參數(shù)資料
型號(hào)： DSP5685xUM
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 16-bit Digital Signal Controllers
中文描述： 16位數(shù)字信號(hào)控制器
文件頁(yè)數(shù)： 57/60頁(yè)
文件大?。?/td> 836K
代理商： DSP5685XUM
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
DSP56854E 16-bit Digital Signal Controllers
DSP56854FG120 16-bit Digital Signal Controllers
DSP56855BU120 16-bit Digital Signal Controllers
DSP56855BUE 16-bit Digital Signal Controllers
DSP56855E 16-bit Digital Signal Controllers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSP5685XUMAD 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:DSP5685XUMAD Rev 2.0 Addendum
DSP56ADC16D 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog-to-Digital Converter， 16-Bit
DSP56ADC16L 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog-to-Digital Converter， 16-Bit
DSP56ADC16P 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog-to-Digital Converter， 16-Bit
DSP56ADC16S 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*