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參數資料
| 型號： | AD7829 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 8-Channel Sampling ADCs(2MSPS,8通道采樣8位A/D轉換器) |
| 中文描述： | 8通道采樣ADC（2MSPS，8通道采樣8位的A / D轉換器） |
| 文件頁數： | 13/20頁 |
| 文件大小： | 238K |
| 代理商： | AD7829 |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7829-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC |
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| AD7829BNZ | 制造商:Analog Devices 功能描述:ADC Single Semiflash 2Msps 8-bit Parallel 28-Pin PDIP W 制造商:Analog Devices 功能描述:IC 8BIT ADC 7829 DIP28 |
| AD7829BNZ1 | 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 |
| AD7829BR | 制造商:Rochester Electronics LLC 功能描述:8-CHNL 2MSPS PARALLEL 8-BIT ADC I.C. - Bulk 制造商:Analog Devices 功能描述:IC 8-BIT ADC |
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