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.
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150 |
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VDDEXT = 2.75V |
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100 |
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VDDEXT = 2.50V |
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VDDEXT |
= 2.25V |
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(mA) |
50 |
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CURRENT |
0 |
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VOH |
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SOURCE |
–50 |
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VOL |
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–100 |
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–150 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
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0 |
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SOURCE VOLTAGE (V)
Figure 30. Drive Current A (VDDEXT = 2.5 V)
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80 |
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60 |
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VDDEXT = 1.9V |
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VDDEXT = 1.8V |
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(mA) |
40 |
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VDDEXT = 1.7V |
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CURRENT |
20 |
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OURCES |
0 |
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–20 |
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–40 |
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–60 |
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–80 |
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0 |
0.5 |
1.0 |
1.5 |
2.0 |
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SOURCE VOLTAGE (V)
Figure 31. Drive Current A (VDDEXT = 1.8 V)
ADSP-BF531/ADSP-BF532/ADSP-BF533 |
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|
150 |
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VDDEXT = 3.65V |
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100 |
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VDDEXT = 3.30V |
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VDDEXT = 2.95V |
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(mA) |
50 |
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CURRENT |
0 |
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VOH |
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SOURCE |
–50 |
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–100 |
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VOL |
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–150 |
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0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
SOURCE VOLTAGE (V)
Figure 32. Drive Current A (VDDEXT = 3.3 V)
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150 |
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100 |
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VDDEXT = 2.75V |
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VDDEXT = 2.50V |
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(mA) |
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VDDEXT = 2.25V |
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50 |
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CURRENT |
0 |
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VOH |
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SOURCE |
–50 |
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–100 |
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VOL |
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–150 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
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0 |
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SOURCE VOLTAGE (V)
Figure 33. Drive Current B (VDDEXT = 2.5 V)
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80 |
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60 |
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VDDEXT = 1.9V |
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VDDEXT = 1.8V |
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(mA) |
40 |
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VDDEXT = 1.7V |
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CURRENT |
20 |
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OURCES |
0 |
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–20 |
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–40 |
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–60 |
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–800 |
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0.5 |
1.0 |
1.5 |
2.0 |
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SOURCE VOLTAGE (V) |
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Figure 34. Drive Current B (VDDEXT = 1.8 V)
Rev. E | Page 43 of 60 | July 2007
ADSP-BF531/ADSP-BF532/ADSP-BF533 |
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|
150 |
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VDDEXT = 3.65V |
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100 |
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VDDEXT = 3.30V |
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VDDEXT = 2.95V |
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(mA) |
50 |
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CURRENT |
0 |
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VOH |
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SOURCE |
–50 |
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–100 |
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VOL |
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–150 |
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0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
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SOURCE VOLTAGE (V) |
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Figure 35. Drive Current B (VDDEXT = 3.3 V)
|
60 |
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VDDEXT = 2.75V |
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40 |
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VDDEXT = 2.50V |
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VDDEXT = 2.25V |
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20 |
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(mA) |
0 |
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CURRENT |
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VOH |
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–20 |
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SOURCE |
–40 |
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VOL |
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–60 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
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0 |
SOURCE VOLTAGE (V)
Figure 36. Drive Current C (VDDEXT = 2.5 V)
|
30 |
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VDDEXT = 1.9V |
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20 |
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VDDEXT = 1.8V |
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VDDEXT = 1.7V |
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(mA) |
10 |
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CURRENT |
0 |
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OURCES |
–10 |
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–20 |
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–30 |
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–40 |
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0 |
0.5 |
1.0 |
1.5 |
2.0 |
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SOURCE VOLTAGE (V)
Figure 37. Drive Current C (VDDEXT = 1.8 V)
|
100 |
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80 |
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VDDEXT = 3.65V |
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VDDEXT = 3.30V |
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60 |
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VDDEXT = 2.95V |
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(mA) |
40 |
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20 |
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CURRENT |
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0 |
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VOH |
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–20 |
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SOURCE |
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–40 |
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–60 |
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VOL |
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–80 |
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–100 |
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0 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
SOURCE VOLTAGE (V)
Figure 38. Drive Current C (VDDEXT = 3.3 V)
|
100 |
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80 |
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VDDEXT = 2.75V |
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VDDEXT = 2.50V |
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|
60 |
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VDDEXT = 2.25V |
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(mA) |
40 |
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CURRENT |
20 |
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0 |
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VOH |
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SOURCE |
–20 |
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–40 |
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–60 |
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VOL |
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–80 |
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–100 |
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
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0 |
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SOURCE VOLTAGE (V)
Figure 39. Drive Current D (VDDEXT = 2.5 V)
|
60 |
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40 |
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VDDEXT = 1.9V |
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VDDEXT |
= 1.8V |
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(mA) |
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VDDEXT = 1.7V |
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20 |
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CURRENT |
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0 |
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OURCES |
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–20 |
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–40 |
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–60 |
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0.5 |
1.0 |
1.5 |
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2.0 |
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0 |
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SOURCE VOLTAGE (V)
Figure 40. Drive Current D (VDDEXT = 1.8 V)
Rev. E | Page 44 of 60 | July 2007