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| 型號： | AD7890ARZ-4REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/28頁 |
| 文件大小： | 0K |
| 描述： | IC DAS 12BIT 8CH 24-SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 分辨率（位）： | 12 b |
| 采樣率（每秒）： | 117k |
| 數(shù)據(jù)接口： | 串行 |
| 電壓電源： | 單電源 |
| 電源電壓： | 5V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 帶卷 (TR) |
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AD7890
Rev. C | Page 19 of 28
SIMPLIFYING THE INTERFACE
To minimize the number of interconnect lines to the AD7890,
the user can connect the RFS and TFS lines of the AD7890
together and read and write from the part simultaneously. In
this case, new control register data should be provided on the
DATA IN line selecting the input channel and possibly
providing a conversion start command while the part provides
the result from the conversion just completed on the
DATA OUT line.
In the self-clocking mode, this means that the part provides all
the signals for the serial interface. It does require that the
microprocessor has the data to be written to the control register
available in its output register when the part brings the TFS line
low. In the external clocking mode, it means that the user only
has to supply a single frame synchronization signal to control
both the read and write operations.
Care must be taken with this scheme that the read operation is
completed before the next conversion starts, if the user wants to
obtain optimum performance from the part. In the case of the
software conversion start, the conversion command is written
to the control register on the sixth serial clock edge. However,
the read operation continues for another 10 serial clock cycles.
To avoid reading during the sampling instant or during
conversion, the user should ensure that the internal pulse width
is sufficiently long (by choosing CEXT) so that the read operation
is completed before the next conversion sequence begins.
Failure to do this results in significantly degraded performance
from the part, both in terms of signal-to-noise ratio and dc
parameters. In the case of a hardware conversion start, the user
should ensure that the delay between the sixth falling edge of
the serial clock in the write operation and the next rising edge
of CONVST is greater than the internal pulse width.
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| AD7890BN-10 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7890BN-2 | 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:8-CH,100K,12-BIT ADC - Bulk |
| AD7890BN-4 | 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin PDIP |
| AD7890BNZ-10 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| AD7890BNZ-2 | 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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