DSM
Vishay Foil Resistors
High Precision Bulk Metal
®
Foil Surface Mount Voltage Divider,
TCR Tracking of < 0.5 ppm/°C, Tolerance Match of 0.01 %
and Stability of ± 0.005 % (50 ppm)
FEATURES
•
Temperature coefficient of resistance (TCR):
Absolute: ± 2 ppm/°C typical
(- 55 °C to + 125 °C, + 25 °C ref.)
Tracking: 0.5 ppm/°C typical
•
Tolerance: absolute: ± 0.02 %; match: 0.01 %
•
Power rating at 70 °C: entire package: 0.1 W
each resistor: 0.05 W
•
Ratio stability: 0.005 % (0.05 W at 70 °C, 2000 h)
•
Resistance range: 100
Ω
to 12 kΩ per resistor
•
Large variety of resistance ratios: 1:120
•
Vishay Foil resistors are not restricted to standard
values/ratios; specific “as required” values/ratios can be
supplied at no extra cost or delivery (e.g. 1K234/2K345 vs.
1K/2K)
•
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: < - 40 dB
•
Voltage coefficient: < 0.1 ppm/V
•
Non inductive: < 0.08 µH
•
Non hot spot design
•
Terminals: silver coated copper alloy
•
Compliant to RoHS directive 2002/95/EC
•
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishaypg.com
•
For better performances, please see DSMZ datasheet
(Z-foil)
INTRODUCTION
Bulk Metal
®
foil technology out-performs all other resistor
technologies available today for applications that require high
precision and high stability.
This technology has been invented, patented and pioneered
by Vishay. Products based on this technology are the most
suitable for a wide range of appilcations.
BMF technology allows to produce customer oriented
products designed to satisfy challenging and specific
technical requirements. Model DSM offers low TCR (both
absolute and tracking), excellent load life stability, tight
tolerance, excellent ratio stability, and low current noise, all in
one package.
The DSM surface mount divider provides a matched pair of
Bulk Metal foil resistors in a small epoxy molded package.
The electrical specification of this integrated construction
offers improved performance and better real estate utilization
over discrete resistors and matched pairs.
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Our application engineering department is available to advise
and make recommendations. For non-standard technical
requirements and special applications, please contact us.
FIGURE 1 - SCHEMATIC
R
1
R
2
OPTION 1
SAME OHMIC VALUE,
SAME ABSOLUTE TOLERANCE
OPTION 2
RESISTOR PAIR
R
1
/R
2
- DIFFERENT VALUES
TABLE 1 - MODEL DSM SPECIFICATIONS
MODEL
ABSOLUTE TCR
(- 55 °C TO + 125 °C, + 25 °C REF.)
TYPICAL + MAX. SPREAD
RESISTANCE
RATIO
R1/R2 = 1
DSM
± 2 ppm/°C ± 3 ppm/°C
1 < R1/R2
≤
10
10 < R1/R2
≤
120
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63088
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
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APPLICATIONS
•
•
•
•
•
•
•
Instrumentation amplifiers
Bridge networks
Differential amplifiers
Ratio arms in bridge circuits
Medical and test equipment
Military
Airborne etc.
R
1
Vin
-
Vout
+
DSM
R
2
TOLERANCE
TCR TRACKING
1.0 ppm/°C
2.0 ppm/°C
3.0 ppm/°C
ABSOLUTE
± 0.02 %
± 0.05 %
± 0.1 %
MATCH
0.01 %
0.02 %
0.05 %
DSM
Vishay Foil Resistors
FIGURE 2 - POWER DERATING CURVE
110
100
90
80
70
60
50
40
30
20
10
0
- 60 - 40
- 55
FIGURE 3 - RECOMMENDED LAND
0.063 ± 0.004
(1.6 ± 0.1)
0.040 ± 0.004
(1.02 ± 0.1)
Percent of Rated Wattage
- 20
0
20
40
60
70
80
100
120 140
125
Ambient Temperature (°C)
FIGURE 4 - TRIMMING TO VALUES
(Conceptual Illustration)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
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Note:
Foil shown in
black,
etched spaces in
white
FIGURE 6 - DIMENSIONS AND IMPRINTING
SIDE VIEW
H
w
TH
t
P
P
BOTTOM VIEW
1
TW
3
2
STAND OFF
Note:
R1 - between PIN1 and PIN3
R2 - between PIN2 and PIN3
DIMENSIONS
INCHES
MILLIMETERS
L
W
H
0.160 ± 0.008 0.106 ± 0.008 0.063 ± 0.008 0.031 ± 0.005 0.031 ± 0.004 0.043 ± 0.008 0.100 ± 0.008 0.005 ± 0.002
4.06 ± 0.20
2.69 ± 0.20
1.60 ± 0.20
0.79 ± 0.13
0.79 ± 0.10
1.09 ± 0.20
2.54 ± 0.20
0.13 ± 0.05
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For any questions, contact:
foil@vishaypg.com
PR
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0.100 ± 0.004
(2.54 ± 0.1)
0.035 ± 0.004
(0.89 ± 0.1)
FIGURE 5 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
(For more details, see table 1)
+ 150
+ 100
Δ
R
+ 50
± 2 ppm/°C
(+ 25 °C reference)
0
R
(ppm)
- 50
- 100
- 150
- 200
- 50
- 55
- 25
0
+ 25
+ 50
+ 75
0.071 ± 0.004
(1.8 ± 0.1)
+ 100
Ambient Temperature (°C)
FRONT VIEW
L
TW
S
TW
TOP VIEW
VALUE R1
RATIO TOLERANCE CODE
3
VALUE R2
10K Q 10K
V B0219
1
DATE CODE
2
P
TW
TH
S
Document Number: 63088
Revision: 25-Mar-10
0.100 ± 0.004
(2.54 ± 0.1)
+ 125
t
DSM
Vishay Foil Resistors
TABLE 3 - PERFORMANCE SPECIFICATIONS
(Test Method Per MIL-PRF-914)
SPECIFICATIONS
Power Rating
at 70 °C
Maximum Working Voltage
(each resistor)
Working Temperature Range
Thermal Shock
25 x (- 65 °C to + 125 °C)
Thermal Shock
5 x (- 65 °C to + 125 °C) and
Power Conditioning
1.5 rated power at 25 °C, 100 h
DWV
atmospheric pressure, 200 V (A.C.), 1 min
Insulation Resistance
100 V (D.C.), 1 min
Resistance to Soldering Heat
Moisture Resistance
+ 65 °C to - 10 °C; 90 % to 98 % RH; 0.1 x rated power, 240 h
Shock (Specified Pulse)
100 G
Vibration, High Frequency
(10 Hz to 2000 Hz), 20 G
High Temperature Exposure
100 h at 125 °C
Low Temperature Storage
24 h at - 65 °C
Entire package: 0.1 W
Each resistor: 0.05 W
TYPICAL LIMITS
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Load Life Stability
2000 h at + 70 °C; rated power
Short Time Overload
6.25 x rated power; 5 s
Low Temperature Operation
Weight
+ 60
+ 50
+ 40
+ 30
+ 20
FIGURE 7 - DSM 10K/10K, 20 UNITS, LOAD LIFE
0.05 W each value, at + 70 °C
ΔRatio
(ppm)
+ 10
0
- 10
- 30
- 40
- 50
- 20
250
500
Document Number: 63088
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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25 V
- 65 °C to + 125 °C
ΔR
= 0.01 % (100 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.015 % (150 ppm)
ΔRatio
= 0.01 % (100 ppm)
Successfully passed
> 10
4
MΩ
ΔR
= 0.01 % (100 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.02 % (200 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.0025 % (25 ppm)
ΔR
= 0.01 % (100 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.01 % (100 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.005 % (50 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.0025 % (25 ppm)
ΔR
= 0.005 % (50 ppm)
ΔRatio
= 0.0025 % (25 ppm)
0.04 g
1000
2000
Time (h)
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