MIC3002_10 Datasheet, PDF (19/65 Pages) Micrel Semiconductor – FOM Management IC with Internal Calibration

Micrel, Inc.
MIC3002
Channel
TEMP
VAUX
VMPD
VILD
VRX
ADC Resolution
(bits)
8 or 9
8
8
8
12
Conditions
GAIN = 0; BIASREF = 0
GAIN = 0; BIASREF = 1
GAIN = 1; BIASREF = 0
GAIN = 1; BIASREF = 1
VILD- = VDDA
VILD- = GNDA
RXPOT = 00
Input Range (V)
N/A
See Table 6
GNDA - VREF
VDDA – (VDDA – VREF)
GNDA - VREF/4
VDDA – (VDDA – VREF/4)
VDDA – (VDDA – VREF)
GNDA - VREF
0 - VREF
Note:
Table 5. A/D Input Signal Ranges and Resolutions
1. Assumes typical VREF value of 1.22V.
LSB⁽¹⁾
1°C or 0.5°C
4.77mV
1.17mV
4.77mV
0.298mV
Channel
VIN
VDDA
VBIAS
VMOD
APCDAC
MODDAC
FLTDAC
VAUX [2:0]
000 = 00h
0001 = 01h
010 = 02h
011 = 03h
100 = 04h
101 = 05h
110 = 06h
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 VREF
0V to VREF
0V to VREF
LSB⁽¹⁾ (mV)
25.6mV
25.6mV
25.6mV
25.6mV
4.77mV
4.77mV
4.77mV
Table 6. VAUX Input Signal Ranges and Resolutions
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.
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.
July 2007
19
M9999-073107-B
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