Passive Components


Current sense chip resistors

4 March 2009 Passive Components

Vishay recently introduced the new VCS1625Z ultra high-precision Z-Foil surface-mount current sensing chip resistor.

The new device provides an industrial-grade absolute TCR of ±0,05 ppm/°C from 0°C to +60°C and ±0,2 ppm/°C from


-55°C to +125°C, power coefficient (DR due to self heating) of ±5 ppm at rated power, and a tolerance of ±0,2%. The resistor features load-life stability of ±0,02% at +70°C for 2000 hours at rated power.

The VCS1625Z offers a 0,5 W power rating at +70°C, current noise lower than


-40 dB and thermal EMF of 0,05 μV/°C. The resistor features a non-inductive (<0,08 μH), non-capacitive design, and a 4 Kelvin connection for increased accuracy.

While other resistor technologies can take several seconds or even minutes to achieve a steady state thermal stabilisation, the VCS1625Z has an almost instantaneous thermal stabilisation time, and a short 1,0 ns rise time without ringing. Optimised for military and space applications according to EEE-INST-002 and MIL-PRF 55342 screening, the resistor is built to handle unconventional environmental conditions with minimal drift.

The VCS1625Z withstands electrostatic discharges exceeding 25 kV for increased reliability. Offered in tape-and-reel or waffle packaging, the device is available with gold, lead-free or tin/lead terminations.

Typical applications include precision current sensing, switching and linear power supplies, weigh scales, feedback circuits, precision voltage dividers, power management systems, and amplifiers in test and measurement instrumentation; laboratory, medical and weapons systems; electron beam applications; satellites and aerospace systems; and commercial and military avionics.

For more information contact Marian Ledgerwood, Future Electronics, +27 (0)21 421 8292, marian.ledgerwood@futureelectronics.com, www.futureelectronics.com



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