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參數(shù)資料
| 型號： | AD7822 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1-Channel Sampling ADCs(2MSPS,單通道采樣8位A/D轉(zhuǎn)換器) |
| 中文描述： | 單通道采樣ADC（2MSPS，單通道采樣8位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 238K |
| 代理商： | AD7822 |
AD7822/AD7825/AD7829
–13–
REV. 0
PARALLE L INT E RFACE
T he parallel interface of the AD7822, AD7825 and AD7829 is
eight bits wide. Figure 22 shows a timing diagram illustrating
the operational sequence of the AD7822/AD7825/AD7829
parallel interface. T he multiplexer address is latched into the
AD7822/AD7825/AD7829 on the falling edge of the
RD
input.
T he on-chip track/hold goes into hold mode on the falling
edge of
CONVST
and a conversion is also initiated at this
point. When the conversion is complete, the end of conversion
line (
EOC
) pulses low to indicate that new data is available in
the output register of the AD7822, AD7825 and AD7829. T he
EOC
pulse will stay logic low for a maximum time of 110 ns.
However, the
EOC
pulse can be reset high by a rising edge of
Figure 22. AD7822/AD7825/AD7829 Parallel Port Timing
RD
. T his
EOC
line can be used to drive an edge-triggered inter-
rupt of a microprocessor.
CS
and
RD
going low accesses the 8-
bit conversion result. It is possible to tie
CS
permanently low
and use only
RD
to access the data. In systems where the part is
interfaced to a gate array or ASIC, this
EOC
pulse can be ap-
plied to the
CS
and
RD
inputs to latch data out of the AD7822,
AD7825 and AD7829 and into the gate array or ASIC. T his
means that the gate array or ASIC does not need any conversion
status recognition logic and it also eliminates the logic required in
the gate array or ASIC to generate the read signal for the AD7822,
AD7825 and AD7829.
CONVST
EOC
CS
RD
DB0-DB7
A0-A2
t
1
t
4
t
5
t
6
t
7
t
8
t
3
t
9
t
10
t
11
t
12
t
13
VALID
DATA
CNEXT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7822_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel Sampling ADCs |
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| AD7822BNZ | 功能描述:IC ADC 8BIT 1CHAN 2MSPS 20DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7822BNZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel Sampling ADCs |
| AD7822BR | 功能描述:IC ADC 8BIT 1CH 2MSPS 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
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