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參數資料
| 型號： | ADSP-2181KST-160 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | 24-BIT, 20 MHz, OTHER DSP, PQFP128 |
| 封裝： | METRIC, PLASTIC, TQFP-128 |
| 文件頁數： | 26/32頁 |
| 文件大小： | 290K |
| 代理商： | ADSP-2181KST-160 |
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REV. D
ADSP-2181
–26–
CAPACIT IVE LOADING
Figures 22 and 23 show the capacitive loading characteristics of
the ADSP-2181.
C
L
– pF
R
0
50
100
150
200
250
25
15
10
5
0
20
Figure 22. Range of Output Rise Time vs. Load Capaci-
tance, C
L
(at Maximum Ambient Operating Temperature)
C
L
– pF
14
0
V
50
100
150
250
200
12
4
2
–2
10
8
16
6
–4
0
Figure 23. Range of Output Valid Delay or Hold vs. Load
Capacitance, C
L
(at Maximum Ambient Operating
Temperature)
T E ST CONDIT IONS
Output Disable T ime
Output pins are considered to be disabled when they have
stopped driving and started a transition from the measured
output high or low voltage to a high impedance state. T he out-
put disable time (t
DIS
) is the difference of t
MEASURED
and t
DECAY
,
as shown in the Output Enable/Disable diagram. T he time is the
interval from when a reference signal reaches a high or low volt-
age level to when the output voltages have changed by 0.5 V
from the measured output high or low voltage. T he decay time,
t
DECAY
, is dependent on the capacitive load, C
L
, and the current
load,
i
L
, on the output pin. It can be approximated by the fol-
lowing equation:
t
DECAY
=
C
L
×
0.5
V
i
L
from which
t
DIS
=
t
MEASURED
±
t
DECAY
is calculated. If multiple pins (such as the data bus) are dis-
abled, the measurement value is that of the last pin to stop
driving.
1.5V
INPUT
OR
OUTPUT
1.5V
Figure 24. Voltage Reference Levels for AC Measure-
ments (Except Output Enable/Disable)
Output E nable T ime
Output pins are considered to be enabled when they have made
a transition from a high-impedance state to when they start
driving. T he 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. If multiple pins
(such as the data bus) are enabled, the measurement value is
that of the first pin to start driving.
2.0V
1.0V
t
ENA
REFERENCE
SIGNAL
OUTPUT
t
DECAY
V
(MEASURED)
OUTPUT STOPS
DRIVING
OUTPUT STARTS
DRIVING
t
DIS
t
MEASURED
V
(MEASURED)
V
OH
(MEASURED) – 0.5V
V
OL
(MEASURED) +0.5V
HIGH-IMPEDANCE STATE. TEST CONDITIONS CAUSE
THIS VOLTAGE LEVEL TO BE APPROXIMATELY 1.5V.
V
(MEASURED)
V
(MEASURED)
Figure 25. Output Enable/Disable
TO
OUTPUT
PIN
50pF
+1.5V
I
OH
I
OL
Figure 26. Equivalent Device Loading for AC Measure-
ments (Including All Fixtures)
相關PDF資料 |
PDF描述 |
|---|---|
| ADSP-2181 | ADSP-2100 Family DSP Microcomputers |
| ADSP-2181BST-115 | DSP Microcomputer |
| ADSP-2181BST-133 | DSP Microcomputer |
| ADSP2181 | DSP Microcomputer |
| ADSP-2183KST-115 | DSP Microcomputer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADSP-2181KST-160R | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 40MHz 40MIPS 128-Pin LQFP T/R |
| ADSP-2181KSTZ-115 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADSP-2181KSTZ-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.3MHz 33.3MIPS 128-Pin LQFP 制造商:Analog Devices 功能描述:MICROCOMPUTER 16BIT 33MIPS SMD |
| ADSP-2181KSTZ-160 | 功能描述:IC DSP CONTROLLER 16BIT 128TQFP 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 |
| ADSP-2181KSZ-133 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:MICROCOMPUTER 16BIT 33MIPS SMD |
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