參數(shù)資料
型號： ADSP-21267SKSTZ-X
廠商： ANALOG DEVICES INC
元件分類： 數(shù)字信號處理
英文描述： Preliminary Technical Data
中文描述： 16-BIT, 50 MHz, OTHER DSP, PQFP144
封裝： MS-026BFB, LQFP-144
文件頁數(shù)： 37/44頁
文件大?。?/td> 454K
代理商： ADSP-21267SKSTZ-X
ADSP-21267
Rev. PrA
|
Page 37 of 44
|
January 2004
PRELIMINARY TECHNICAL DATA
ENVIRONMENTAL CONDITIONS
The ADSP-21267 processor is rated for performance over the
commercial temperature range, T
AMB
= 0°C to 70°C.
THERMAL CHARACTERISTICS
The ADSP-21267 is offered in 144-lead LQFP and 136-ball BGA
packages
Table 31
and
Table 32
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:
T
J
= Junction temperature
0
C
T
CASE
= Case temperature (
0
C) measured at the top center of the
package
Ψ
JT
= Junction-to-Top (of package) characterization parameter
= Typical value from the tables below
P
D
= Power dissipation see EE Note #216
Values of
θ
JA
are provided for package comparison and PCB
design considerations.
θ
JA
can be used for a 1
st
order approxima-
tion of T
J
by the equation:
Where:
T
A
= Ambient Temperature
0
C
Values of
θ
JC
are provided for package comparison and PCB
design considerations when an external heatsink is required.
Values of
θ
JB
are provided for package comparison and PCB
design considerations.
Figure 33. Typical Output Delay or Hold vs. Load Capacitance
(at Ambient Temperature)
LOAD CAPACITANCE - pF
7
0
120
20
40
60
80
100
5
6
4
O
3
-4
2
0
1
-1
-2
-3
TBD
TJ
TCASE
Ψ
J
T
PD
×
(
)
+
=
TJ
TA
θ
JA
PD
×
(
)
+
=
Table 31. Thermal Characteristics for 136 Ball BGA
Parameter
θ
JA
θ
JMA
θ
JMA
θ
JB
θ
JC
Ψ
JT
Ψ
JMT
Ψ
JMT
Condition
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Typical
28.2
24.4
23.3
20.1
7.0
0.1
0.3
0.4
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Table 32. Thermal Characteristics for 144 Lead LQFP
Parameter
θ
JA
θ
JMA
θ
JMA
θ
JC
Ψ
JT
Ψ
JMT
Ψ
JMT
Typical
32.5
28.9
27.8
7.8
0.5
0.8
1.0
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
Airflow = 0 m/s
Airflow = 1 m/s
Airflow = 2 m/s
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相關(guān)代理商/技術(shù)參數(shù)
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ADSP-21362 制造商:AD 制造商全稱:Analog Devices 功能描述:SHARC Processor
adsp-21362bbc-1aa 制造商:Analog Devices 功能描述:
ADSP-21362BBCZ-1AA 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 333 MHz Processor includes DTCP/SPDIF 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 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(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 安裝風格:SMD/SMT
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