OUTPUT DRIVE CURRENTS
Figure 30 through Figure 41 show typical current-voltage char
acteristics for the output drivers of the ADSP-BF531/
ADSP-BF532/ADSP-BF533 processor. The curves represent the
current drive capability of the output drivers as a function of
output voltage.
150
VDDEXT = 2.75V
100
VDDEXT = 2.50V
VDDEXT = 2.25V
50
0
–50
–100
VOH
VOL
–150
0
80
60
40
20
0
–20
–40
–60
–80
0
0.5
1.0
1.5
2.0
SOURCE VOLTAGE (V)
2.5
3.0
Figure 30. Drive Current A (VDDEXT = 2.5 V)
VDDEXT = 1.9V
VDDEXT = 1.8V
VDDEXT = 1.7V
0.5
1.0
1.5
2.0
SOURCE VOLTAGE (V)
Figure 31. Drive Current A (VDDEXT = 1.8 V)
ADSP-BF531/ADSP-BF532/ADSP-BF533
150
100
50
0
–50
–100
–150
0
150
100
50
0
–50
–100
–150
0
80
60
40
20
0
–20
–40
–60
–80
0
VDDEXT = 3.65V
VDDEXT = 3.30V
VDDEXT = 2.95V
VOH
VOL
0.5
1.0
1.5
2.0
2.5
SOURCE VOLTAGE (V)
Figure 32. Drive Current A (VDDEXT = 3.3 V)
3.0
3.5
VDDEXT = 2.75V
VDDEXT = 2.50V
VDDEXT = 2.25V
VOH
VOL
0.5
1.0
1.5
2.0
SOURCE VOLTAGE (V)
2.5
3.0
Figure 33. Drive Current B (VDDEXT = 2.5 V)
VDDEXT = 1.9V
VDDEXT = 1.8V
VDDEXT = 1.7V
0.5
1.0
1.5
2.0
SOURCE VOLTAGE (V)
Figure 34. Drive Current B (VDDEXT = 1.8 V)
Rev. E | Page 43 of 60 | July 2007