Datasheet

ADSP-BF531/ADSP-BF532/ADSP-BF533
Rev. I | Page 43 of 64 | August 2013
OUTPUT DRIVE CURRENTS
Figure 33 through Figure 44 show typical current-voltage char-
acteristics for the output drivers of the processors. The curves
represent the current drive capability of the output drivers as a
function of output voltage.
Figure 33. Drive Current A (V
DDEXT
= 2.5 V)
Figure 34. Drive Current A (V
DDEXT
= 1.8 V)
Figure 35. Drive Current A (V
DDEXT
= 3.3 V)
SOURCE CURRENT (mA)
SOURCE VOLTAGE (V)
150
100
50
0
–50
–100
–150
0
0.5 1.0 1.5 2.0 2.5 3.0
V
OH
V
OL
V
DDEXT
= 2.25V
V
DDEXT
= 2.50V
V
DDEXT
= 2.75V
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0
SOURCE CURRENT (mA)
80
60
40
20
0
–20
–40
–60
–80
V
DDEXT
= 1.9V
V
DDEXT
= 1.8V
V
DDEXT
= 1.7V
SOURCE CURRENT (mA)
SOURCE VOLTAGE (V)
150
100
50
0
–50
–100
–150
0
0.5 1.0 1.5 2.0 2.5 3.53.0
V
OH
V
DDEXT
= 2.95V
V
DDEXT
= 3.30V
V
DDEXT
= 3.65V
V
OL
Figure 36. Drive Current B (V
DDEXT
= 2.5 V)
Figure 37. Drive Current B (V
DDEXT
= 1.8 V)
Figure 38. Drive Current B (V
DDEXT
= 3.3 V)
SOURCE CURRENT (mA)
SOURCE VOLTAGE (V)
150
100
50
0
–50
–100
–150
0
0.5 1.0 1.5 2.0 2.5 3.0
V
OH
V
OL
V
DDEXT
= 2.25V
V
DDEXT
= 2.50V
V
DDEXT
= 2.75V
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0
SOURCE CURRENT (mA)
80
60
40
20
0
–20
–40
–60
–80
V
DDEXT
= 1.9V
V
DDEXT
= 1.8V
V
DDEXT
= 1.7V
V
OH
V
DDEXT
= 3.30V
V
DDEXT
= 2.95V
V
DDEXT
= 3.65V
V
OL
SOURCE VOLTAGE (V)
150
100
50
0
–50
–100
–150
0 0.5 1.0 1.5 2.0 2.5 3.53.0
SOURCE CURRENT (mA)