Ƙananan sikelin diatonic ma'aunin kiɗa ne wanda ya ƙunshi bayanin kula guda bakwai kuma yana bin ƙayyadaddun tsari na duka da rabi matakai, ko tazara. Za a iya gina ƙaramin sikelin diatonic farawa akan kowane bayanin kula, amma koyaushe yana da jerin tazara masu zuwa tsakanin bayanin kula: gabaɗaya, rabi, duka, gabaɗaya, rabi, gabaɗaya, gabaɗaya. Wannan tsari kuma ana kiransa da ƙaramin sikelin dabi'a.A cikin ka'idar kiɗan Yamma, ƙaramin sikelin diatonic ɗaya ne daga cikin ma'auni guda uku da aka fi amfani da su, tare da babban ma'aunin diatonic da ƙaramin ma'aunin jituwa. Ana amfani da shi sau da yawa a nau'o'i kamar blues, rock, da kiɗan gargajiya.