- 您現在的位置：買賣IC網 > PDF目錄374037 > ADSP-2195MKST-160X (ANALOG DEVICES INC) LM2991 Negative Low Dropout Adjustable Regulator; Package: TO-263; No of Pins: 5; Qty per Container: 45; Container: Rail PDF資料下載
參數資料
| 型號： | ADSP-2195MKST-160X |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字信號處理 |
| 英文描述： | LM2991 Negative Low Dropout Adjustable Regulator; Package: TO-263; No of Pins: 5; Qty per Container: 45; Container: Rail |
| 中文描述： | 16-BIT, 160 MHz, OTHER DSP, PQFP144 |
| 封裝： | METRIC, PLASTIC, LQFP-144 |
| 文件頁數： | 54/68頁 |
| 文件大小： | 951K |
| 代理商： | ADSP-2195MKST-160X |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁當前第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
54
REV. PrA
For current information contact Analog Devices at 800/262-5643
ADSP-2195
September 2001
The P
EXT
equation is calculated for each class of pins that
can drive as shown in
Table 24
.
A typical power consumption can now be calculated for
these conditions by adding a typical internal power dissipa-
tion with the formula in
Figure 30
.
Where:
P
EXT
is from
Table 24
P
INT
is I
DDINT
2.5V, using the calculation I
DDINT
listed in
Power Dissipation on page 52
Note that the conditions causing a worst-case P
EXT
are
different from those causing a worst-case P
INT
. Maximum
P
INT
cannot occur while 100% of the output pins are
switching from all ones to all zeros. Note also that it is not
common for an application to have 100% or even 50% of
the outputs switching simultaneously.
Test Conditions
The DSP is tested for output enable, disable, and hold time.
Output Disable Time
Output pins are considered to be disabled when they stop
driving, go into a high impedance state, and start to decay
from their output high or low voltage. The time for the
voltage on the bus to decay by – V is dependent on the
capacitive load, C
L
and the load current, I
L
. This decay time
can be approximated by the equation in
Figure 31
.
The output disable time t
DIS
is the difference between
t
MEASURED
and t
DECAY
as shown in
Figure 32
. The time
t
MEASURED
is the interval from when the reference signal
switches to when the output voltage decays –V from the
measured output high or output low voltage. The t
DECAY
is
calculated with test loads C
L
and I
L
, and with –V equal to
0.5 V.
Output Enable Time
Output pins are considered to be enabled when they have
made a transition from a high impedance state to when they
start driving. The output enable time t
ENA
is the interval
from when a reference signal reaches a high or low voltage
level to when the output has reached a specified high or low
trip point, as shown in the Output Enable/Disable diagram
(
Figure 32
). If multiple pins (such as the data bus) are
enabled, the measurement value is that of the first pin to
start driving.
Table 24. P
EXT
Calculation
Pin Type
# of Pins
% Switching
C
f
V
DD
2
= P
EXT
Address
15
50
TBD pF
25.0 MHz
10.9 V
= TBDW
MSx
1
0
TBD pF
25.0 MHz
10.9 V
= TBDW
WR
1
—
TBD pF
25 MHz
10.9 V
= TBDW
Data
16
50
TBD pF
25.0 MHz
10.9 V
= TBDW
CLKOUT
1
—
TBD pF
100 MHz
10.9 V
= TBDW
P
EXT
=TBDW
Figure 30. P
TOTAL
(Typical) Calculation
Figure 31. Decay Time Calculation
P
TOTAL
P
=
EXT
P
INT
+
t
DECAY
C
V
I
L
---------------
=
Figure 32. Output Enable/Disable
3
(
(
*(
(
:(
3
(
(
.'(
.'(
.
(
!.)(
(
3
3
相關PDF資料 |
PDF描述 |
|---|---|
| ADSP-2196 | DSP Microcomputer |
| ADSP-2196MBCA-140X | DSP Microcomputer |
| ADSP-2196MBST-140X | DSP Microcomputer |
| ADSP-2196MKCA-160X | DSP Microcomputer |
| ADSP-2196MKST-160X | DSP Microcomputer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| adsp-2196mbca-140 | 制造商:Analog Devices 功能描述: |
| adsp-2196mbst-140 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 140MHz 140MIPS 144-Pin LQFP 制造商:Rochester Electronics LLC 功能描述: |
| ADSP-2196MBST-140Z | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 140MHz 140MIPS 144-Pin LQFP |
| ADSP-2196MKST-160 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 160MHz 160MIPS 144-Pin LQFP 制造商:Analog Devices 功能描述:16-Bit DSP 160 MIPs 2.5V 40 Kbytes |
| ADSP-2196MKSTZ-160 | 功能描述:IC DSP CONTROLLER 16BIT 144-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數字式信號處理器） 系列:ADSP-21xx 標準包裝:40 系列:TMS320DM64x, DaVinci™ 類型:定點 接口:I²C，McASP，McBSP 時鐘速率:400MHz 非易失內存:外部 芯片上RAM:160kB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:0°C ~ 90°C 安裝類型:表面貼裝 封裝/外殼:548-BBGA，FCBGA 供應商設備封裝:548-FCBGA（27x27） 包裝:托盤 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA |
發布緊急采購，3分鐘左右您將得到回復。