参数资料
型号: DSPB56721AF
厂商: Freescale Semiconductor
文件页数: 54/54页
文件大小: 0K
描述: AUDIO PROCESSOR SYMPH 80-LQFP
标准包装: 90
系列: DSP56K/Symphony
类型: 音频处理器
接口: 主机接口,I²C,SAI,SPI
时钟速率: 200MHz
非易失内存: 外部
芯片上RAM: 744kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.00V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 80-LQFP
供应商设备封装: 80-LQFP(14x14)
包装: 托盘
Symphony DSP56720/DSP56721 Multi-Core Audio Processors, Rev. 5
Freescale Semiconductor
9
2.2
Thermal Characteristics
Table 3 provides the thermal characteristics for the device.
The average chip-junction temperature (TJ) in °C can be obtained from:
TJ = TA + (PD × θJMA)
Where:
TA = Ambient Temperature, °C
θ
JMA= Package Thermal Resistance, Junction-to-Ambient, °C/W
PD = PINT + PI/O
PINT = IDD × VDD, Watts – Chip Internal Power
PI/O = Power Dissipation on Input and Output Pins—User Determined
For most applications, PI/O < PINT and can be ignored. PD can be calculated using the worst-case conditions of 1.1 V and
780 mA. See Table 4 for more information.
To find TJ at 100° C, using the worst-case conditions and a four-layer board:
Storage temperature
TSTG
–65 to +150
°C
ESD protected voltage (Human Body Model)
2000
V
ESD protected voltage (Charged Device)
All pins
Corner pins
500
750
V
Note:
1. GND = 0 V, TJ = –40° C to 100° C, CL = 50 pF
2. Absolute maximum ratings are stress ratings only, and functional operation at the maximum is not guaranteed. Stress
beyond the maximum rating may affect device reliability or cause permanent damage to the device.
3. If the power supply ramp to full supply time is longer than 10 ms, the POR circuitry will not operate correctly, causing
erroneous operation.
Table 3. Thermal Characteristics
Characteristic
Board Type
Symbol
LQFP Values
Unit
Natural Convection, Junction-to-ambient thermal resistance1,2
Single layer board
(1s)
RθJA or θJA
57 for 80 QFP
49 for 144 QFP
°C/W
Four layer board
(2s2p)
44 for 80 QFP
40 for 144 QFP
°C/W
Junction-to-case thermal resistance3
—RθJC or θJC 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.
2, Per SEMI G38-87 and JEDEC JESD51-2 with the single layer board horizontal.
3. Thermal resistance between the die and the case top surface as measured by the cold plate method
(MIL SPEC-883 Method 1012.1).
Table 2. Maximum Ratings (Continued)
Rating1
Symbol
Value1, 2
Unit
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