Specifications

6 DSP56800 Hardware Interface Techniques 
System Functions
Figure 6. IDDA vs. VDDA
2.3.4 Variation with Respect to Operating Frequency
The digital supply current requirement of CMOS devices with respect to frequency is approximately
linear, as shown in Figure 7 below. These curves are consistent with the device current model.
Figure 7. IDD vs. PLL Frequency
IDDA vs. VDDA (nom Temp, 80 MHz PLL)
52
52.5
53
53.5
54
54.5
55
55.5
VDDA min VDDA nom VDDA max
VDDA
IDD vs. PLL Frequency
0
20
40
60
80
100
120
0 MHz 20 Mhz 40 Mhz 60 Mhz 80 Mhz
PLL Frequency
Analog IDD typical
Analog IDD max
IO IDD max
IO IDD typical
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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Go to: www.freescale.com
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