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)
DSM
Vishay Foil Resistors
Document Number: 63088
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
Revision: 22-Apr-2013
1
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@vishaypg.com
.
FIGURE 1 - SCHEMATIC
OPTION 1
SAME OHMIC VALUE,
SAME ABSOLUTE TOLERANCE
R
1
OPTION 2
RESISTOR PAIR
R
1
/R
2
- DIFFERENT VALUES
R
2
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: to 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
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)
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@vishaypg.com
For better performances, please see DSMZ datasheet
(Z-Foil)
TABLE 1 - MODEL DSM SPECIFICATIONS
MODEL
ABSOLUTE TCR
(- 55 °C TO + 125 °C, + 25 °C REF.)
TYPICAL + MAX. SPREAD
RESISTANCE
RATIO
TCR TRACKING
TOLERANCE
ABSOLUTE
MATCH
DSM
± 2 ppm/°C ± 3 ppm/°C
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
120
3.0 ppm/°C
± 0.1 %
0.05 %
* Pb containing terminations are not RoHS compliant, exemptions may apply