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參數(shù)資料
| 型號： | ADSP-2186LKST-115 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | 24-BIT, 20 MHz, OTHER DSP, PQFP100 |
| 封裝： | MS-026BED, LQFP-100 |
| 文件頁數(shù)： | 27/36頁 |
| 文件大小： | 237K |
| 代理商： | ADSP-2186LKST-115 |
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ADSP-2186
–27–
REV. A
OUTPUT DRIVE CURRENTS
Figure 22 shows typical I-V characteristics for the output drivers
of the ADSP-2186. The curves represent the current drive
capability of the output drivers as a function of output voltage.
SOURCE VOLTAGE – Volts
60
40
–60
0
6
1
S
2
3
4
5
20
0
–20
–40
–80
5.5V, –40
8
C
V
OH
5.0V, +25
8
C
4.5V, +85
8
C
4.5V, +85
8
C
5.0V, +25
8
C
5.5V, –40
8
C
V
OL
Figure 22. Typical Drive Currents
POWER DISSIPATION
To determine total power dissipation in a specific application,
the following equation should be applied for each output:
C
×
V
DD2
×
f
C
= load capacitance,
f
= output switching frequency.
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
= 5.0 V and t
CK
= 30 ns.
Total Power Dissipation = P
INT
+ (
C
×
V
DD
2
×
f
)
P
INT
= internal power dissipation from Power vs. Frequency
graph (Figure 23).
(
C
×
V
DD
2
×
f
) is calculated for each output:
# of
Pins
3
C
3
V
DD2
×
5
2
V
×
5
2
V
×
5
2
V
×
5
2
V
3
f
Address,
DMS
Data Output,
WR
9
RD
CLKOUT
8
×
10 pF
×
10 pF
×
10 pF
×
10 pF
×
40 MHz = 80 mW
×
20 MHz = 45 mW
×
20 MHz =
×
40 MHz = 10 mW
1
1
5 mW
140 mW
Total power dissipation for this example is PINT + 140 mW.
80
20
0
60
40
P
I
n
1/tcyc – MHz
33.33
40
IDLE (16)
IDLE (128)
IDLE
POWER, IDLE nMODES
2
0
80
40
20
60
P
I
)
1/tcyc – MHz
33.33
40
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
POWER, IDLE
1,2,4
100
1/tcyc – MHz
40
33.33
100
300
200
500
400
P
I
)
0
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
2186 POWER, INTERNAL
1,2,3
385mW
300mW
225mW
330mW
250mW
180mW
91.5mW
70.5mW
52mW
82mW
62mW
45mW
70.5mW
36.6mW
34.3mW
62mW
34.7mW
32.8mW
TYPICAL POWER DISSIPATION AT 5.0V V
AND T
= +25
8
C EXCEPT WHERE SPECIFIED.
I
DD
MEASUREMENT TAKEN WITH ALL INSTRUCTIONS EXECUTING FROM INTERNAL
MEMORY. 50% OF THE INSTRUCTIONS ARE MULTIFUNCTION (TYPES 1, 4, 5, 12, 13, 14),
30% ARE TYPE 2 AND TYPE 6, AND 20% ARE IDLE INSTRUCTIONS.
IDLE REFERS TO ADSP-2186 STATE OF OPERATION DURING EXECUTION OF IDLE
INSTRUCTION. DEASSERTED PINS ARE DRIVEN TO EITHER V
DD
OR GND.
1
2
3
4
POWER REFLECTS DEVICE OPERATING WITH NO OUTPUT LOADS.
Figure 23. Power vs. Frequency
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| ADSP-2187LKST-210 | DSP Microcomputer |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-2186LKST-115R | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 28.8MHz 28.8MIPS 100-Pin LQFP T/R |
| ADSP-2186LKST-115R3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:DSP Microcomputer |
| ADSP-2186LKST-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 32.2MHz 32.2MIPS 100-Pin LQFP |
| ADSP-2186LKST-160 | 制造商:AD 制造商全稱:Analog Devices 功能描述:DSP Microcomputer |
| ADSP-2186LKSTZ-133 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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