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关于REF200的power supply问题请教工程师

Other Parts Discussed in Thread: REF200, OPA602

DataSheet里面Features第一条说:COMPLETELY FLOATING:No Power Supply or Ground Connections.但我做Figure4(a)里面的200uA电流源时,

发现除了6脚(SUBSTRATE)要接-Vs(我用的-5V)之外,还必须3脚(Mirror Common)接地,然后在High Side接上+Vs才能得到精确的200uA。想问下REF200正确的供电方式是怎样?供电范围是多少?Vs可以加到超过18V吗?(因为做想后面Figure10中N+1倍电路,那里面的OPA602需要Vs更高)