Ultra High Precision Foil Wraparound Surface Mount Chip Resistor
with TCR of ± 0.05 ppm/°C and Power Coefficient of 5 ppm at
Rated Power and Load Life Stability of ± 0.005 % (50 ppm)
VSMP Series (0805, 1206, 1506, 2010, 2512) (Z-Foil)
Vishay Foil Resistors
Document Number: 63060 For any questions, contact: foil@vishaypg.com www.foilresistors.com
Revision: 25-Mar-10 1
INTRODUCTION
VSMP Series is the industry’s first device to provide high
rated power, excellent load life stability along with extremely
low TCR all in one resistor.
One of the most important parameters influencing stability is
the temperature coefficient of resistance (TCR). Although the
TCR of foil resistors is considered extremely low, this
characteristic has been further refined over the years. The
VSMP Series utilizes ultra high precision Bulk Metal® Z-foil.
The Z-foil technology provides a significant reduction of the
resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient). Along with the inherently low PCR and
TCR, Z-foil technology also provides remarkably improved
load life stability, low noise and availability of tight tolerance.
The VSMP 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
addresses in the footer below.
FEATURES
•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.)
•Tolerance: to ± 0.01 %
•Power coefficient “ΔR due to self heating”:
5 ppm at rated power
•Power rating: to 750 mW at + 70 °C
•Load life stability: to ± 0.005 % 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: ≤ 0.005 %
•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 on request
•Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
•For better performances please contact us
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 ± 0.2 ± 1.8
100 to < 250 ± 0.02 ± 0.2 ± 1.8
50 to < 100 ± 0.05 ± 0.2 ± 2.8
25 to < 50 ± 0.1 ± 0.2 ± 3.8
10 to < 25 ± 0.25 ± 0.2 ± 3.8
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
VSMP Series (0805, 1206, 1506, 2010, 2512) (Z-Foil)
Vishay Foil Resistors
www.foilresistors.com For any questions, contact: foil@vishaypg.com Document Number: 63060
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
Note
• The TCR values for < 100 Ω are influenced by the termination
composition and result in deviation from this curve.
+ 200
+ 100
0
- 100
- 200
- 300
- 500
- 55 - 25 + 25 + 60 + 75 + 100 + 125
ΔR
R
(ppm)
0
0.05 ppm/°C
- 0.1 ppm/°C 0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
- 0.16 ppm/°C
- 400
+ 300
+ 400
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 200 40 V 10 to 8K 6
1206 300 87 V 10 to 25K 11
1506 300 95 V 10 to 30K 12
2010 500 187 V 10 to 70K 27
2512 750 220 V 10 to 125K 40
PR×
TABLE 4 - LOAD LIFE STABILITY
(+ 70 °C for 2000 h)
CHIP SIZE MAXIMUM ΔR LIMITS
0805 ± 0.005 % at 100 mW
± 0.01 % at 200 mW
1206, 1506 ± 0.005 % at 150 mW
± 0.01 % at 300 mW
2010 ± 0.005 % at 200 mW
± 0.01 % at 500 mW
2512 ± 0.005 % at 500 mW
± 0.01 % at 750 mW
TABLE 5 - 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) ± 0.01 % (100 ppm)
Low Temperature Operation, - 65 °C, 45 min at Pnom ± 0.1 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
Short Time Overload, 6.25 x Rated Power, 5 s ± 0.1 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
High Temperature Exposure, + 150 °C, 100 h ± 0.1 % ± 0.01 % (100 ppm) ± 0.02 % (200 ppm)
Resistance to Soldering Heat ± 0.2 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
Moisture Resistance ± 0.2 % ± 0.005 % (50 ppm) ± 0.02 % (200 ppm)
Load Life Stability + 70 °C for 2000 h at Rated Power ± 0.5 % ± 0.005 % (50 ppm) ± 0.01 % (100 ppm)
VSMP Series (0805, 1206, 1506, 2010, 2512) (Z-Foil)
Vishay Foil Resistors
Document Number: 63060 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 6 - GLOBAL PART NUMBER INFORMATION (1)
NEW GLOBAL PART NUMBER: Y162612K7560T9R (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
1624 = VSMP0805
1625 = VSMP1206
1626 = VSMP1506
1627 = VSMP2010
1628 = VSMP2512
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 Y1626 12K7560 T 9 R:
TYPE: VSMP1506
VALUES: 12.7560 kΩ
ABSOLUTE TOLERANCE: 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: tape and reel
HISTORICAL PART NUMBER: VSMP1506 12K756 TCR0.2 T S T (will continue to be used)
VSMP1506 12K756 TCR0.2 T S T
MODEL RESISTANCE
VALUE TCR
CHARACTERISTICS TOLERANCE TERMINATION PACKAGING
VSMP0805
VSMP1206
VSMP1506
VSMP2010
VSMP2512
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
6261 K752Y1 T96 R0
Document Number: 63999 www.vishaypg.com
Revision: 22-Feb-10 1
Disclaimer
Legal Disclaimer Notice
Vishay Precision Group
1
All 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.
Vishay Precision Group disclaims any and all liability arising out of the use or application of any product described
herein or of any information provided herein to the maximum extent permitted by law. 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, which apply to these products.
No license, express or implied, by estoppel 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 medical, 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 to obtain written terms and conditions regarding products designed for such applications.
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