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參數(shù)資料
| 型號： | DSP56721 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
| 中文描述： | SymphonyTM DSP56720 / DSP56721多核音頻處理器 |
| 文件頁數(shù)： | 10/54頁 |
| 文件大?。?/td> | 671K |
| 代理商： | DSP56721 |
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Symphony
TM
DSP56720 / DSP56721 Multi-Core Audio Processors, Rev.1
Freescale Semiconductor
10
2.1.2
Thermal Characteristics
For thermal characteristics, see
Table 5
.
2.1.3
Power Requirements
To prevent high current conditions due to possible improper sequencing of the power supplies, use an external Schottky diode
as shown in
Figure 6
, connected between the DSP56720/DSP56721 IO_VDD and Core_VDD power pins.
Figure 6. Prevent High Current Conditions by Using External Schottky Diode
If an external Schottky diode is not used (to prevent a high current condition at power-up), then IO_VDD must be applied ahead
of Core_VDD, as shown in
Figure 7
.
Figure 7. Prevent High Current Conditions by Applying IO_VDD Before Core_VDD
For correct operation of the internal power-on reset logic, the Core_VDD ramp rate (Tr) to full supply must be less than 10 ms,
as shown in
Figure 8
.
Table 5. Thermal Characteristics
Characteristic
Board Type
Symbol
LQFP Values
Unit
°
C/W
Natural Convection, Junction-to-ambient thermal resistance
1,2
Single layer board
(1s)
R
θ
JA
or
θ
JA
57 for 80 QFP
49 for 144 QFP
Four layer board
(2s2p)
44 for 80 QFP
40 for 144 QFP
°
C/W
Junction-to-case thermal resistance
3
–
R
θ
JC
or
θ
JC
10 for 80 QFP
9 for 144 QFP
°
C/W
Notes:
1.
Junction temperature is a function of die size, on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal resistance.
Per SEMI G38-87 and JEDEC JESD51-2 with the single layer board horizontal.
Thermal resistance between the die and the case top surface as measured by the cold plate method
(MIL SPEC-883 Method 1012.1).
2.
3.
IO_VDD
Core_VDD
External
Schottky
Diode
Core_VDD
IO_VDD
相關PDF資料 |
PDF描述 |
|---|---|
| DSPA56720AG | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
| DSPA56721AF | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
| DSPA56721AG | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
| DSPB56720AG | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
| DSPB56721AF | SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors |
相關代理商/技術參數(shù) |
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|---|---|
| DSP56724 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Symphony? DSP56724/DSP56725 Multi-Core Audio Processors |
| DSP56725 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Symphony? DSP56724/DSP56725 Multi-Core Audio Processors |
| DSP56800 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Preliminary Technical Data DSP56F826 16-bit Digital Signal Processor |
| DSP56800E | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Digitial Signal Controller |
| DSP56800EERM | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers |
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