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參數(shù)資料
| 型號： | ADSP-2171BST-104 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | DSP Microcomputer |
| 中文描述： | 24-BIT, 13 MHz, OTHER DSP, PQFP128 |
| 封裝： | PLASTIC, TQFP-128 |
| 文件頁數(shù)： | 30/52頁 |
| 文件大?。?/td> | 664K |
| 代理商： | ADSP-2171BST-104 |
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REV. A
–30–
ADSP-2171/ADSP-2172/ADSP-2173
ADSP-2171/ADSP-2172
CAPACIT IVE LOADING
Figures 19 and 20 show the capacitive loading characteristics of
the ADSP-2171/ADSP-2172.
R
28
12
4
8
24
16
20
25
150
125
100
75
50
C
L
– pF
V
DD
= 4.5V
Figure 19. Typical Output Rise Time vs. Load Capacitance,
C
L
(at Maximum Ambient Operating Temperature)
+14
+4
–2
+2
+12
+8
+10
25
150
125
100
75
50
C
L
– pF
NOMINAL
V
Figure 20. Typical 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 out-
put high or low voltage to a high impedance state. T he output
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 capacitative load, C
L
, and the cur-
rent load,
i
L
, on the output pin. It can be approximated by the
following 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.
3.0V
1.5V
0.0V
2.0V
1.5V
0.3V
INPUT
OUTPUT
Figure 21. Voltage Reference Levels for AC Measure-
ments (Except Output Enable/Disable)
Output E nable T ime
Output pins are considered to be enabled when that have made
a transition from a high-impedance state to when they start driv-
ing. 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
OH
(MEASURED)
OUTPUT STOPS
DRIVING
OUTPUT STARTS
DRIVING
t
DIS
t
MEASURED
V
OL
(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
OH
(MEASURED)
V
OL
(MEASURED)
Figure 22. Output Enable/Disable
TO
OUTPUT
PIN
50pF
+1.5V
I
OH
I
OL
Figure 23. Equivalent Device Loading for AC Measure-
ments (Including All Fixtures)
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| ADSP-2172 | DSP Microcomputer(DSP 微計算機(jī)) |
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| ADSP-2171BSZ-133 | 功能描述:IC DSP CONTROLLER 16BIT 128PQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標(biāo)準(zhǔn)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(nèi)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，F(xiàn)CBGA 供應(yīng)商設(shè)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 |
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| ADSP-2171KS-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.33MHz 33MIPS 128-Pin PQFP 制造商:Rochester Electronics LLC 功能描述:16BIT FXD PT PROC 33MIPS - Bulk 制造商:Analog Devices 功能描述:DSP microcomputer 33.33 MHz speed 1 ti |
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