microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 1 rohs compliant copyright ? 2005 rev: 2010-02-03 umx5601 ultra low magnetic moment pin diode for mri applications www. microsemi .com description the umx5601 tm pin diode series was designed to provide ultra low magnetic pin diodes for in bore surface coil applications associated with higher field strength (3t and greater) mr scanners. these pin di odes produce the minimum artifacts (magnetic field distortions) available in the industry, today. the diodes have been tested in magnetic fields of 7 tesla . the umx5601 pin diodes have a magnetic moment at 7 t of 4e-8 (j/t). the diodes are offered in a surface mount package. the sm package utilizes a round end cap to mark the anode. the ca thode is square. the fully passivated pin diode chip is full face metallurgically bonded to shortened high conductive pins for lower thermal and electrical resistances. t he pin diodes feature low forward bias resistance and high zero bias impe dance. the umx5601 pin diodes are characterized at 64, 128, and 300 mhz. the UMX5601SM meets rohs requirements per eu directive 2002/95/ec. important: for the most current data, consult our website: www.microsemi.com absolute maximum ratings at 25o c (unless otherwise specified) rating symbol value unit peak repetitive reverse voltage working peak reverse voltage dc blocking voltage v rrm v rwm v r 100 100 100 v rms reverse voltage v r (rms) 75 v storage temperature t stg -65 to +175 oc operating temperature non-repetitive peak t op -65 to +150 oc thermal characteristics (unless otherwise specified) thermal resistance symbol value unit UMX5601SM 2 oc/watt key features ? ultra low magnetic construction ? sogo passivated chip ? thermally matched configuration ? rohs compliant 1 ? low capacitance at 0 v bias ? low conductance at 0 v bias ? metallurgical bond ? fused-in-glass construction ? non cavity design ? available in surface mount package. ? compatible with automatic insertion equipment 1- these devices are supplied with silver terminations. other terminal finishes may be av ailable on request. consult factory for details. applications/benefits ? high b field (3t+) in bore applications: ? active or semi-active (not passive) ? mr blocking circuits ? mr detuning circuits ? mr disable circuits ? mr receiver protector circuits u u m m x x 5 5 6 6 0 0 1 1
microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 2 rohs compliant copyright ? 2005 rev: 2010-02-03 umx5601 ultra low magnetic moment pin diode for mri applications www. microsemi .com electrical parameters @ 25 ? c (unless otherwise specified) parameter symbol conditions min typ. max units forward voltage v f i f = 100 ma 0.75 1.0 v reverse break down voltage v br i r = 10 ua 100 v reverse current i r v r = 100 v 10 ua inductance ls 900 ph magnetic moment m @ 7t @ 1t 4e-8 1e-7 j/t j/t mass susceptibility @ 7t @ 1t -3.3e-11 6.5e-10 m 3 /kg m 3 /kg volume susceptibility >1t to 7t <1t -3.1e-7 5.9e-6 si si v r = 0 v, f = 1 mhz 9 10 capacitance c t v r = 50 v, f = 1 mhz 2.6 3.0 pf v r = 0 v, f = 64 mhz 5 9 parallel resistance r p v r = 30 v, f = 64 mhz 100 250 k ? series resistance r s if = 100 ma f = 64 mhz 0.3 0.5 ? lifetime if = 10 ma 5 10 us e e l l e e c c t t r r i i c c a a l l s s
microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 3 rohs compliant copyright ? 2005 rev: 2010-02-03 umx5601 ultra low magnetic moment pin diode for mri applications www. microsemi .com magnetic moment vs field c-v curves -3.0e-07 -2.0e-07 -1.0e-07 0.0e+00 1.0e-07 2.0e-07 3.0e-07 -10.0 -5.0 0.0 5.0 10.0 field (t) magnetic moment (j/t) 0 10 1 10 2 10 vr (v) 0 1 2 3 4 5 6 7 8 9 10 ct (pf) umx5601 typical 1 mhz 64, 128, & 300 mhz rp ? parallel resistance rs vs if 0 5 10 15 20 25 30 35 40 45 50 vr (v) 3 10 4 10 5 10 6 10 rp (ohms) umx5601 typical 64 mhz 128 mhz 300 mhz -1 10 0 10 1 10 2 10 if (ma) -1 10 0 10 1 10 2 10 rs (ohms) umx5601 typical 64, 100, 128 & 300 mhz g g r r a a p p h h s s
microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 4 rohs compliant copyright ? 2005 rev: 2010-02-03 umx5601 ultra low magnetic moment pin diode for mri applications www. microsemi .com vf vs if sm style solder footprint notes: 1. these dimensions will ma tch the terminals and provide for additional solder fillets at the outboard ends at least as wide as the termi nals themselves, assuming accuracy of device placement within .005 inches. 2. if the mounting method chosen requires use of an adhesive separate from the solder compound, a round (or square) spot of cement as shown should be centrally located. dimensions shown are in inches ?sm? style package outline dimensions shown are in inches m m e e c c h h a a n n i i c c a a l l
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