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參數(shù)資料
| 型號： | ADSP-2184 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | LM2941/LM2941C 1A Low Dropout Adjustable Regulator; Package: TO-263; No of Pins: 5; Qty per Container: 45; Container: Rail |
| 中文描述： | DSP的微機(jī) |
| 文件頁數(shù)： | 26/31頁 |
| 文件大小： | 216K |
| 代理商： | ADSP-2184 |
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ADSP-2184L
–26–
REV. 0
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
= 3.3 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 21).
(
C
×
V
DD
2
×
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
×
3.3
2
V
×
33.3 MHz
×
10 pF
×
3.3
2
V
×
16.67 MHz =
×
10 pF
×
3.3
2
V
×
16.67 MHz =
×
10 pF
×
3.3
2
V
×
33.3 MHz
=
29.0 mW
16.3 mW
1.8 mW
3.6 mW
50.7 mW
=
Total power dissipation for this example is PINT + 50.7 mW.
Output Drive Currents
Figure 20 shows typical I-V characteristics for the output drivers
of the ADSP-2184L. The curves represent the current drive
capability of the output drivers as a function of output voltage.
SOURCE VOLTAGE – V
0
3.5
0.5
1
1.5
2
2.5
3
80
–80
S
60
0
–20
–40
–60
40
20
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.6V @ –40
8
C
V
DD
= 3.0V @ +85
8
C
V
DD
= 3.3V @ +25
8
C
V
DD
= 3.0V @ +85
8
C
V
DD
= 3.6V @ –40
8
C
V
OH
V
OL
Figure 20. Typical Output Driver Characteristics
VALID FOR ALL TEMPERATURE GRADES.
1
POWER REFLECTS DEVICE OPERATING WITH NO OUTPUT LOADS.
2
TYPICAL POWER DISSIPATION AT 3.3V V
DD
AND T
A
= 25
8
C EXCEPT WHERE SPECIFIED.
3
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.
4
IDLE REFERS TO ADSP-2184L STATE OF OPERATION DURING EXECUTION OF IDLE
INSTRUCTION. DEASSERTED PINS ARE DRIVEN TO EITHER V
DD
OR GND.
28
26
24
22
20
8
6
16
14
12
10
18
P
I
n
1/t
CK
– MHz
30
32
34
36
38
40
42
22mW
10mW
13mW
12mW
IDLE (16)
IDLE (128)
IDLE
POWER, IDLE nMODES
2
30
32
22
20
18
16
30
28
24
26
P
I
)
1/t
CK
– MHz
42
30
32
34
36
38
40
27mW
35mW
V
DD
= 3.6V
22mW
22mW
V
DD
= 3.3V
17mW
28mW
V
DD
= 3.0V
POWER, IDLE
1, 2, 4
1/t
CK
– MHz
42
30
32
34
36
38
40
180
80
170
120
110
100
90
160
150
130
140126mW
102mW
83mW
139mW
113mW
V
DD
= 3.6V
V
DD
= 3.3V
V
DD
= 3.0V
2184L POWER, INTERNAL
1, 2, 3
169mW
P
I
)
34
36
28mW
9mW
Figure 21. Power vs. Frequency
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| ADSP-2184BST-160 | DSP Microcomputer |
| ADSP-2184L | LM2941/LM2941C 1A Low Dropout Adjustable Regulator; Package: TO-220; No of Pins: 5; Qty per Container: 45; Container: Rail |
| ADSP-2184NKST-320 | DSP Microcomputer |
| ADSP-2186NKCA-320 | DSP Microcomputer |
| ADSP-2184N | DSP Microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-2184BST-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 40MHz 40MIPS 100-Pin LQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT |
| ADSP-2184BSTZ-160 | 功能描述:IC DSP CONTROLLER 16BIT 100LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標(biāo)準(zhǔn)包裝:40 系列:TMS320DM64x, DaVinci™ 類型:定點 接口:I²C，McASP，McBSP 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:160kB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:0°C ~ 90°C 安裝類型:表面貼裝 封裝/外殼:548-BBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:548-FCBGA（27x27） 包裝:托盤 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA |
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| ADSP-2184L | 制造商:AD 制造商全稱:Analog Devices 功能描述:DSP Microcomputer |
| ADSP-2184LBST-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 40MHz 40MIPS 100-Pin LQFP 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT |
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