SFP Laser Controller and
Diagnostic IC
Typical Operating Characteristics (continued)
(V CC = +3.3V, T A = 25°C, unless otherwise noted.)
1.0
DAC 0 DNL (LSB)
1.0
DAC 1 INL (LSB)
1.0
DAC 1 DNL (LSB)
0.8
1.5mA MODE
0.8
0.5mA MODE
0.8
0.5mA MODE
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
25 50 75 100 125 150 175 200 225 250
0
25 50 75 100 125 150 175 200 225 250
0
25 50 75 100 125 150 175 200 225 250
1.0
SETTING (DEC)
DAC 1 INL (LSB)
1.0
SETTING (DEC)
DAC 1 DNL (LSB)
0.50
SETTING (DEC)
DAC SETTING vs. POWER-UP VOLTAGE
0.8
0.6
0.4
0.2
1.5mA MODE
0.8
0.6
0.4
0.2
1.5mA MODE
0.40
0.30
DAC 0, 0.5mA
PROGRAMMED DAC
SETTING (80h)
0
0
-0.2
-0.4
-0.6
-0.8
-1.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.20
0.10
0
0
25 50 75 100 125 150 175 200 225 250
0
25 50 75 100 125 150 175 200 225 250
0
1
2 3 4
5
1.00
SETTING (DEC)
DAC 0 CURRENT vs. SUPPLY VOLTAGE
DAC 0, 0.5mA
2.0
SETTING (DEC)
DAC 0 CURRENT vs. SUPPLY VOLTAGE
DAC 0, 1.5mA
1.00
POWER-UP VOLTAGE (V)
DAC 1 CURRENT vs. SUPPLY VOLTAGE
DAC 1, 0.5mA
0.80
0.60
PROGRAMMED DAC
SETTING (FFh)
1.6
1.2
PROGRAMMED DAC
0.80
0.60
PROGRAMMED DAC
SETTING (FFh)
SETTING (FFh)
0.40
0.20
0.00
0.8
0.4
0
0.40
0.20
0.00
3.0
3.5
4.0 4.5 5.0
5.5
3.0
3.5
4.0 4.5 5.0
5.5
3.0
3.5
4.0 4.5 5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
____________________________________________________________________
11
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