DSM
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
to 12 k per resistor
Large variety of resistance ratios: 1:120
Bulk Metal 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)
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Electrostatic discharge (ESD) at least to 25kV
Short time overload: 0.005 %
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: < 0.010 µV
RMS
/V of applied voltage
( - 40 dB)
Voltage coefficient: 0.1 ppm/V
Non inductive: 0.08 µH
Non hot spot design
Terminals: silver coated copper alloy (see Table 5)
Compliant to RoHS directive 2002/95/EC
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vpgsensors.com
For better performances, please see DSMZ datasheet
(Z-Foil)
INTRODUCTION
Bulk Metal
®
Foil (BMF) 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 Foil Resistors (VFR). Products based on this
technology are the most suitable for a wide range of
appilcations.
BMF technology allows the production of 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.
VFR’s application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact
foil@vpgsensors.com.
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
± 2 ppm/°C ± 3 ppm/°C
RESISTANCE
RATIO
R1/R2 = 1
DSM
1 < R1/R2
10
10 < R1/R2
120
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63088
Revision: 12-May-15
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
1
TCR TRACKING
1.0 ppm/°C
2.0 ppm/°C
3.0 ppm/°C
TOLERANCE
ABSOLUTE
± 0.02 %
± 0.05 %
± 0.1 %
MATCH
0.01 %
0.02 %
0.05 %
DSM
FIGURE 2 - POWER DERATING CURVE
110
100
90
80
70
60
50
40
30
20
10
0
- 60 - 40
- 55
Percent of Rated Wattage
FIGURE 3 - 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
- 20
0
20
40
60
70
80
100
120 140
125
- 150
- 200
- 50
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Ambient Temperature (°C)
Ambient Temperature (°C)
FIGURE 4 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 5 - RECOMMENDED LAND
PATTERN
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
0.040 ± 0.004
(1.02 ± 0.1)
Note:
Foil shown in black, etched spaces in white
0.100 ± 0.004
(2.54 ± 0.1)
FIGURE 6 - DIMENSIONS AND IMPRINTING
SIDE VIEW
H
w
FRONT VIEW
L
TH
t
P
P
TW
S
TW
BOTTOM VIEW
1
TOP VIEW
VALUE R1
RATIO TOLERANCE CODE
3
VALUE R2
3
2
STAND OFF
Notes
If the resistance value of R1 and R2
contains more than 6 characters
together, the VCODE will be printed
instead (see Resistance Value Code
List for Popular Ratios Table)
followed by the ratio tolerance code.
(2)
R1—between PIN1 and PIN3
R2—between PIN2 and PIN3.
(1)
TW
10K Q 10K
(1) (2)
B0219
1
DATE CODE
2
DIMENSIONS
INCHES
MILLIMETERS
L
4.06 ± 0.20
W
2.69 ± 0.20
H
1.60 ± 0.20
P
0.79 ± 0.13
TW
0.79 ± 0.10
TH
1.09 ± 0.20
S
2.54 ± 0.20
0.071 ± 0.004
(1.8 ± 0.1)
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
0.13 ± 0.05
www.vishayfoilresistors.com
2
For any questions, contact
foil@vpgsensors.com
Document Number: 63088
Revision: 12-May-15
0.100 ± 0.004
(2.54 ± 0.1)
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
0.035 ± 0.004
(0.89 ± 0.1)
0.063 ± 0.004
(1.6 ± 0.1)
t
DSM
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
Load Life Stability
2000 h at + 70 °C; rated power
Short Time Overload
6.25 x rated power; 5 s
Low Temperature Operation
Weight
TYPICAL LIMITS
Entire package: 0.1 W
Each resistor: 0.05 W
25 V
- 65 °C to + 125 °C
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.015 % (150 ppm)
Ratio
= 0.01 % (100 ppm)
Successfully passed
> 10
4
M
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.02 % (200 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.0025 % (25 ppm)
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.01 % (100 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.005 % (50 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.0025 % (25 ppm)
R
= 0.005 % (50 ppm)
Ratio
= 0.0025 % (25 ppm)
0.04 g
FIGURE 7 - DSM 10K/10K, 20 UNITS, LOAD LIFE
0.05 W each value, at + 70 °C
+ 60
+ 50
+ 40
+ 30
ΔRatio
(ppm)
+ 20
+ 10
0
- 10
- 20
- 30
- 40
- 50
250
500
1000
2000
Time (h)
Document Number: 63088
Revision: 12-May-15
For any questions, contact
foil@vpgsensors.com
www.vishayfoilresistors.com
3
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