參數(shù)資料
型號(hào): ADSP-21160MKB-80
廠商: ANALOG DEVICES INC
元件分類(lèi): 數(shù)字信號(hào)處理
英文描述: DSP Microcomputer
中文描述: 64-BIT, 80 MHz, OTHER DSP, PBGA400
封裝: 27 X 27 MM, METRIC, PLASTIC, BGA-400
文件頁(yè)數(shù): 42/53頁(yè)
文件大?。?/td> 696K
代理商: ADSP-21160MKB-80
ADSP-21160M
42
REV. 0
Output Drive Currents
Figure 29
shows typical I
V characteristics for the output drivers of the ADSP-21160M. The curves represent the current
drive capability of the output drivers as a function of output voltage.
Power Dissipation
Total power dissipation has two components, one due to internal circuitry and one due to the switching of external output
drivers.
Internal power dissipation is dependent on the instruction execution sequence and the data operands involved. Using the
current specifications (I
DDINPEAK
, I
DDINHIGH
, I
DDINLOW
, I
DDIDLE
) from
Electrical Characteristics on page 13
and the current-ver-
sus-operation information in
Table 29
, engineers can estimate the ADSP-21160M
s internal power supply (V
DDINT
) input
current for a specific application, according to the following formula:
The external component of total power dissipation is caused by the switching of output pins. Its magnitude depends on:
the number of output pins that switch during each cycle (O)
the maximum frequency at which they can switch (f)
their load capacitance (C)
their voltage swing (VDD)
and is calculated by:
P
EXT
=
O
×
C
×
V
DD
2
×
f
Figure 29. ADSP-21160M Typical Drive Currents
#
$
$
B*
B*
B*
B*
#
#
$
$
$)
$
$
$
)
=B'@G
=B@*G
=B@)*G
=B'@G
=B@*G
=B@)*G
% Peak
I
DDINPEAK
I
DDINHIGH
I
DDINLOW
I
I
DDINT
×
×
×
% High
% Low
+ % Idle
×
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