參數(shù)資料
型號: ADSP-2141LKS-E1
廠商: ANALOG DEVICES INC
元件分類: 加密電路
英文描述: DSP
中文描述: TELECOM, DATA ENCRYPTION CIRCUIT, PQFP208
封裝: METRIC, PLASTIC, QFP-208
文件頁數(shù): 35/39頁
文件大小: 257K
代理商: ADSP-2141LKS-E1
REV. 0
ADSP-2141L
–35–
Example:
In an application where external data memory is used and no
other outputs are active, power dissipation is calculated as
follows:
Assumptions:
External data memory is accessed every cycle with 50% of the
address pins switching.
External data memory writes occur every other cycle with
50% of the data pins switching.
Each address and data pin has a 10 pF total load at the pin.
The application operates at V
DD
= 3.3 V and t
CK
= 25 ns.
Total Power Dissipation
=
P
INT
+
(C
×
V
DD2
×
f
)
P
INT
= internal power dissipation from Power vs. Frequency
graphs (Figures 30 and 31).
(
C
×
V
DD2
×
f
) is calculated for each output:
# of
Pins
×
C
×
V
DD2
×
f
Address,
DMS
Data Output,
WR
RD
CLKOUT
8
9
1
1
×
10 pF
×
10 pF
×
10 pF
×
10 pF
×
3.3
2
V
×
40 MHz
×
3.3
2
V
×
20 MHz
×
3.3
2
V
×
40 MHz
×
3.3
2
V
×
20 MHz
=
=
=
=
34.8 mW
19.6 mW
2.2 mW
4.4 mW
61.0 mW
Total power dissipation for this example is P
INT
+61 mW.
FREQUENCY – MHz
940
40
P
I
)
33
34
35
36
37
38
840
340
640
440
740
540
42
32
41
39
V
DD
= 3.6V
V
DD
= 3.3V
V
DD
= 3.0V
706mW
554mW
431mW
823mW
649mW
509mW
POWER, INTERNAL
Figure 30. Power vs. Frequency
FREQUENCY – MHz
80
40
P
I
)
33
34
35
36
37
38
75
40
65
50
70
60
42
32
41
39
V
DD
= 3.6V
V
DD
= 3.3V
V
DD
= 3.0V
68mW
51mW
41mW
74mW
53mW
43mW
55
45
POWER, IDLE
Figure 31. Power vs. Frequency
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADSP-2141LKS-N1 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:Digital Signal Processor, 16 Bit, 208 Pin, Plastic, QFP
ADSP-2141LKSZ-N1 制造商:Analog Devices 功能描述:
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ADSP-21462W 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor material that is subject to change without notice
ADSP-21465W 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor material that is subject to change without notice