Datasheet

ADSP-BF538/ADSP-BF538F
Rev. E | Page 47 of 60 | November 2013
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.
Figure 33. Drive Current A (Low V
DDEXT
)
Figure 34. Drive Current A (High V
DDEXT
)
0
S
O
U
R
C
E
C
U
R
R
EN
T
(
m
A
)
SOURCE VOLTAGE (V)
0
0.5 1.0 1.5 2.0 2.5
3.0
100
60
40
- 80
- 60
- 40
-
20
120
20
80
- 100
V
DDEXT
= 2.75V
V
OH
V
OL
0
S
OU
R
C
E
C
U
R
R
E
N
T
(
m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
150
100
50
- 150
- 100
- 50
V
OL
V
OH
4.0
V
DDEXT
=3.0V
V
DDEXT
=3.3V
V
DDEXT
=3.6V
Figure 35. Drive Current B (Low V
DDEXT
)
Figure 36. Drive Current B (High V
DDEXT
)
0
S
O
U
RC
E
C
U
R
RE
N
T
(m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0
150
100
- 150
V
OL
V
OH
- 100
-
50
50
V
DDEXT
=2.75V
0
S
O
U
RC
E
C
U
R
R
E
N
T
(m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
150
100
50
- 200
- 150
V
OL
V
OH
4.0
- 100
- 50
200
V
DDEXT
=3.0V
V
DDEXT
=3.3V
V
DDEXT
=3.6V