2009 autumn 4v series variable capacitance diode for fm tuning 4v ? fm `?R?` TKV1790AS3 (sot23c-3) features ? included twin element ? ??? 1 Md ? very small tolerance of element being next device to each other ? O??g? ? very low operating voltage: v op =0.5 to 3.0v ? ?R : v op =0.5~3.0v ? excellent linearity of the cv curve ? cv ???? ? extra large capacitance ratio: a=3.15 to ? O??? : a=3.15~ ? very small series resistance: r s =to 0.35 ? ?? : r s =~0.35 selection charts capacitance(pf) capacitance ratio type v r.max (v) min. typ. max. v r (v) min. typ. max. v r (v) rs max c tolerance c max i f (ma) p d (mw) t stg ( c) t op ( c) TKV1790AS3 16 22.50 8.20 25.00 9.30 27.60 10.40 1 4 2.0 2.6 1/4 0.30 @1.0v 470mhz 50 100 -55 to 150 -55 to 85 * capacitance measured in parallel connections. ? back to back type 2 ?`??? * diode capacitance measured with agilent 4279a or equivalent instruments (at osc level 20 5mvrms) y? agilent 4279a ??? osc ? 20 5mvrms * resistance meter is agilent 4291b or equivalent instruments. ??y? agilent 4291b ??? * the tolerance of element that is next to eac h other in same reel is within 3% at c 2 , c 5 and c 8 . ??`?O?? c 2 c 5 c 8 ? 3.0% ? typical charcteristics ? capacitance versus reverse voltage ]?R f=1mhz, t a =25 c ? series resistance versus frequency ??? v r =1.5v, t a =25 c
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