The FRSM is based on the new generation Z1- technology of the Bulk Metal® Precision Foil resistor elements by Vishay Precision Group (VPG), which makes these resistors virtually insensitive to destabilizing factors. Their element, based on the new Z-1 Foil is a solid alloy that displays the desirable bulk properties of its parent material; thus, it is inherently stable (remarkably improved load life stability of 25 ppm), noise-free and withstands ESD to 25KV or more. The alloy is matched to the substrate and forms a single entity with balanced temperature characteristics for an unusually low and predictable TCR over a wide range from -55 C° to more than 175C°. Resistance patterns are photo-etched to permit trimming of resistance values to very tight tolerances.
Temperature coefficient of resistance (TCR): 0.05 ppm/°C typical (0 °C to + 60 °C) 0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
Resistance tolerance: to ± 0.01 %
Power coefficient “DeltaR due to self heating”: 5 ppm at rated power
Power rating: to 750 mW at + 70 °C
Load life stability: ± 0.0025 % at 70 °C, 2000 h at rated power. ± 0.005 % at 70 °C, 10,000 h at rated power.
Resistance Range: 5Ω to 125 kΩ
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 %
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
Voltage coefficient: 0.1 ppm/V
Non inductive: 0.08 µH
Non hot spot design
Terminal finishes available: lead (Pb)-free, tin/lead alloy(1)