to avoid unnecessary
stresses along top edge of
metallization. IR and vapor phase
reflow are best.
TABLE 5 - GLOBAL PART NUMBER INFORMATION (1)
NEW GLOBAL PART NUMBER: Y145512K7560T9R (preferred part number format)
DENOTES PRECISION VALUE CHARACTERISTICS
YR = Ω
K = kΩ
0 = standard
9 = lead (Pb)-free
1 to 999 = custom
PRODUCT CODE RESISTANCE TOLERANCE PACKAGING
1172 = VSM0805
1496 = VSM1206
1455 = VSM1506
1611 = VSM2010
1612 = VSM2512
T= ± 0.01 %
Q= ± 0.02 %
A= ± 0.05 %
B= ± 0.10 %
C= ± 0.25 %
D= ± 0.5 %
F= ± 1.0 %
R= tape and reel
W= waffle pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1455 12K7565 T 9 R:
TYPE: VSM1506
VALUES: 12.7560 kΩ
ABSOLUTE TOLERANCE: 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: tape and reel
HISTORICAL PART NUMBER: VSM1506 12K756 TCR2 T S T (will continue to be used)
VSM1506 12K756 TCR2 T S T
MODEL RESISTANCE
VALUE TCR
CHARACTERISTICS TOLERANCE TERMINATION PACKAGING
VSM0805
VSM1206
VSM1506
VSM2010
VSM2512
12.756 kΩT= ± 0.01 %
Q= ± 0.02 %
A= ± 0.05 %
B= ± 0.10 %
C= ± 0.25 %
D= ± 0.5 %
F= ± 1.0 %
S= lead (Pb)-free
B= tin/lead
T= tape and reel
W= waffle pack
4551 K752Y1 T96 R0
Vishay Precision Group
Document No.: 63999
Revision: 27-Apr-2011
www.vishaypg.com
1
Legal Disclaimer Notice
Disclaimer
Legal Disclaimer Notice
Disclaimer
Document No.: 63999
Revision: 27-Apr-2011
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.
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by any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless
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