参数资料
型号: ADSP-21160MKB-80
厂商: Analog Devices Inc
文件页数: 37/52页
文件大小: 0K
描述: IC DSP CONTROLLER 32BIT 400 BGA
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: 80MHz
非易失内存: 外部
芯片上RAM: 512kB
电压 - 输入/输出: 3.30V
电压 - 核心: 2.50V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 400-BBGA
供应商设备封装: 400-PBGA(27x27)
包装: 托盘
ADSP-21160M
–42–
REV. 0
Output Drive Currents
Figure 29 shows typical I–V characteristics for the output drivers of the ADSP-21160M. The curves represent the current
drive capability of the output drivers as a function of output voltage.
Power Dissipation
Total power dissipation has two components, one due to internal circuitry and one due to the switching of external output
drivers.
Internal power dissipation is dependent on the instruction execution sequence and the data operands involved. Using the
current specifications (I
DDINPEAK, IDDINHIGH, IDDINLOW, IDDIDLE) from Electrical Characteristics on page 13 and the current-ver-
sus-operation information in Table 29, engineers can estimate the ADSP-21160M’s internal power supply (V
DDINT) input
current for a specific application, according to the following formula:
The external component of total power dissipation is caused by the switching of output pins. Its magnitude depends on:
the number of output pins that switch during each cycle (O)
the maximum frequency at which they can switch (f)
their load capacitance (C)
their voltage swing (VDD)
and is calculated by:
P
EXT = O × C × VDD
2 × f
Figure 29. ADSP-21160M Typical Drive Currents
6285&( 9''(;7 92/7$*( ± 9
±
62
8
5
&
(
9
''(
;7
&
85
5(
1
7
±
P
$
±
9''(;7 9 &
% Peak I
DDINPEAK
×
% High I
DDINHI GH
×
% Low I
DDI NLOW
×
+ % Idle I
DDIDLE
×
I
DDI NT
--------------------------------------------------
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