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參數(shù)資料
| 型號： | EVAL-AD7984SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7984 |
| 標準包裝： | 1 |
| 系列： | PulSAR® |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 18 |
| 采樣率（每秒）： | 1.33M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 輸入范圍： | ±VREF |
| 在以下條件下的電源（標準）： | 10.5mW @ 1.33MSPS |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7984 |
| 已供物品： | 板 |
AD7984
Rev. A | Page 17 of 24
CS MODE, 3-WIRE WITHOUT BUSY INDICATOR
This mode is usually used when a single AD7984 is connected
to an SPI-compatible digital host. The connection diagram is
shown in Figure 28, and the corresponding timing is given in
With SDI tied to VIO, a rising edge on CNV initiates a
conversion, selects the CS mode, and forces SDO to high
impedance. When a conversion is initiated, it continues until
completion irrespective of the state of CNV. This can be useful,
for example, to bring CNV low to select other SPI devices, such
as analog multiplexers; however, CNV must be returned high
before the minimum conversion time elapses and then held
high for the maximum possible conversion time to avoid the
generation of the busy signal indicator. When the conversion is
complete, the AD7984 enters the acquisition phase and goes
into standby mode. When CNV goes low, the MSB is output
onto SDO. The remaining data bits are clocked by subsequent
SCK falling edges. The data is valid on both SCK edges. Although
the rising edge can be used to capture the data, a digital host
using the SCK falling edge allows a faster reading rate, provided
it has an acceptable hold time. After the 18th SCK falling edge or
when CNV goes high (whichever occurs first), SDO returns to
high impedance.
AD7984
SDI
SDO
CNV
SCK
CONVERT
DATA IN
CLK
DIGITAL HOST
VIO
06
97
3-
0
18
Figure 28. CS Mode, 3-Wire Without Busy Indicator Connection Diagram (SDI High)
SDO
D17
D16
D15
D1
D0
tDIS
SCK
1
2
3
16
17
18
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
CNV
CONVERSION
ACQUISITION
tCONV
tCYC
ACQUISITION
SDI = 1
tCNVH
tACQ
tEN
06
97
3-
0
19
Figure 29. CS Mode, 3-Wire Without Busy Indicator Serial Interface Timing (SDI High)
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| EVAL-AD7988-5SDZ | 功能描述:BAORD EVAL FOR AD7988-5 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:PulSAR® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7991EBZ | 功能描述:BOARD EVAL FOR AD7991 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7991EBZ | 制造商:Analog Devices 功能描述:AD7991, ADC, I2C, EVALUATION BOARD |
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