as ahi kasei emd corp oration evaluation board for ak8126 AKD8126 description the akd8 1 2 6 is an evalu a tion boa rd fo r sp rea d spe c trum clo ck g ene rato r, ak8126. the r efore, it is po ssi ble to evaluate spe c trum cha r a c t e ri stics and othe r pe rforman c e s . ordering guide AKD8126 block diagram ak81 26 evaluation board akd0548-e-0 0 jan-08 1
AKD8126 the brand nam e of a k e m d?s ic?s functions figure 1. AKD8126 top view 1. po w e r su ppl y pleas e conn ec t the lead li ne t o vdd (3.3v; red) a nd vss (gnd; black). 2. clock in put it is possible to input clock fro m sma-a conn ector. 3. matchin g resist or matchin g resist or is mounta b l e here if imp e d ance match i ng is necess a r y . 4. clock out put clock out put from ak152 6 le ads to this conn ector. spe c trum anal yzer or oscilloscop e is avail abl e to me asure cl ock per formances b y conn ecting h e r e . jan-08 akd0548-e-0 0 2
AKD8126 the brand nam e of a k e m d?s ic?s 5. dipsw 5.1. mode sel e ction (c / d / of f ) modul atio n mo de is sel e cted b y setti ng this s w itc h . l m h t able 5.1. modulatio n mod e setting c / d / of f mode l d o w n sp re a d m spread off h c e n t e r spr ead 5.2. operatio n cloc k frequenc y ra nge se lectio n (f r1 / f r 0) operatio n freq uenc y ra nge is selecte d b y s e tting this s w itch. l h fr1 fr0 t able 5.2. operation cl ock freque nc y s e tting f r 1 f r 0 input frequ enc y ran ge output freque n c y ran ge l l 16-3 2 m h z 16-3 2 mhz(1 x ) l h 32-6 4 m h z 32-6 4 mhz(1 x ) h l 64-1 2 8 m h z 64-1 28mhz(1 x ) h h 16-3 2 m h z 64-1 28mhz(4 x ) note: ak8 126 o u tputs a i nput frequ enc y x 4, w h e n f r 1 / f r 0= ?hh? is selecte d . 5.3. modul atio n rati o selecti on modul atio n rati o is selecte d b y settin g this sw itc h . l h fr1 fr0 l h t able 5.3. modulatio n ratio set t ing s 1 s 0 c e n t e r spr ead c / d / off = ? h ? d o w n sp re ad c / d / off = ? l ? l l 0 . 5 % - 1 . 0 % l h 0.25 % - 0 . 5 % h l 1 . 0 % - 2 . 0 % h h 1 . 5 % - 3 . 0 % 6. quartz oscillat o r foot pattern epson t o yocom (ma-406) or 49 lea d t y p e quartz osci lla tor is mountab l e . jan-08 akd0548-e-0 0 3
AKD8126 the brand nam e of a k e m d?s ic?s example of spectrum measurement 51m hz, cent er spre ad: 1 .0% jan-08 akd0548-e-0 0 4
7 7 6 6 5 5 4 4 3 3 2 2 1 1 e e d d c c b b a a h33 hole10 h31 hole10 h34 hole10 h37 hole10 h32 hole10 h 2 6 h o l e 1 0 hole03 h10 hole03 h9 hole03 h8 hole03 h7 hole03 h6 h 3 8 h o l e 1 0 h 2 9 h o l e 1 0 h30 ckout h10 hole40 h10 hole41 gnd vdd vdd vdd vdd vdd h 2 7 h o l e 1 0 vdd h11 hole10 t itle size document number rev date: sheet of AKD8126_10pin a 1 1wednesday, january 30, 2008 t itle size document number rev date: sheet of AKD8126_10pin a 1 1wednesday, january 30, 2008 t itle size document number rev date: sheet of AKD8126_10pin a 1 1wednesday, january 30, 2008 gnd gnd 1 vdd 2 3 3 2 1 vdd 1 vdd 3 2 con3 1 1 1 1 1 1 1 2 2 2 2 1 1 1 1 1 1 1 2 2 3 3 cdoff fr1 fr0 vd0 ckout xin xout gnd s1 s0 1 2 1 gnd 1 1 1 1 10uf res_pin 0.1uf m a 4 0 6 _ 8 1 2 6 (not mount) (not mount) (not mount) 1 (not mount) (not mount) (not mount) c1 cap_chip c1 cap_chip c5 cap_pin c5 cap_pin c3 cap_pin c3 cap_pin sw4 sw sw4 sw c6 cap_pin c6 cap_pin c2 cap_chip c2 cap_chip sw1 sw sw1 sw r7 res_pin r7 res_pin r8 100 r8 100 ak8126 new_t msop10_8126 ak8126 new_t msop10_8126 1 2 3 4 5 6 7 8 9 10 u3 sma u3 sma 1 ckin g n d 1 g n d 2 g n d 3 g n d 4 u 1 ( n o t m o u n t ) u 1 ( n o t m o u n t ) 1 4 2 3 sw2 sw sw2 sw r2 res_pin r2 res_pin u2 sma u2 sma 1 ckin g n d 1 g n d 2 g n d 3 g n d 4 sw3 sw sw3 sw c7 cap c7 cap sw5 sw sw5 sw
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