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Vishay’s New VFCD1505Ultra-High-Precision Z-Foil Surface-Mount Flip Chip Voltage Divider Combines a Low Absolute TCR of ±0.05 ppm/°C, TCR Tracking of 0.1 ppm/°C, Load Life Stability Ratio of 0.005 %, and PCR Tracking of 5 ppm at Rated Power
Device Features Tolerance Matching Down to ±0.005 % (50 ppm) and ESD Protection Above 25000 V
MALVERN, Pa. — May 14, 2008 — Vishay Intertechnology, Inc. (NYSE: VSH) announces the new VFCD1505 surface-mount flip chip voltage divider, which provides a low absolute TCR of ±0.05 ppm/°C from 0 °C to +60 °C and ±0.2 ppm/°C from −55 °C to +125 °C, +25 °C Ref., an excellent PCR tracking (“ΔR due to self heating”) of ±5 ppm at rated power, and a load life stability ratio of ±0.005 %.
The VFCD1505 provides tight tolerance matching of ±0.01 % (available down to ±0.005 %) and TCR tracking of 0.1 ppm/°C between two resistors simultaneously etched on one piece of foil on a common substrate. For designers, the electrical specifications of this integrated construction offer improved performances and better real estate utilization over discrete resistors and matched pairs.
The new voltage divider is built on Vishay’s breakthrough “Z- foil” technology, which provides a significant reduction of the resistive component’s sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). Z-Foil improves stability by an order of magnitude compared to any other resistor technology, allowing designers to guarantee a high degree of accuracy in fixed-resistor applications.
Applications for the new device include high-precision instrumentation amplifiers, bridge networks, differential amplifiers, and ratio arms in bridge circuits for ultra-stable and high-reliability products, such as medical, test, and military equipment. Screening in accordance with EEE-INST-002 is available (MIL-PRF 55342).
The VFCD1505 has a load-life stability ratio of ±0.005 % for 2000 hours at +70 °C; a power rating of 0.1 W at +70 °C (divided between the two resistors proportionally to their value); a low voltage coefficient of < 0.1 PPM/V; current noise of <-40 dB; and thermal EMF of 0.05 μV/ °C. It offers a fast rise time of 1.0 ns without ringing and features a non-inductive (< 0.08 μH), non-capacitive design.
The device offers the utmost in ESD immunity, withstanding electrostatic discharges exceeding 25 kV, for increased reliability. Within a resistance range of 1 K to 10 K, any value at any tolerance is available through calibration.
Samples and production quantities of the VFCD1505 voltage divider are available now, with lead times of 72 hours for samples, and three weeks for standard orders.
Vishay Precision Group Inc. has ceased to be a subsidiary of Vishay Intertechnology Inc. and is an independent publicly owned company.