参数资料
型号: ADSP-21161NCCA-100
厂商: Analog Devices Inc
文件页数: 51/60页
文件大小: 0K
描述: IC DSP CONTROLLER 32BIT 225MBGA
产品培训模块: SHARC Processor Overview
标准包装: 1
系列: SHARC®
类型: 浮点
接口: 主机接口,连接端口,串行端口
时钟速率: 100MHz
非易失内存: 外部
芯片上RAM: 128kB
电压 - 输入/输出: 3.30V
电压 - 核心: 1.80V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 225-BGA,CSPBGA
供应商设备封装: 225-CSPBGA(17x17)
包装: 托盘
其它名称: ADSP-21161NCCA100
Rev. C
|
Page 55 of 60
|
January 2013
Capacitive Loading
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see Figure 36 on Page 54). Figure 38 shows
graphically how output delays and holds vary with load capaci-
tance. (Note that this graph or derating does not apply to output
disable delays; see Output Disable Time on Page 54.) The graphs
of Figure 38, Figure 39, and Figure 40 may not be linear outside
the ranges shown for Typical Output Delay vs. Load Capaci-
tance and Typical Output Rise Time (20% – 80%, V = Min) vs.
Load Capacitance.
ENVIRONMENTAL CONDITIONS
The thermal characteristics in which the DSP is operating influ-
ence performance.
Thermal Characteristics
The ADSP-21161N is packaged in a 225-ball chip scale package
ball grid array (CSP_BGA). The ADSP-21161N is specified for a
case temperature (TCASE). To ensure that the TCASE data sheet
specification is not exceeded, a heatsink and/or an air flow
source may be used. Use the center block of ground pins
(CSP_BGA balls: F6-10, G6-10, H6-10, J6-10, K6-10) to provide
thermal pathways to the printed circuit board’s ground plane. A
heatsink should be attached to the ground plane (as close as pos-
sible to the thermal pathways) with a thermal adhesive.
where:
TCASE = Case temperature (measured on top surface
of package)
TAMB = Ambient temperature °C
PD = Power dissipation in W (this value depends upon the
specific application; a method for calculating PD is shown
under Power Dissipation).
CA = Value from Table 39.
Figure 38. Typical Output Delay or Hold vs. Load Capacitance (at Max Case
Temperature)
Figure 39. Typical Output Rise/Fall Time (20% – 80%, VDDEXT = Max)
Figure 40. Typical Output Rise/Fall Time (20% – 80%, VDDEXT = Min)
LOAD CAPACITANCE – pF
25
–5
0210
30
60
90
120
150
180
20
15
10
5
NOMINAL
Y= 0.0835X - 2.42
O
U
T
P
U
T
D
E
L
A
Y
O
R
H
O
L
D
n
s
LOAD CAPACITANCE – pF
16.0
8.0
0
200
20
40
60
80
100
120
140
160
180
14.0
12.0
4.0
2.0
10.0
6.0
FALL TIME
RISETIME
Y = 0.0743X+ 1.5613
R
IS
E
A
N
D
F
A
L
T
IM
E
S
n
s
(0
.6
9
4
V
T
O
2
.7
7
V
,
2
0
%
T
O
8
0
%
)
Y = 0.0414X + 2.0128
LOAD CAPACITANCE – pF
16.0
8.0
0
0200
20
40
60
80
100
120
140
160
180
14.0
12.0
4.0
2.0
10.0
6.0
FALL TIME
RISETIME
Y= 0.0773X+ 1.4399
R
IS
E
A
N
D
F
A
L
T
IM
E
S
n
s
(0
.6
9
4
V
T
O
2
.7
7
V
,
2
0
%
T
O
8
0
%
)
Y = 0.0417X + 1.8674
Table 39. Airflow Over Package Versus CA
Airflow (Linear Ft./Min.)
0
200
400
CA (°C/W)JC
1 = 6.8°C/W.
17.9
15.2
13.7
T
CASE
T
AMB
PD
CA
+
=
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