參數(shù)資料
型號: ADSP-2185LBSTZ-210
廠商: Analog Devices Inc
文件頁數(shù): 31/48頁
文件大小: 0K
描述: IC DSP CONTROLLER 16BIT 100LQFP
標(biāo)準(zhǔn)包裝: 1
系列: ADSP-21xx
類型: 定點(diǎn)
接口: 主機(jī)接口,串行端口
時(shí)鐘速率: 52MHz
非易失內(nèi)存: 外部
芯片上RAM: 80kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 3.30V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應(yīng)商設(shè)備封裝: 100-LQFP(14x14)
包裝: 托盤
ADSP-2184L/ADSP-2185L/ADSP-2186L/ADSP-2187L
Rev. C
|
Page 37 of 48
|
January 2008
POWER DISSIPATION
To determine total power dissipation in a specific application,
the following equation should be applied for each output:
C
VDD
2
f
where:
C is load capacitance.
f is the output switching frequency.
Example:
In an application where external data memory is used
and no other outputs are active, power dissipation is calculated
as follows:
Assumptions:
External data memory is accessed every cycle with 50% of
the address pins switching.
External data memory writes occur every other cycle with
50% of the data pins switching.
Each address and data pin has a 10 pF total load at the pin.
Application operates at VDD = 3.3 V and tCK = 30 ns.
Total Power Dissipation = PINT + (C
VDD
2
f)
where:
P INT is the internal power dissipation from Figure 28 through
(C
VDD
2
f) is calculated for each output, as in the example in
Table 27. Example Power Dissipation Calculation1
Parameters
No. of Pins
× C (pF)
× VDD
2 (V)
× f (MHz)
PD (mW)
Address, DMS
810
3.3
2
33.3
29.0
Data Output, WR
910
3.32
16.67
16.3
RD
110
3.32
16.67
1.8
CLKOUT
1
10
3.32
33.3
3.6
= 50.7
1 Total power dissipation for this example is P
INT + 50.7 mW.
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