surface mount emi filters surface mount pi filters sbsp signal track signal track signal track signal track width 1.60 (0.063") earth tr ack width 0.80 (0.030") pad spacing 2.0 (0.078") earth track earth track mount on board with ferrite upwards chip soldered to signal track at both ends chip filter chip soldered to earth track both sides signal track side bands provide earth contact points. bands are formed on the sides of the chip only and are not continuous underneath the chip. solder joints must be made to both side bands to ensure effective filtering. a range of miniature surface mount pi-filters is available from syfer technology. in a size of only 1206, it offers an unbeatable combination of size and performance. with a 1a current rating, the sbsp range is available with working voltages up to 100vdc. the use of x7r and c0g ceramic dielectrics allows capacitance values from 22pf to 150nf, making it suitable for both signal and power lines and ensuring impressive emi filtering performance up to 1ghz and higher. ideal for telecoms, power supplies and industrial electronic equipment, the operating temperature range of -55c to 125c ensures they are also suitable for mil/aerospace applications. circuit configuration w t l2 l l1 electrical configuration pi filter capacitance measurement at 1000hr point rated current 1 amp dc operating temperature -55c to 125c dc resistance 0.5 ohms max weight 0.5g typical (0.18oz) dielectric withstand voltage rated voltage dwv 100vdc 250vdc 50vdc 125vdc 25vdc 63vdc ferrite inductance 0.25h mm (inches) l 3.2mm 0.3 (0.126? 0.012?) w 1.6mm 0.3 (0.063? 0.012?) t 1.6mm 0.2 (0.063? 0.008?) l1 0.95 0.3 (0.037? 0.012?) l2 0.5 0.25 (0.020? 0.010?) electrical specifications pi signal track width = 1.60 (0.063") signal pad overall minimum = 3.8 (0.149) pad spacing = 2.00 (0.079) coloured area to be solderable and free from varnish earth track width = 0.80 (0.030") earth pad overall minimum = 2.90 (0.114) recommended pad/track details sbsp mounting information and soldering procedures sm pi chip filter mounted to board and soldered in identical manner to chip capacitor. solder connections made to each end (signal lines) and each side band (earth track). typical insertion loss (db) 50 ohm system no load pi section 0.1mhz 1mhz 10mhz 100mhz 1ghz note #1 t = taped, b = bulk, r = large reel insertion loss figures quoted are for filters mounted within a partition, it should be noted that some degradation will occur a t higher frequencies for filters which are not fully shielded. 000 1 12 000 3 21 000 7 32 0 0 1 13 45 0 0 2 22 58 0053360+ 0094060+ 0 0 11 47 60+ 0 0 14 54 60+ 0 1 19 57 60+ 0 2 24 60+ 60+ 0 5 29 60+ 60+ 0 7 36 60+ 60+ 0 11 42 60+ 60+ 0 14 51 60+ 60+ 1 16 57 60+ 60+ 3 19 60+ 60+ 60+ 5 21 60+ 60+ 60+ 8 23 60+ 60+ 60+ type no. capacitance dielectric rated (20%) code voltage (vd.c.) sbspp1000220mc#1 22pf c0g 100 sbspp1000470mc#1 47pf c0g 100 sbspp1000101mc#1 100pf c0g 100 sbspp1000221mc#1 220pf c0g 100 sbspp1000471mc#1 470pf c0g 100 sbspp1000102mx#1 1nf x7r 100 sbspp 1000152mx#1 1.5nf x7r 100 sbspp 1000222mx#1 2.2nf x7r 100 sbspp 1000332mx#1 3.3nf x7r 100 sbspp 1000472mx#1 4.7nf x7r 100 sbspp 1000682mx#1 6.8nf x7r 100 sbspp 1000103mx#1 10nf x7r 100 sbspp 1000153mx#1 15nf x7r 100 sbspp 0500223mx#1 22nf x7r 50 sbspp 0500333mx#1 33nf x7r 50 sbspp 0500473mx#1 47nf x7r 50 sbspp 0500683mx#1 68nf x7r 50 sbspp 0250104mx#1 100nf x7r 25 sbspp 0250154mx#1 150nf x7r 25 filtsmsbsp.ver1
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