参数资料
型号: ADSP-21261SKSTZ150
厂商: Analog Devices Inc
文件页数: 32/44页
文件大小: 0K
描述: IC DSP 32BIT 150MHZ 144LQFP
产品培训模块: SHARC Processor Overview
标准包装: 60
系列: SHARC®
类型: 浮点
接口: DAI,SPI
时钟速率: 150MHz
非易失内存: ROM(384 kB)
芯片上RAM: 128kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.20V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
Rev. 0
|
Page 38 of 44
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March 2006
ADSP-21261
ENVIRONMENTAL CONDITIONS
The ADSP-21261 processor is rated for performance over the
commercial temperature range, TAMB = 0°C to 70°C.
THERMAL CHARACTERISTICS
Table 32 and Table 33 airflow measurements comply with
JEDEC standards JESD51-2 and JESD51-6 and the junction-to-
board measurement complies with JESD51-8. The junction-to-
case measurement complies with MIL-STD-883. All measure-
ments use a 2S2P JEDEC test board.
To determine the junction temperature of the device while on
the application PCB, use:
where:
TJ = junction temperature (°C)
TCASE = case temperature (°C) measured at the top center of the
package
ΨJT = junction-to-top (of package) characterization parameter =
typical value from the tables below
PD = power dissipation. See EE Note No. EE-216
Values of
θJA are provided for package comparison and PCB
design considerations.
θJA can be used for a first-order approxi-
mation of TJ by the equation:
where:
TA = ambient temperature (°C)
Values of
θJC are provided for package comparison and PCB
design considerations when an external heat sink is required.
Figure 33. Typical Output Delay or Hold vs. Load Capacitance
(at Ambient Temperature)
LOAD CAPACITANCE (pF)
7
0120
20
40
60
80
100
5
6
4
O
U
T
P
U
T
D
E
L
A
Y
O
R
H
O
L
D
(n
s
)
3
4
y = 0.0904x - 2.712
2
0
1
1
2
3
TJ
TCASE
Ψ
JT
PD
×
()
+
=
TJ
TA
θ
JA
PD
×
()
+
=
Table 32. Thermal Characteristics for 136-Ball BGA1
1 The thermal characteristics values provided in this table are modeled values.
Parameter
Condition
Typical
Unit
θJA
Airflow = 0 m/s
31.0
°C/W
θJMA
Airflow = 1 m/s
27.3
°C/W
θJMA
Airflow = 2 m/s
26.0
°C/W
θJC
6.99
°C/W
ΨJT
Airflow = 0 m/s
0.16
°C/W
ΨJMT
Airflow = 1 m/s
0.30
°C/W
ΨJMT
Airflow = 2 m/s
0.35
°C/W
Table 33. Thermal Characteristics for 144-Lead LQFP1
1 The thermal characteristics values provided in this table are modeled values.
Parameter
Condition
Typical
Unit
θJA
Airflow = 0 m/s
32.5
°C/W
θJMA
Airflow = 1 m/s
28.9
°C/W
θJMA
Airflow = 2 m/s
27.8
°C/W
θJC
7.8
°C/W
ΨJT
Airflow = 0 m/s
0.5
°C/W
ΨJMT
Airflow = 1 m/s
0.8
°C/W
ΨJMT
Airflow = 2 m/s
1.0
°C/W
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