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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)： | 34/39頁 |
| 文件大?。?/td> | 257K |
| 代理商： | ADSP-2141LKS-E1 |
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REV. 0
ADSP-2141L
–34–
Table IV. Thermal Ratings: MQFP Package
Rating Description
Symbol
θ
CA
θ
JA
θ
JC
Value (MQFP Still Air)
30.7
°
C/W
35
°
C/W
4.3
°
C/W
Value (MQFP 9500 fpm)
16.7
°
C/W
21
°
C/W
4.3
°
C/W
Thermal Resistance (Case to Ambient)
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
ENVIRONMENTAL CONDITIONS
The following figures assume a four-layer JEDEC printed circuit
board:
T
AMB
=
T
CASE
– (
PD
×
θ
CA
)
T
CASE
=
Case Temperature in
°
C
OUTPUT DRIVE CURRENTS
Figures 28 and 29 show typical I-V characteristics for the
output drivers of the ADSP-2141L. The curves represent the
current drive capability of the output drivers as a function of
output voltage.
SOURCE VOLTAGE – V
100
–40
–100
0
3.5
S
0.5
1.0
1.5
2.0
2.5
3.0
80
–20
–60
–80
40
0
60
20
V
DD
= 3.0V @ +70
8
C
4.0
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.6V @ 0
8
C
V
DD
= 3.0V @ +70
8
C
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.6V @ 0
8
C
Figure 28. Typical Drive Currents (PCI Pins)
SOURCE VOLTAGE – V
–40
0
3.5
S
0.5
1.0
1.5
2.0
2.5
3.0
80
–20
–60
–80
40
0
60
20
V
DD
= 3.0V @ +70
8
C
4.0
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.6V @ 0
8
C
V
DD
= 3.0V @ +70
8
C
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.6V @ 0
8
C
V
OH
V
OL
Figure 29. Typical Drive Currents (Addr/Dbus/rd/wr Pins)
POWER DISSIPATION
Total power dissipation has two components: one due to inter-
nal circuitry and one due to the switching of external output
drivers. Internal power dissipation depends on the sequence in
which instructions execute and the data operands involved. See
I
DDIN
calculation in Electrical Characteristics section. Internal
power dissipation is calculated this way:
P
INT
= I
DDIN
×
V
DD
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 the pins can switch (f)
– the load capacitance of the pins (C)
– the voltage swing of the pins (V
DD
).
The external component is calculated using:
P
EXT
= O
×
C
×
V
DD2
×
f
The load capacitance should include the processor’s package
capacitance (C
IN
). The frequency f includes driving the load
high and then back low.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADSP-2141LKS-N1 | DSP |
| ADSP-2187L | DSP（Digital Signal Processing）Microcomputer(數(shù)字信號處理控制器) |
| ADSP-2189M | DSP Microcomputer(數(shù)字信號處理微型單片機芯片) |
| ADSP-2191MBST-140 | DSP Microcomputer |
| ADSP-2191 | DSP Microcomputer |
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: |
| ADSP2142MKS300X | 制造商:AD 功能描述:* |
| 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 |
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