- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377001 > DSP56854E (飛思卡爾半導(dǎo)體(中國)有限公司) 16-bit Digital Signal Controllers PDF資料下載
參數(shù)資料
| 型號： | DSP56854E |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | 16-bit Digital Signal Controllers |
| 中文描述： | 16位數(shù)字信號控制器 |
| 文件頁數(shù)： | 57/60頁 |
| 文件大?。?/td> | 836K |
| 代理商： | DSP56854E |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁當(dāng)前第57頁第58頁第59頁第60頁
Electrical Design Considerations
56854 Technical Data, Rev. 6
Freescale Semiconductor
57
As noted above, the junction-to-case thermal resistances quoted in this data sheet are determined using the
first definition. From a practical standpoint, that value is also suitable for determining the junction
temperature from a case thermocouple reading in forced convection environments. In natural convection,
using the junction-to-case thermal resistance to estimate junction temperature from a thermocouple
reading on the case of the package will estimate a junction temperature slightly hotter than actual. Hence,
the new thermal metric, Thermal Characterization Parameter, or
Ψ
JT
, has been defined to be (T
J
– T
T
)/P
D
.
This value gives a better estimate of the junction temperature in natural convection when using the surface
temperature of the package. Remember that surface temperature readings of packages are subject to
significant errors caused by inadequate attachment of the sensor to the surface and to errors caused by heat
loss to the sensor. The recommended technique is to attach a 40-gauge thermocouple wire and bead to the
top center of the package with thermally conductive epoxy.
6.2 Electrical Design Considerations
Use the following list of considerations to assure correct operation:
Provide a low-impedance path from the board power supply to each V
DD
pin on the controller, and from the
board ground to each V
SS
(GND) pin.
The minimum bypass requirement is to place six 0.01–0.1
μ
F capacitors positioned as close as possible to
the package supply pins. The recommended bypass configuration is to place one bypass capacitor on each
of the ten V
DD
/V
SS
pairs, including V
DDA
/V
SSA.
Ensure that capacitor leads and associated printed circuit traces that connect to the chip V
DD
and V
SS
(GND)
pins are less than 0.5 inch per capacitor lead.
Use at least a four-layer Printed Circuit Board (PCB) with two inner layers for V
DD
and GND.
Bypass the V
DD
and GND layers of the PCB with approximately 100
μ
F, preferably with a high-grade
capacitor such as a tantalum capacitor.
Because the device’s output signals have fast rise and fall times, PCB trace lengths should be minimal.
CAUTION
This device contains protective circuitry to guard against
damage due to high static voltage or electrical fields.
However, normal precautions are advised to avoid
application of any voltages higher than maximum rated
voltages to this high-impedance circuit. Reliability of
operation is enhanced if unused inputs are tied to an
appropriate voltage level.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DSP56854FG120 | 16-bit Digital Signal Controllers |
| DSP56855BU120 | 16-bit Digital Signal Controllers |
| DSP56855BUE | 16-bit Digital Signal Controllers |
| DSP56855E | 16-bit Digital Signal Controllers |
| DSP56857BUE | 16-bit Digital Signal Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSP56854FG120 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 120Mhz/120MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| DSP56854FGE | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 120Mhz/120MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| DSP56854PB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:56854 Digital Signal Processor Product Brief |
| DSP56855 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Digitial Signal Controller |
| DSP56855BU120 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 120Mhz/120MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。