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CSM Series (1487,88) Datasheet

Vishay Foil Resistors (Division of Vishay Precision Group)

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Datasheet

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Document No.: 63089
Revision: 28-Mar-2019
CSM Series
Bulk Metal® Technology High Precision, Current Sensing, Power Surface Mount, Metal Strip Resistor
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
FEATUR E S
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
Bulk Metal® 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
Quick prototype quantities available,
please contact: foil@vpgsensors.com
For better performance please contact:
application engineering
Compliant to RoHS directive 2002/95/EC
INTRODUCTION
No minimum order quantity and any value at any
tolerance available within resistance range.
The Vishay Foil Resistors (VFR) application engineering
department is available to advise and make
recommendations.
For non-standard technical requirements and special
applications, please contact: foil@vpgsensors.com.
Four terminal (Kelvin) design: allows for precise and
accurate measurements.
I
A
R
Zin
I
D
V
=
~
BC
Document No.: 63089
Revision: 28-Mar-2019
CSM Series
Figure 1 – Power Derating Curve
–65 –50 –25 0255075 100 125 150 170
Ambient Temperature (°C)
100
80
60
40
20
0
Rated Power (%)
+70°C
Notes
* This datasheet provides information about parts that are RoHS-compliant and/or parts that are non-RoHS-compliant. For example,
parts with lead (Pb) terminations are not RoHS compliant. Please see the information/tables in this datasheet for details.
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CSM Series
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Document No.: 63089
Revision: 28-Mar-2019
CSM Series
Table 1 – Specifications
PARAMETER CSM2512 CSM3637
Resistance Range 1 mΩ to 200 mΩ
Power Rating at 70°C 1 W(1) 3 W (1 mΩ to 10 mΩ)
2 W (>10 mΩ to 200 mΩ)
Maximum Current(2) 31 A 54 A
Tolerance ±0.5% (1 mΩ to <3 mΩ)
±0.1% (3 mΩ to 200 mΩ)
±0.5% (1 mΩ to <2 mΩ)
±0.1% (2 mΩ to 200 mΩ)
Temperature Coefficient Max.
(–55°C to +125°C, +25°C Ref.)
±50 ppm/°C (1 mΩ to <3 mΩ)
±15 ppm/°C (3 mΩ to 200 mΩ)(3)
±10 ppm/°C (3 mΩ to 10 mΩ)
is available on request(4)
±25 ppm/°C (1 mΩ to <3 mΩ)
±15 ppm/°C (3 mΩ to 200 mΩ)(3)
±10 ppm/°C (1 mΩ to 10 mΩ)
is available on request(4)
Operating Temperature Range 65°C to +170°C
Maximum Working Voltage (P × R)(1),(2)
Weight (Maximum) 0.09 g 0.29 g
Notes
(1) For values above 0.1 Ω derate linearly to 80% rated power at 0.5 Ω
(2) Maximum current for a given resistance value is calculated using I = P/R
(3) Loose TCR is available on request: 35ppm/C (3mΩ to 200mΩ)
(4) Please contact application engineering: foil@vpgsensors.com
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.
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.
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.
The stability problems associated with analog circuits
are very pervasive, but knowledgeable selection of
a few high-quality resistors, networks, or trimming
potentiometers
in critical locations can greatly improve circuit
performance, long-term application-related performance,
as well as the designer’s peace-of-mind.
Notes
* This datasheet provides information about parts that are ROHS-compliant and/or parts that are non-ROHS-compliant. For example ,
parts with lead (Pb) terminations. Please see the information /tables in this datasheet for details.
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Document No.: 63089
Revision: 28-Mar-2019
CSM Series
Additionally, the overall system cost is often reduced
when a knowledgeable designer concentrates costs in
a few exceptionally stable components whose proven
minimal-deviation 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
Feedback circuits
Power amplifiers
Measurement instrumentation
Precision instrumentation amplifiers
Medical and automatic test equipment
Satellites and aerospace systems
Commercial and Military avionics
Test and measurement equipment
Electronic scales
Figure 2 – Dimensions and Imprinting in inches (millimeters)
H
A
W
B
T
L
CSM2512 DIMENSIONS (1)
e
I
a
d
c
b
CSM2512 LAND PATTERN
E1
E2
I1
I2
Kelvin Connection
I1, I2 - Current
E1, E2 - Sense
I
a
d
c
b
CSM3637 LAND PATTERN
E1
E2
I1
I2
H
A
W
B
T
L
CSM3637 DIMENSIONS
(1)
Dimensions – Tolerances ±0.010 (±0.254),* ±0.015 (±0.381)
MODEL RESISTANCE RANGE (m) L W H T A B
CSM2512
1 to < 5
0.250 (6.350) 0.125 (3.175) 0.025 (0.635)
0.087 (2.210)
0.030 (0.762)* 0.032 (0.813)*5 to < 7 0.047 (1.19 4)
7 to 200 0.030 (0.762)
CSM3637 1 to < 2 0.36 0 (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 0.36 0 (9.144) 0.370 (9.398) 0.025 (0.635) 0.08 6 (2.184) 0.061 (1.549) 0.032 (0.813)
Land Pattern Dimensions – Tolerances ±0.003 (±0.076)
MODEL RANGE a b c d e I
CSM2512
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 0.0 83 (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)
CSM3637 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
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Document No.: 63089
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Table 2 – CSM Series Performance Specifications
TEST CONDITIONS MIL-PRF-49465B
∆R LIMITS
CSM2512/CSM3637
TYPICAL ∆R LIMITS MAXIMUM ∆R LIMITS
Thermal Shock 55°C to +150°C, 1000 cycles,
15 min at each extreme ±(0.5%+0.0005R) 0.1% 0.3%
Load Life Stability 2000 h, 70°C at rated power ±(1.0%+0.0005R) 0.2% 1.0%
Bias Humidity +85°C, 85% humidity
10% bias, 1000 h ±(0.5%+0.0005R) 0.05% 0.2%
Short Time Overload 5 x rated power for 5 s
(See note (3) from table 1) ±(0.5%+0.0005R) 0.1% 0.3%
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%
Moisture Resistance MIL-STD-202, method 106,
0 power, 7a and 7b not required ±(0.5%+0.0005R) 0.02% 0.05%
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%
Solderability MIL-STD-202 95% coverage – –
Figure 3 – Load Life Results of CSM2512
Figure 3 - Thermal Shock Test of CSM2512 and CSM3637
FIGURE 5 LOAD LIFE RESULTS OF CSM3637 FIGURE 6 LOAD LIFE RESULTS OF CSM2512
CSM3637 0R05 Load Life 200HRS @ 2W @ +70C
250 500 1000 2000
1250 4120 500 4480 1000 5640 2000 6930
2250 4650 500 5120 1000 6780 2000 8830
3250 4460 500 5040 1000 6410 2000 8700
4250 4740 500 5840 1000 7610 2000 10490
5250 4610 500 6100 1000 8070 2000 11320
6250 3960 500 5340 1000 7280 2000 9190
7250 4600 500 5740 1000 6940 2000 8640
8250 4800 500 6430 1000 8410 2000 11040
9250 5550 500 7640 1000 10450 2000 13860
10 250 4960 500 6720 1000 9140 2000 11920
11 250 5030 500 6540 1000 9410 2000 11910
12 250 4310 500 5620 1000 8470 2000 10520
13 250 3930 500 5260 1000 6490 2000 7740
14 250 3800 500 5160 1000 6500 2000 7850
15 250 3830 500 5280 1000 6780 2000 8630
AVG 4490.00 5754.00 7625.33 9838.00
FIGURE 7 Pulse Test I FIGURE 8 Pulse Test II
0 250 500 1000 2000
0 4490.00 5754.00 7625.33 9838.00
RC1 RC2 DR
1-4060 -3180 880 1-4060 230813-
2-4120 -3180 940 1-4120 230813-
3-4340 -3740 600 1-4340 230473-
4-4440 -4160 280 1-4440 230614-
5160 520 360 1160 23025
6-3960 -3600 360 1-3960 230063-
7-3880 -3360 520 1-3880 230633-
8-1300 -200 1100 1-1300 23002-
9-2760 -1820 940 1-2760 230281-
10 -1300 -320 980 1-1300 23023-
AVG -3000 -2304 696
MAX 160 520 1100
MIN -4440 -4160 280
1 20
2 20
3 20
4 20
5 20
Figure 4 - Bais Humidity Test of CSM2512 and CSM3637
0 500 1000 1500 2000 2500
12000
9000
6000
3000
0
3000
6000
9000
12000
CSM3637 0R1
Load Life 2000HRS @ 2W @ +70C (15 units)
Time (Hours)
R/R (ppm)
0
5
10
15
20
25
30
35
CSM3637 0R005 Pulse Test - 10 units
( 5 Pules of 5 sec @ 30A,10 sec @ 0A)
Average Resistance deviation: 696ppm
STD=305 ppm, Mesurment Error=0.0005R
Tim e (s e c)
Current (A)
0
5
10
15
20
25
CSM3637 0R005 Pulse Test - 10 units
35 Pules of 0.2msec @ 20A, 0.5 msec @ 3A)
Average Resistance deviation: 13.3ppm
STD=27.3 ppm, Mesurment Error=0.0005R
Tim e (s e c)
Current (A)
0 500 1000 1500 2000 2500
-3000
-2500
-2000
-1500
-1000
-500
0
500
1000
1500
2000
2500
3000
CSM2512 0R05
Load Life 2000HRS @ 1W @ +70C (15 units)
Time (Hours)
R/R (ppm)
5sec 10sec
0.2msec
0.5msec
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Document No.: 63089
Revision: 28-Mar-2019
Figure 4 – Thermal Shock Results of CSM3637 and CSM2512
CSM3637 0R1 CSM3637 0R2 CSM2512 0R1 CSM2512 0R2
–2000
–1500
–1000
–500
0
500
1000
1500
2000
∆R/R (ppm)
Type and Value
Thermal Shock (– 55°C to +150°C) x 1000 Cycles
20 Units Each Type and Value
Figure 5 – Bias Humidity Results of CSM3637 and CSM2512
CSM3637 0R2 CSM3637 0R1 CSM2512 0R1 CSM2512 0R2
–1000
–800
–600
–400
–200
0
200
400
600
800
1000
∆R/R (ppm)
Type and Value
Bias Humidity 1000 Hrs @ +85°C @ 85% RH
10 Units Each Type and Value
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Figure 6 – Pulse Test I
0
5
10
15
20
25
30
35
Current (A)
Time (sec)
5 sec
10 sec
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
Figure 7 – Pulse Test II
0
5
10
15
20
25
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
0.2
msec
Current (A)
Time (msec)
0.5
msec
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Table 3 – Global Part Number Information(1)
Note
(1) For non-standard requests, please contact application engineering.
NEW GLOBAL PART NUMBER: Y14870R12400B0R (preferred part number format)
DENOTES PRECISION VALUE CHARACTERISTICS
YR = Ω 0 = standard
9 = lead (Pb)-free
80 = Loose TCR Tin lead
89 = Loose TCR Lead (Pb)-free
1 to 999 = custom
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
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1487 0R12400 B 0 R:
TYPE: CSM2512
VALUE: 124.0 m Ω
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 0R1240B
BT
MODEL OHMIC VALUE ABS. TOLERANCE TERMINATIONPACKAGING
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
4870124RY1 B00 R0
Vishay Precision Group, Inc.
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Document No.: 63999
Revision: 15-Jul-2014
Disclaimer
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any other disclosure relating to any product.
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