MIC3000 Datasheet, PDF (22/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
APCSET_m ^{= APCSETx + APCLUT(TCOMPm )}
Table _ min≤ T_COMPm ≤ Table _ max
= APCSETx + APCLUT(max)
APCSET_m
T_COMP > Table _ max
(6)
= APCSETx + APCLUT(min)
APCSET_m
T_COMP < Table _ min
If the measured temperature is greater than the maximum
table value, the highest value in each table is used. If the
measured temperature is less than the minimum, the mini-
mum value is used. Hysteresis is employed to further en-
hance noise immunity and prevent oscillation about a table
threshold. Each table entry spans two degrees C. The table
index will not change unless the new temperature average
Micrel
results in a table index beyond the midpoint of the next entry
in either direction. There is therefore 2 to 3°C of hysteresis on
temperature compensation changes. The table index will
never oscillate due to quantization noise as the hysteresis is
much larger than ±1⁄2 LSB.
Byte Addresses
Function
00h–3Fh
APC Look-up Table
40h–7Fh
80h–BFh
I_MOD Look-up Table
IFLT Look-up Table
C0h–FFh
Bias High Alarm Look-up Table
Table 11. Temperature Compensation Look-up Tables,
Serial Address I2CADR + 4_h
M9999-101204
22
October 2004