VISHAY DSM Technical data
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
Any value at any ratio available within resistance range
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
The electrical specification of this integrated construction
offers improved performance and better real estate utilization
over discrete resistors and matched pairs.
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
SAME ABSOLUTE TOLERANCE
®
Foil Resistors in a small epoxy molded package.
OPTION 1
SAME OHMIC VALUE,
R
1
R
2
OPTION 2
RESISTOR PAIR
R1/R2 - DIFFERENT VALUES
• 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 hours)
• Resistance Range: 100 Ω to 20 kΩ per resistor
• Large Variety of Resistance Ratios: 1:200
• Electrostatic Discharge (ESD) above 25 000 Volts
• Short Time Overload ≤ 0.005 %
• Non Inductive, Non Capacitive Design
• Rise Time: 1.0 ns without 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
• Any value available within resistance range (e.g. 1K2345)
• Prototype samples available from 48 hours. For more
information, please contact foil@vishay.com
• For better performances, please see DSMZ datasheet
(Z-Foil)
APPLICATIONS
• Instrumentation amplifiers
• Bridge networks
• Differential amplifiers
• Ratio arms in bridge circuits
• Medical and test equipment
• Military
• Airborne etc.
R
ODUC
R
2
R
1
Vin
-
+
DSM
Pb-free
Available
RoHS*
T
Vout
DSM
TABLE 1 - MODEL DSM SPECIFICATIONS
MODEL
(- 55 °C TO + 125 °C, + 25 °C REF.)
MPROVED P
ABSOLUTE TCR
TYPICAL + MAX. SPREAD
I
DSM ± 2 ppm/°C ± 3 ppm/°C
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63088 For any questions, contact: foil@vishay.com
Revision: 05-Jun-07 1
RESISTANCE
RATIO
R1/R2 = 1 1.0 ppm/°C ± 0.02 % 0.01 %
1 < R1/R2 ≤ 10 2.0 ppm/°C ± 0.05 % 0.02 %
10 < R1/R2 ≤ 200 3.0 ppm/°C ± 0.1 % 0.05 %
TCR TRACKING
ABSOLUTE MATCH
TOLERANCE
www.vishay.com
DSM
f
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)
FIGURE 2 - POWER DERATING CURVE
110
100
90
80
70
60
50
Rated Wattage
40
30
20
10
Percent o
0
- 60 - 40 - 20 0 20 40 60 80 100 120 70140
- 55
FIGURE 4 - TRIMMING TO VALUES
Interloop Capacitance
Reduction in Series
Mutual Inductance
Reduction due
to Change in
Current Direction
Ambient Temperature (°C)
(Conceptual Illustration)
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note: Foil shown in black, etched spaces in white
125
Current Path
FIGURE 3 - RECOMMENDED LAND
0.063 ± 0.004
(1.6 ± 0.1)
(0.89 ± 0.1)
(1.02 ± 0.1)
0.040 ± 0.004
0.100 ± 0.004
0.035 ± 0.004
(2.54 ± 0.1)
FIGURE 5 - TYPICAL TCR CURVE
(For more details, see table 1)
+ 150
∆
R
R
(ppm)
+ 100
+ 50
0
- 50
- 100
- 150
- 200
- 50 - 25 0 + 25 + 50 + 75 + 100 + 125
- 55
Ambient Temperature (°C)
± 2 ppm/°C
(+ 25 °C reference)
(1.8 ± 0.1)
(2.54 ± 0.1)
0.100 ± 0.004
0.071 ± 0.004
T
FIGURE 6 - DIMENSIONS AND IMPRINTING
w
H
TH
BOTTOM VIEW
3
TW
MPROVED PRODUC
I
DIMENSIONS L W H P TW TH S t
INCHES 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
MILLIMETERS 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
www.vishay.com For any questions, contact: foil@vishay.com Document Number: 63088
2 Revision: 05-Jun-07
STAND OFF
t
PP
TOP VIEW
1
2
Note:
R1 - between PIN1 and PIN3
R2 - between PIN 2 and PIN3
VAL UE R1
WEIV TNORFWEIV EDIS
RATIO TOLERANCE CODE
1 2
TW
3
10K Q 10K
V B0219
DATE CODE
L
TW
S
VAL UE R2
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