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參數(shù)資料
| 型號： | ADSP-2101BG-80 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | ADSP-2100 Family DSP Microcomputers |
| 中文描述： | 24-BIT, 20 MHz, OTHER DSP, CPGA68 |
| 封裝： | CERAMIC, PGA-68 |
| 文件頁數(shù)： | 28/64頁 |
| 文件大?。?/td> | 666K |
| 代理商： | ADSP-2101BG-80 |
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ADSP-21xx
SPECIFICATIONS (ADSP-2103/2162/2164)
–28–
REV. B
T he decay time, t
DECAY
, is dependent on the capacitative load,
C
L
, and the current 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.
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
E NA
) 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 Figure 27. If multiple pins (such as the data bus)
are enabled, the measurement value is that of the first pin to
start driving.
T E ST CONDIT IONS
Figure 26 shows voltage reference levels for ac measurements.
Figure 26. Voltage Reference Levels for AC Measurements
(Except Output Enable/Disable)
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
output disable time (t
DIS
) is the difference of t
MEASURED
and
t
DECAY
, as shown in Figure 27. T he time t
MEASURED
is the
interval from when a reference signal reaches a high or low
voltage level to when the output voltages have changed by 0.5 V
from the measured output high or low voltage.
INPUT
OUTPUT
V
DD
2
V
DD
2
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)
TO
OUTPUT
PIN
50pF
I
OH
I
OL
V
DD
2
Figure 27. Output Enable/Disable
Figure 28. Equivalent Device Loading for AC Measurements
(Except Output Enable/Disable)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-2101BGZ-100 | 制造商:Analog Devices 功能描述:DSP FIX PT 16BIT 25MHZ 25MIPS 68CPGA - Trays |
| ADSP-2101BP-100 | 功能描述:IC DSP CONTROLLER 16BIT 68PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標準包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應商設備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-2101BP-40 | 制造商:Analog Devices 功能描述: |
| ADSP-2101BP-50 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADSP-2101BP-66 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 16.67MHz 16.67MIPS 68-Pin PLCC 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:SEMICONDUCTOR ((NW)) |
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