mic3002 Micrel Semiconductor, mic3002 Datasheet - Page 19

• Manufacturer Part Number: mic3002
• Description: Mic3002 Fom Management Ic With Internal Calibration
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
July 2007
Note:
1. Assumes typical VREF value of 1.22V.
Temperature Reading Compensation
The sensed temperature by the MIC3002 can be
temperature compensated and converted to the optical
module case temperature to be monitored or used for
modulation and other parameters (L.U.T.s). There are 39
entries (bytes) at address A6: 96-134 (60-86h) where the
OEM can enter the temperature difference between the
chip (sensed) temperature and the measured module
case temperature over the operating temperature range.
Table 7 shows the correspondence between the entries
and temperature intervals.
Channel
TEMP
VMPD
VAUX
VILD
VRX
ADC Resolution
Note:
1. Assumes typical V
Channel
V
V
V
V
APCDAC
MODDAC
FLTDAC
IN
DDA
BIAS
MOD
8 or 9
(bits)
12
8
8
8
Table 6. V
Table 5. A/D Input Signal Ranges and Resolutions
VAUX [2:0]
000 = 00
0001 = 01
010 = 02
011 = 03
100 = 04
101 = 05
110 = 06
REF
AUX
value of 1.22V.
GAIN = 0; BIASREF = 0
GAIN = 0; BIASREF = 1
GAIN = 1; BIASREF = 0
GAIN = 1; BIASREF = 1
Input Signal Ranges and Resolutions
h
h
h
h
h
h
VILD- = GNDA
VILD- = VDDA
h
RXPOT = 00
Conditions
Input Range (V)
0.5V to 5.5V
0.5V to 5.5V
0.5V to 5.5V
0.5V to 5.5V
0V to V
0V to V
0V to V
19
REF
REF
REF
The resolution of this table is 0.5ºC/bit. The number
entered should be twice the temperature difference. For
example if the chip-case temperature difference is 5ºC,
the value to be entered should be 2x5=10.
V
V
V
See Table 6
DDA
DDA
DDA
Input Range (V)
GNDA - V
LSB
25.6mV
25.6mV
25.6mV
25.6mV
4.77mV
4.77mV
4.77mV
GNDA - V
GNDA - V
– (V
– (V
– (V
0 - V
(1)
N/A
DDA
DDA
DDA
(mV)
REF
– V
REF
[e-mail]
– V
– V
REF
REF
/4
REF
REF
REF
/4
)
)
)
1°C or 0.5°C
0.298mV
4.77mV
1.17mV
4.77mV
LSB
or [phone]
M9999-073107-B
(1)
MIC3002