INTRODUCTION
Bulk Metal
resistor technologies available today for applications that
require ultra high precision and ultra high stability.
The new Z-Foil technology provides a significant reduction
of the resistive element’s sensitivity to changes of
temperature due to ambient temperature variations (TCR)
and to self heating when power is applied (power
coefficient).
Model VFCD1505 offers low TCR (both absolute and
tracking), excellent load life stability, tight tolerance,
excellent ratio stability, low thermal EMF and low current
noise, all in one package. 0.05 ppm/°C absolute TCR
removes errors due to temperature gradients.
The VFCD1505 surface mount divider provides tight
tolerance matching and TCR tracking between 2 resistors
simultaneously etched on one piece of foil on a common
substrate. The electrical specifications of this integrated
construction offers improved performances 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.
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63109
Revision: 25-Mar-10
FIGURE 1 - POWER DERATING CURVE
FIGURE 2 -SCHEMATIC
High Precision Bulk Metal
100
75
50
25
TCR Tracking of < 0.5 ppm/°C, Tolerance Match of 0.01 %
0
- 75
®
Z-Foil (BMZF) technology out-performs all other
- 55 °C
- 50
- 25
Ambient Temperature (°C)
0
R1
+ 25 + 50
and Stability of ± 0.005 % (50 ppm)
+ 70 °C
+ 75 + 100 + 125 + 150 + 175
R2
Bottom View
For any questions, contact:
®
Foil Surface Mount Voltage Divider,
FEATURES
Temperature coefficient of resistance (TCR):
Resistance range: 1K to 10K
Foil resistors are not restricted to standard values/ ratios,
Power coefficient tracking: ”R due to self heating”
Short time overload: ± 0.005 %
Tolerance: absolute and resistance ratio: to 0.01 %
Load life stability (0.1 W at 70 °C, 2000 h)
Electrostatic discharge (ESD) up to 25 000 V
Power rating at 70 °C: entire package: 0.1 W, divided
Non-inductive, non-capacitive design
Thermal EMF: 0.05 µV/°C typical
Current noise: < - 40 dB
Rise time: 1 ns effectively no ringing
Non inductive: < 0.08 µH
Voltage coefficient: < 0.1 ppm/V
Non hot spot design
Compliant to RoHS directive 2002/95/EC
Terminal finish: lead (Pb)-free or tin/lead alloy
For better performances please contact us
Prototypes quantities available in just 5 working days
APPLICATIONS
Instrumentation amplifiers
Bridge networks
Differential amplifiers
Ratio arms in bridge circuits
Medical and test equipment
Military
Airborne etc.
foil@vishaypg.com
absolute: (table 1)
± 0.05 ppm/°C (typical 0 °C to + 60 °C)
± 0.2 ppm/°C (typical - 55 °C to + 125 °C,
+ 25 °C ref.)
Tracking: (table 1)
0.1 ppm/°C typical
specific “as required” values/ratios may be supplied at no
extra cost or delivery (e.g 2K234/5K456)
5 ppm at rated power
Absolute: 0.01 %
Ratio: 0.005 %
between the two resistors proportionally to their value
or sooner. For more information, please contact
foil@vishaypg.com
VFCD1505 (Z-Foil)
Vishay Foil Resistors
Vin
R
1
www.foilresistors.com
-
+
R
2
VFCD1505
Vout
1