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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)： | 14/20頁 |
| 文件大?。?/td> | 238K |
| 代理商： | AD7822 |
AD7822/AD7825/AD7829
–14–
REV. 0
MICROPROCE SSOR INT E RFACING
T he parallel port on the AD7822/AD7825/AD7829 allows the
ADCs to be interfaced to a range of many different micro-
controllers. T his section explains how to interface the AD7822,
AD7825 and AD7829 with some of the more common micro-
controller parallel interface protocols.
AD7822/AD7825/AD7829 to 8051
Figure 23 below shows a parallel interface between the AD7822,
AD7825 and AD7829 and the 8051 microcontroller. T he
EOC
signal on the AD7822, AD7825 and AD7829 provides an inter-
rupt request to the 8051 when a conversion ends and data is
ready. Port 0 of the 8051 may serve as an input or output port,
or as in this case when used together, may be used as a bidirec-
tional low order address and data bus. T he address latch enable
output of the 8051 is used to latch the low byte of the address
during accesses to the device, while the high order address byte
is supplied from Port 2. Port 2 latches remain stable when the
AD7822, AD7825 and AD7829 are addressed, as they do not
have to be turned around (set to 1) for data input as is the case for
Port 0.
AD0-AD7
ALE
A8-A15
RD
INT
8051*
LATCH
DECODER
DB0-DB7
RD
EOC
AD7822/25/29*
CS
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 23. Interfacing to the 8051
AD7822/AD7825/AD7829 to PIC16C6x/7x
Figure 24 shows a parallel interface between the AD7822,
AD7825 and AD7829 and the PIC 16C64/65/74. T he
EOC
signal on the AD7822, AD7825 and AD7829 provides an
interrupt request to the microcontroller when a conversion
begins. Of the PIC16C6x/7x range of microcontrollers only the
PIC16C64/65/74 can provide the option of a parallel slave port.
Port D of the microcontroller will operate as an 8-bit wide par-
allel slave port when control bit PSPMODE in the T RISE regis-
ter is set. Setting PSPMODE enables the port pin RE0 to be the
RD
output and RE2 to be the
CS
(chip select) output. For
this functionality, the corresponding data direction bits of the
T RISE register must be configured as outputs (reset to 0). See
PIC16/17 Microcontroller User Manual.
PSP0-PSP7
RD
INT
PIC16C6x/7x*
DB0-DB7
RD
EOC
AD7822/25/29*
CS
*ADDITIONAL PINS OMITTED FOR CLARITY
CS
Figure 24. Interfacing to the PIC16C6x/7x
AD7822/AD7825/AD7829 to ADSP-21xx
Figure 25 below shows a parallel interface between the AD7822,
AD7825 and AD7829 and the ADSP-21xx series of DSPs. As
before, the
EOC
signal on the AD7822, AD7825 and AD7829
provides an interrupt request to the DSP when a conversion
ends.
D7-D0
RD
IRQ
ADSP-21xx*
DB0-DB7
RD
EOC
AD7822/25/29*
CS
*ADDITIONAL PINS OMITTED FOR CLARITY
DMS
EN
ADDRESS
DECODE
LOGIC
A13-A0
Figure 25. Interfacing to the ADSP-21xx
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| 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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