ADSP-BF538_15 Datasheet, PDF (47/60 Pages) Analog Devices – Blackfin Embedded Processor

OUTPUT DRIVE CURRENTS
Figure 33 through Figure 40 on Page 48 show typical current-
voltage characteristics for the output drivers of the ADSP-
BF538/ADSP-BF538F processors. The curves represent the cur-
rent drive capability of the output drivers as a function of output
voltage.
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
0
V_DDEXT = 2.75V
V_OH
V_OL
0.5
1.0
1.5
2.0
2.5
3.0
SOURCE VOLTAGE (V)
Figure 33. Drive Current A (Low V_DDEXT)
150
V_DDEXT = 3.0V
100
V_DDEXT = 3.3V
V_DDEXT = 3.6V
50
V_OH
0
-50
-100
-150
0
V_OL
0.5
1.0
1.5
2.0
2.5
3.0
SOURCE VOLTAGE (V)
Figure 34. Drive Current A (High V_DDEXT)
3.5
4.0
ADSP-BF538/ADSP-BF538F
150
100
50
0
-50
-100
-150
0
V_DDEXT = 2.75V
V_OH
V_OL
0.5
1.0
1.5
2.0
2.5
3.0
SOURCE VOLTAGE (V)
Figure 35. Drive Current B (Low V_DDEXT)
200
150
100
50
0
-50
-100
-150
-200
0
V_DDEXT = 3.0V
V_DDEXT = 3.3V
V_DDEXT = 3.6V
V_OH
V_OL
0.5
1.0
1.5
2.0
2.5
3.0
SOURCE VOLTAGE (V)
Figure 36. Drive Current B (High V_DDEXT)
3.5
4.0
Rev. E | Page 47 of 60 | November 2013