SMD Resistor for Medical Electronics. Accurate and stable instrumentation in the medical field requires the ability to detect very small signals without producing false readings. For the complement of chip resistors surrounding the operational amplifier and anywhere else resistors are needed in medical applications, the preferred choice of device is Vishay Foil.

Customer Requirements

● Reliable measurements of motor control are necessary to perform injections at the precise location

● High speed response necessary to perform given task

● Low sensitivity to short-time overload

● Surface mount to preserve limited real estate

● 4 pad Kelvin connection desired as a way to improve accuracy

Key Benefits

● Temperature coefficient of resistance (TCR):
❍ ±0.05 ppm/ºC (0ºC to +60ºC) typical with Z-Foil
❍ ±0.2 ppm/ºC (-55ºC to +125ºC, +25ºC ref.) typical with Z-Foil

● Resistance tolerance to ±0.01%

● Power Coefficient of Resistance (PCR) “∆R due to self heating”: 5 ppm at rated power with Z-Foil

● Electrostatic discharge (ESD) at least to 25 kV

● Overload Capability (6.25 X rated power, 5 seconds) <0.005% (50 ppm)

● Rise Time: 1 ns without ringing

● Structure and process provides low sensitivity to moisture

● Non-inductive, non-capacitive image design

● Current noise: 0.010 μVRMS/V of applied voltage (<-40 dB)

● Thermal stabilization time <1s (nominal value achieved within 10 ppm of steady state value)

● Matched sets are available upon request

● Vishay Foil resistors are not restricted to standard values; specific “as required” values can be supplied at no extra cost or delivery (e.g. 1K2345 vs. 1K)

● Lead (Pb) free, gold and tin/lead terminations available