Vishay CSM3637 Bulk metalâ® technology high precision, current sensing, power surface mount, metal strip resistor with resistance value from 1 mî©, rated power up to 3 w and tcr to 0 â± 15 ppm/â°c maximum Datasheet

CSM Series
Vishay Foil Resistors
Bulk Metal® Technology High Precision, Current Sensing, Power
Surface Mount, Metal Strip Resistor with Resistance Value from 1 mΩ,
Rated Power up to 3 W and TCR to 0 ± 15 ppm/°C Maximum
FEATURES
No minimum order quantity and any value at any
tolerance available within resistance range.
Vishay Foil Resistors’ application engineering department is
available to advise and make recommendations.
For non-standard technical requirements and special
applications, please contact [email protected].
B
C
R
I
I
A
D
V
Zin
~
=∞
Four terminal (Kelvin) design: allows for precise and
accurate measurements.
FIGURE 1 - POWER DERATING CURVE
+ 70 °C
Rated Power (%)
100
80
60
40
20
0
- 65 - 50
- 25
0
25
50
75
100
125
150
170
Ambient Temperature (°C)
• Temperature coefficient of resistance:
± 15 ppm/°C max. (- 55 °C to + 125 °C, + 25 °C
ref.); ± 10 ppm/°C max. (- 55 °C to + 125 °C,
+ 25 °C ref.) is available on request (see table 1)
• Power rating: 1 W to 3 W
• Resistance tolerance: ± 0.1 %
• Resistance range: 1 mΩ to 200 mΩ (1)
• Vishay Foil resistors are not restricted to standard values,
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 2.3456 mΩ vs. 2 mΩ)
• Load life stability to ± 0.2 % (70 °C, 2000 h at rated power)
• Short time overload: ± 0.1 % typical
• Thermal EMF: 3 µV/°C (DC offset error, significant for low
values)
• Maximum current: up to 54 A
• Proprietary processing techniques produce low TCR, tight
tolerance and improve stability
• Low inductance < 5 nH
• Solderable terminations
• Excellent frequency response to 50 MHz
• Matched sets are available on request
• Screening in accordance with EEE-INST002 available
(per MIL-PRF-55342 and MIL-PRF-49465; see 303144
and 303145 datasheets)
• Terminal finishes available: lead (Pb)-free, tin/lead alloy
• Prototype quantities available in just 5 working days
or sooner. For more information, please contact
[email protected]
• For better performance please contact Application
Engineering
• Compliant to RoHS directive 2002/95/EC
TABLE 1 - SPECIFICATIONS
PARAMETER
CSM2512
CSM3637
1 mΩ to 200 mΩ (1)
Resistance Range
Power Rating at 70 °C
1 W (2)
Maximum Current (3)
31 A
± 0.5 % (1 mΩ to < 3 mΩ)
± 0.1 % (3 mΩ to 200 mΩ)
± 50 ppm/°C (1 mΩ to < 3 mΩ)
± 15 ppm/°C (3 mΩ to 200 mΩ)
± 10 ppm/°C (3 mΩ to 10 mΩ) is available on request (4)
Tolerance
3 W ( 1 mΩ to 10 mΩ)
2 W (> 10 mΩ to 200 mΩ)
54 A
± 0.5 % (1 mΩ to < 2 mΩ)
± 0.1 % (2 mΩ to 200 mΩ)
± 25 ppm/°C (1 mΩ to < 3 mΩ)
± 15 ppm/°C (3 mΩ to 200 mΩ)
± 10 ppm/°C (1 mΩ to 10 mΩ) is available on request (4)
Temperature Coefficient
Max. (- 55 °C to + 125 °C,
+ 25 °C Ref.)
Operating Temperature
- 65 °C to + 170 °C
Range
Maximum Working Voltage
(P x R)1/2
Weight (Maximum)
0.09 g
Notes
(1) For CSM2512 up to 500 mΩ please contact application engineering: [email protected]
(2) For values above 0.1 Ω derate linearly to 80 % rated power at 0.5 Ω
(3) Maximum current for a given resistance value is calculated using I =
P⁄R
(4) Please contact application engineering: [email protected]
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63089
Revision: 3-May-11
For any questions, contact: [email protected]
0.29 g
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1
CSM Series
Vishay Foil Resistors
ABOUT CSM (Low Ohm Value 1 mΩ to 200 mΩ)
New high-precision Bulk Metal® surface-mount Power Metal
Strip® resistor of 1 mΩ to 200 mΩ that features an improved
load-life stability of ± 0.2 % at + 70 °C for 2000 h at rated
power, an absolute TCR of ± 15 ppm/°C maximum from
- 55 °C to + 125 °C, + 25 °C ref., and a tolerance of ± 0.1 %.
Typical current sensing resistors offer a load-life stability of
≥ 1 % through a 2000 h workload. The improved resistance
stability of the CSM Series makes it ideal for
tightened-stability voltage division and precision current
sensing applications in switching linear power supplies,
power amplifiers, measurement instrumentation, bridge
networks, and medical and test equipment. In addition, the
CSM Series complies with EEE-INST-002 (MIL-PRF 55342
and MIL-PRF 49465) for military and space applications.
Traditional Passive current sensors and shunts generate
heat under power, which changes their resistance, and thus
their voltage output. The CSM’s low absolute TCR reduces
errors due to temperature gradients, thus reducing a major
source of uncertainty in current measurement. The CSM
can withstand unconventional environmental conditions,
including the extremely high temperatures and radiation-rich
environments of down-hole oil exploration and well logging,
or the deep-sea underwater repeaters in cross-ocean
communications.
The stability of the CSM can be further enhanced by
post-manufacturing operations (PMO), such as temperature
cycling, short-time overload, and accelerated load life which
are uniquely applicable to Bulk Metal® Foil resistors.
in critical locations can greatly improve circuit performance,
long-term application-related performance, as well as the
designer’s peace-of-mind.
Additionally, the overall system cost is often reduced when a
knowledgeable designer concentrates costs in a few
exceptionally stable components whose proven minimaldeviation load and environmental stability can often eliminate
the necessity of additional compensating circuitry or
temperature-controlling systems. The higher reliability and
better overall system performances also achieve excellent
product results in the field, enhancing market acceptance
and product reputation.
Designers often unnecessarily pay for tighter tolerances than
required simply to accommodate the resistance stability
shifts they know to be imminent in an application due to the
large application-related changes in the components they
selected. Selection of a high-stability component like the
CSM in these applications eliminates the need for shift
allowance due to “planned instability” and allows the use of
looser initial tolerances than would be necessary with
current-sensing resistors based on other technologies.
The Key Applications
Applications requiring accuracy and repeatability under
stress conditions such as the following:
• Switching and linear power supplies
• Precision current-sensing
• Power management systems
The device features a low thermal electromotive force (EMF)
that is critical in many precision applications. The CSM’s
all-welded construction is composed of a Bulk Metal®
resistive element with welded copper terminations, plated for
soldering. The terminations make true ohmic contact with the
resistive layer along the entire side of the resistive element,
thereby minimizing temperature variations. Also, the resistor
element is designed to uniformly dissipate power without
creating hot spots, and the welded terminations material is
compatible with the element material.
• Feedback circuits
These design factors result in a very low thermal-EMF
(3 µV/°C) resistor, because in addition to the low thermal
EMF compatibility of the metals, the uniformity and thermal
efficiency of the design minimizes the temperature
differential across the resistor, thereby assuring low thermal
EMF generation at the leads. This further reduces the
“battery effect” exhibited by most current-sensing or
voltage-reference resistors. Thus, the parasitic voltage
generated at the junction of two dissimilar metals, which is
especially important in low-value current-sensing resistors, is
minimized, while the pure current-to-voltage conversion is
protected from such interference in DC applications.
• Electronic scales
• Power amplifiers
• Measurement instrumentation
• Precision instrumentation amplifiers
• Medical and automatic test equipment
• Satellites and aerospace systems
• Commercial and Military avionics
• Test and measurement equipment
The stability problems associated with analog circuits are
very pervasive, but knowledgeable selection of a few
high-quality resistors, networks, or trimming potentiometers
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For any questions, contact: [email protected]
Document Number: 63089
Revision: 3-May-11
CSM Series
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS AND IMPRINTING in inches (millimeters)
CSM2512 DIMENSIONS
CSM3637 DIMENSIONS
(1)
(1)
H
H
A
B
B
A
L
L
T
W
T
W
CSM3637 LAND PATTERN
CSM2512 LAND PATTERN
E1
I1
E1
I1
e
E2
E2
c
d
I2
c
I2
I
b
a
Kelvin Connection
I1, I2 - Current
E1, E2 - Sense
d
b
I
a
DIMENSIONS - TOLERANCES ± 0.010 (± 0.254), * ± 0.015 (± 0.381)
MODEL
RESISTANCE RANGE (mΩ)
L
W
H
T
1 to < 5
CSM2512
B
0.087 (2.210)
5 to < 7
0.250 (6.350)
0.125 (3.175)
0.025 (0.635)
7 to 200
CSM3637
A
0.047 (1.194)
0.030 (0.762)* 0.032 (0.813)*
0.030 (0.762)
1 to < 2
0.360 (9.144)
0.370 (9.398)
0.025 (0.635)
0.138 (3.505)
0.061 (1.55)
0.032 (0.813)
2 to 200
0.360 (9.144)
0.370 (9.398)
0.025 (0.635)
0.086 (2.184)
0.061 (1.549)
0.032 (0.813)
LAND PATTERN DIMENSIONS - TOLERANCES ± 0.003 (± 0.076)
MODEL
CSM2512
CSM3637
RANGE
a
b
c
d
e
I
0R001 to 0R0049
0.120 (3.05)
0.145 (3.68)
0.045 (1.14)
0.021 (0.53)
0.055 (1.39)
0.050 (1.27)
0R005 to 0R0069
0.083 (2.10)
0.145 (3.68)
0.045 (1.14)
0.021 (0.53)
0.055 (1.39)
0.125 (3.17)
0R007 to 0R2
0.065 (1.65)
0.145 (3.68)
0.045 (1.14)
0.021 (0.53)
0.055 (1.39)
0.160 (4.06)
0R001 to 0R0019
0.168 (4.27)
0.390 (9.91)
0.066 (1.68)
0.024 (0.610)
-
0.074 (1.88)
0R002 to 0R2
0.116 (2.95)
0.390 (9.91)
0.066 (1.68)
0.024 (0.610)
-
0.178 (4.52)
Note
(1)
White dot indicates top side of part for mounting purposes
Document Number: 63089
Revision: 3-May-11
For any questions, contact: [email protected]
www.vishayfoilresistors.com
3
CSM Series
Vishay Foil Resistors
TABLE 2 - CSM SERIES PERFORMANCE SPECIFICATIONS
TEST
Thermal Shock
Load Life Stability
Bias Humidity
Short Time Overload
CSM2512/CSM3637
CONDITIONS
MIL-PRF-49465B
ΔR LIMITS
TYPICAL ΔR LIMITS
MAXIMUM ΔR LIMITS
- 55 °C to + 150 °C, 1000 cycles,
15 min at each extreme
± (0.5 % + 0.0005R)
0.1 %
0.3 %
2000 h, 70 °C at rated power
± (1.0 % + 0.0005R)
0.2 %
0.5 %
+ 85 °C, 85 % humidity
10 % bias, 1000 h
± (0.5 % + 0.0005R)
0.05 %
0.2 %
5 x rated power for 5 s
(See note (3) from table 1)
± (0.5 % + 0.0005R)
0.1 %
0.2 %
High Temperature Exposure
1000 h, 170 °C
± (1.0 % + 0.0005R)
0.2 %
0.3 %
Low Temperature Storage
- 65 °C for 24 h
± (0.5 % + 0.0005R)
0.05 %
0.1 %
MIL-STD-202, method 106,
0 power, 7a and 7b not required
± (0.5 % + 0.0005R)
0.02 %
0.05 %
Moisture Resistance
Shock
100 g, 6 ms, 5 pulses
± (0.1 % + 0.0005R)
0.02 %
0.05 %
Vibration
(10 Hz to 2000 Hz) 20 g
± (0.1 % + 0.0005R)
0.02 %
0.05 %
Resistance to Soldering Heat
10 s to 12 s at + 260 °C
± (0.25 % + 0.0005R)
0.05 %
0.1 %
MIL-STD-202
95 % coverage
-
-
Solderability
FIGURE 3 - LOAD LIFE RESULTS OF CSM2512
CSM2512 0R05
Load Life 2000HRS @ 1W @ +70C (15 units)
3000
2500
2000
1500
R/R (ppm)
1000
500
0
-500 0
500
1000
1500
2000
2500
-1000
-1500
-2000
-2500
-3000
Time (Hours)
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For any questions, contact: [email protected]
Document Number: 63089
Revision: 3-May-11
CSM Series
Vishay Foil Resistors
FIGURE 4 - THERMAL SHOCK RESULTS OF CSM3637 AND CSM2512
Thermal Shock (-55°C to +150°C) x 1000 Cycles
20 Units Each Type and Value
2000
1500
∆R/R (ppm)
1000
500
0
-500
-1000
-1500
-2000
CSM3637 0R1
CSM3637 0R2
CSM2512 0R1
CSM2512 0R2
Type and Value
FIGURE 5 - BIAS HUMIDITY RESULTS OF CSM3637 AND CSM2512
Bias Humidity 1000 Hrs @ +85°C @ 85% RH
10 Units Each Type and Value
1000
800
600
∆R/R (ppm)
400
200
0
-200
-400
-600
-800
-1000
CSM3637 0R2
CSM3637 0R1
CSM2512 0R1
CSM2512 0R2
Type and Value
Document Number: 63089
Revision: 3-May-11
For any questions, contact: [email protected]
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CSM Series
Vishay Foil Resistors
FIGURE 6 - PULSE TEST I
CSM3637 0R005 Test - 10 units
(5 Pulses of 5 sec @ 30 A, 10 sec @ 0 A)
Average Resistance Deviation: 696 ppm
STD = 305 ppm, Measurement Error = 0.0005R
35
Current (A)
30
25
20
15
10
5
0
10 sec
5 sec
Time (sec)
FIGURE 7 - PULSE TEST II
CSM3637 0R005 Pulse Test - 10 units
(35 Pulses of 0.2 msec @ 20 A, 0.5 msec @ 3 A)
Average Resistance Deviation: 13.3 ppm
STD = 27.3 ppm, Measurement Error = 0.0005R
Current (A)
25
20
15
10
5
0
0.2
msec
0.5
msec
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Time (msec)
For any questions, contact: [email protected]
Document Number: 63089
Revision: 3-May-11
CSM Series
Vishay Foil Resistors
TABLE 3 - GLOBAL PART NUMBER INFORMATION
(1)
NEW GLOBAL PART NUMBER: Y14870R12400B0R (preferred part number format)
DENOTES PRECISION
VALUE
CHARACTERISTICS
Y
R=Ω
0 = standard
9 = lead (Pb)-free
1 to 999 = custom
Y
1
4
8
7
0
R
1
2
4
0
0
B
0
PRODUCT CODE
RESISTANCE TOLERANCE
PACKAGING
1487 = CSM2512
1488 = CSM3637
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
W = waffle
R = tape and reel
R
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1487 0R12400 B 0 R:
TYPE: CSM2512
VALUE: 124.0 mΩ
ABSOLUTE TOLERANCE: ± 0.1 %
TERMINATION: standard tin/lead
PACKAGING: tape and reel
HISTORICAL PART NUMBER: CSM2512 0R1240 B B T (will continue to be used)
CSM2512
0R1240
B
B
T
MODEL
OHMIC VALUE
ABS. TOLERANCE
TERMINATION
PACKAGING
0.124 Ω
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
S = lead (Pb)-free
B = tin/lead
T = tape and reel
W = waffle pack
Note
(1) For non-standard requests, please contact application engineering
Document Number: 63089
Revision: 3-May-11
For any questions, contact: [email protected]
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7
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
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Precision Group for any damages arising or resulting from such use or sale. Please contact authorized
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Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-2011
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