Medical Electronics Equipments

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

 

Series	Product	Description	Resistance Range	Tolerance	TCR ppm/°C	Rated Power @70°C	Datasheet
CSM2512 & CSM3637		Metal strip chip resistor	1mΩ to 200mΩ	±0.1% to ±1%	±15	Up to 3W
CSM2512S &CSM3637S		Current sensing chip resistor	10mΩ to 100mΩ	±0.1% to ±1%	±15	Up to 2W
CSM3637P		Improved power metal strip resistor	3mΩ to 100mΩ	±0.1% to ±1%	±15	Up to 5W
CSM3637Z		Current sensing chip resistor	3mΩ to 50mΩ	±0.1%	±5	Up to 3W
VCS1610		4-terminal Current sensing chip resistor	0.1Ω to 1Ω	±0.5% to ±1%	±2	0.25W
VCS1610Z		4-terminal Current sensing chip resistor	0.3Ω to 1Ω	±0.5% to ±1%	±0.2	0.25W
VCS1625		4-terminal Current sensing chip resistor	10mΩ to 10Ω	±0.5% to ±2%	±2	0.5W
VCS1625P		Z-foil current sensing chip resistor	10mΩ to 10Ω	±0.1% to ±2%	±2	1W
VCS1625Z		Z-foil current sensing chip resistor	0.3Ω to 10Ω	±0.2% to ±2%	±0.2	0.5W
VCS1625ZP		Z-foil current sensing chip resistor	0.3Ω to 10KΩ	±0.2% to ±2%	±0.2	1W
VPR220S & VPR221S		TO-220 power resistor (2/4-terminal)	5Ω to 10KΩ	±0.01% to ±1%	±2	8W on heat sink,1.5W in free air
VPR220SZ &VPR221SZ		TO-220 precision power resistors (2/4-terminal)	5Ω to 10KΩ	±0.01% to ±1%	±0.2	8W on heat sink,1.5W in free air
VCS201, VCS202		Conformally Coated Precision Current Sensing Resistors	5mΩ to 0.2Ω	±0.1% to ±5%	±10	1.5W to 2W
VCS232		Power current sensing resistor	0.2Ω to 500Ω	±0.02% to ±5%	±2	2W
VCS232Z		Power current sensing resistor	0.25Ω to 500Ω	±0.02% to ±1%	±0.2	2W
VCS301, VCS302		4-Terminal power current sensing resistor	5mΩ to 0.25Ω	±0.5% to ±5%	±3	10W on heat sink,3W in free air
VCS331, VCS332		4-Terminal power current sensing resistor	0.25Ω to 500Ω	±0.1% to ±5%	±1	10W on heat sink,3W in free air
VFP3, VFP4		Molded Power Current Sensing Resistors	50mΩ to 80KΩ	±0.01% to ±5%	±2	10W on heat sink,3W in free air
VHP3, VHP4, VPR247		Hermetically Sealed Molded Power Current Sensing Resistors	50mΩ to 80KΩ	±0.01% to ±5%	-	10W on heat sink,3W in free air
DSM		SMD molded voltage divider	100Ω to 20KΩ	±0.01% to ±0.05%	±2	0.05W per element
DSMZ		SMD molded voltage divider	100Ω to 10KΩ	±0.01% to ±0.05%	±0.2	0.05W per element
SMN		4- Resistor Network Dual-In-Line Molded Package 50 MIL Pitch	100Ω to 20KΩ	±0.01% to ±0.05%	±2	0.1W per element
SMNZ		4-Resistor Surface Mount Network Dual-In-Line Molded Package	100Ω to 10KΩ	±0.01% to ±0.05%	±0.2	0.1W per element