参数资料
型号: ADSP-21369BSWZ-2A
厂商: Analog Devices Inc
文件页数: 49/64页
文件大小: 0K
描述: IC DSP 32BIT 333MHZ 208-LQFP
标准包装: 1
系列: SHARC®
类型: 浮点
接口: DAI,DPI
时钟速率: 333MHz
非易失内存: ROM(768 kB)
芯片上RAM: 256kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.20V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 208-LQFP 裸露焊盘
供应商设备封装: 208-LQFP-EP(28x28)
包装: 托盘
Rev. F
|
Page 53 of 64
|
October 2013
THERMAL CHARACTERISTICS
The ADSP-21367/ADSP-21368/ADSP-21369 processors are
rated for performance over the temperature range specified in
Table 43 and Table 44 airflow measurements comply with
JEDEC standards JESD51-2 and JESD51-6 and the junction-to-
board measurement complies with JESD51-8. Test board design
complies with JEDEC standards JESD51-9 (BGA_ED) and
JESD51-8 (LQFP_EP). The junction-to-case measurement com-
plies with MIL-STD-883. All measurements use a 2S2P JEDEC
test board.
The LQFP-EP package requires thermal trace squares and ther-
mal vias, to an embedded ground plane, in the PCB. Refer to
JEDEC standard JESD51-5 for more information.
To determine the junction temperature of the device while on
the application PCB, use:
where:
TJ = junction temperature (C)
TTOP = case temperature (C) measured at the top center of the
package
JT = junction-to-top (of package) characterization parameter is
the typical value from Table 43 and Table 44.
PD = power dissipation (see Engineer-to-Engineer Note EE-299)
Values of
JA are provided for package comparison and PCB
design considerations. JA can be used for a first-order approxi-
mation of TJ by the equation:
where:
TA = ambient temperature (C)
Values of
JC are provided for package comparison and PCB
design considerations when an external heat sink is required.
This is only applicable when a heat sink is used.
Values of
JB are provided for package comparison and PCB
design considerations. The thermal characteristics values pro-
vided in Table 43 and Table 44 are modeled values @ 2 W.
Figure 47. Typical Output Delay or Hold vs. Load Capacitance
(at Junction Temperature)
Figure 48. SDCLK Typical Output Delay or Hold vs. Load Capacitance
(at Junction Temperature)
LOAD CAPACITANCE (pF)
0
200
50
100
150
10
8
O
U
T
P
U
T
D
E
L
A
Y
O
R
H
O
L
D
(n
s
)
-
4
6
0
4
2
-
2
y = 0.0488x - 1.5923
LOAD CAPACITANCE (pF)
6
-
2
0100
2
0
8
4
R
IS
E
A
N
D
F
A
L
T
IM
E
S
(n
s
)
200
150
50
y = 0.0256x - 0.021
Table 43. Thermal Characteristics for 256-Ball BGA_ED
Parameter
Condition
Typical
Unit
JA
Airflow = 0 m/s
12.5
C/W
JMA
Airflow = 1 m/s
10.6
C/W
JMA
Airflow = 2 m/s
9.9
C/W
JC
0.7
C/W
JB
5.3
C/W
JT
Airflow = 0 m/s
0.3
C/W
JMT
Airflow = 1 m/s
0.3
C/W
JMT
Airflow = 2 m/s
0.3
C/W
Table 44. Thermal Characteristics for 208-Lead LQFP EPAD
(With Exposed Pad Soldered to PCB)
Parameter
Condition
Typical
Unit
JA
Airflow = 0 m/s
17.1
C/W
JMA
Airflow = 1 m/s
14.7
C/W
JMA
Airflow = 2 m/s
14.0
C/W
JC
9.6
C/W
JT
Airflow = 0 m/s
0.23
C/W
JMT
Airflow = 1 m/s
0.39
C/W
JMT
Airflow = 2 m/s
0.45
C/W
JB
Airflow = 0 m/s
11.5
C/W
JMB
Airflow = 1 m/s
11.2
C/W
JMB
Airflow = 2 m/s
11.0
C/W
TJ
TTOP
JT
PD
+
=
TJ
TA
JA
PD
+
=
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