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DSMZ (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Bulk Metal ? Z-Foil Surface Mount Voltage
Divider, TCR Tracking of < 0.1 ppm/°C , PCR of ± 5 ppm
at Rated Power and Stability of ± 0.005 % (50 ppm)
FEATURES
? Temperature coefficient of resistance (TCR): ?
Absolute: ± 0.05 ppm/°C typ. (0 °C to + 60 °C) ?
± 0.2 ppm/°C typ. (- 55 °C to + 125 °C, + 25 °C Ref.) ?
Tracking: 0.1 ppm/°C typical
ABSOLUTE TOLERANCE ? ± 0.02 %, ± 0.05 %, ± 0.1 %
0.01 %, 0.02 %, 0.05 %
TCR
- 55 °C to + 125 °C ?
For R1/R2 = 1 0.5 ppm/°C
? Differential amplifiers
?
Ratio arms in bridge circuits
INTRODUCTION
Bulk Metal ? Z-Foil technology out-performs all other resistor
technologies available today for applications that require
ultra-high precision and ultra-high stabilitly.
The Z-Foil technology provides a significant reduction of the
resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
The DSMZ offers low TCR (both absolute and tracking), low
PCR, excellent load life stability, tight tolerance match,
excellent ratio stability, low thermal EMF, and low current
noise - all in one package.
The DSMZ surface mount divider provides a matched pair of
Bulk Metal ? Z-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.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
TABLE 1 - RESISTANCE VALUES AND
TOLERANCES (1)
RESISTANCE VALUES 100 ? to 10 k ? per resistor (2)
EACH RESISTOR
RESISTANCE
TOLERANCE MATCH
Absolute: (typical and maximum
spread): ± 0.2 ± 2.0 ppm/°C
Tracking: (maximum)
(+ 25 °C reference)
For 1 < R1/R2 ? 10 1.0 ppm/°C
For 10 < R1/R2 ? 100 2.0 ppm/°C
Notes
(1) Tighter performances are available
(2) 100 ? to 12 k ? per resistor available in DSM
FIGURE 1 - SCHEMATIC
? Power coefficient tracking ?
“ ? R due to self heating”: ± 5 ppm at rated power
? Power rating at 70 °C: entire package: 0.1 W, ?
each resistor: 0.05 W
? Tolerance: absolute: ± 0.02 %; match: 0.01 %
? Ratio stability: 0.005 % (0.05 W at 70 °C, 2000 h)
? Resistance range: 100 ? to 10 k ? per resistor
? Large variety of resistance ratios: 1:100
? 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
? Thermal EMF: 0.05 μV/°C typical
? 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 contact application
engineering
APPLICATIONS R 2
? Instrumentation amplifiers
? Bridge networks R 1
Vin -
Vout
+
? Medical and test equipment DSMZ
? Military
? Airborne etc.
FIGURE 2 - POWER DERATING CURVE
110
100
90
80
70
60
50
40
30
20
R 1
OPTION 1
SAME OHMIC VALUE,
SAME ABSOLUTE TOLERANCE
R 2
OPTION 2
RESISTOR PAIR
R 1 /R 2 - DIFFERENT VALUES
10
0
- 60 - 40
- 55
- 20
0 20 40 60 80
70
Ambient Temperature (°C)
100
120
125
140
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63121
Revision: 4-Feb-13
For any questions, contact: foil@vishaypg.com
www.vishayfoilresistors.com
1
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