Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 41)

AN93
Rev. 1.3 41
Figure 16. Typical Loop Current LCS Transfer Function
Table 32. Loop Current Transfer Function
LVCS[4:0] Condition
00000 Insufficient line current for normal operation.
00001 Minimum line current for normal operation.
11111 Loop current overload. Overload is defined as 128 mA or more, except
in TBR21, where overload is defined as 56 mA or more.
0
32
64
96
128
160
192
224
256
0 16 32 48 64 80 96 112 128 144
Loop Curr e nt (m A)
LC
S
B
it
s
ILIM = 1
ILIM = 0