参数资料
| 型号： | AD7984BCPZ-RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT 1.33MSPS 10LFCSP |
| 设计资源： | Converting a Single-Ended Signal with AD7984 Differential PulSAR ADC (CN0033) |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| 位数： | 18 |
| 采样率（每秒）： | 1.33M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 14mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘，CSP |
| 供应商设备封装： | 10-LFCSP-WD（3x3） |
| 包装： | 标准包装 |
| 输入数目和类型： | 1 个差分，单极 |
| 其它名称： | AD7984BCPZ-RL7DKR |
AD7984
Rev. A | Page 18 of 24
CS MODE, 3-WIRE WITH BUSY INDICATOR
This mode is usually used when a single AD7984 is connected
to an SPI-compatible digital host having an interrupt input.
The connection diagram is shown in Figure 30, and the
corresponding timing is given in Figure 31.
With SDI tied to VIO, a rising edge on CNV initiates a
conversion, selects the CS mode, and forces SDO to high
impedance. SDO is maintained in high impedance until the
completion of the conversion irrespective of the state of CNV.
Prior to the minimum conversion time, CNV can be used to
select other SPI devices, such as analog multiplexers, but CNV
must be returned low before the minimum conversion time
elapses and then held low for the maximum possible conversion
time to guarantee the generation of the busy signal indicator.
When the conversion is complete, SDO goes from high
impedance to low impedance. With a pull-up on the SDO line,
this transition can be used as an interrupt signal to initiate the
data reading controlled by the digital host. The AD7984 then
enters the acquisition phase and goes into standby mode. The
data bits are then clocked out, MSB first, 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 optional 19th SCK falling edge
or when CNV goes high (whichever occurs first), SDO returns
to high impedance.
If multiple AD7984s are selected at the same time, the SDO
output pin handles this contention without damage or induced
latch-up. Meanwhile, it is recommended to keep this contention
as short as possible to limit extra power dissipation.
AD7984
SDI
SDO
CNV
SCK
CONVERT
DATA IN
CLK
DIGITAL HOST
VIO
IRQ
VIO
47k
06
97
3-
0
2
0
Figure 30. CS Mode, 3-Wire with Busy Indicator Connection Diagram (SDI High)
SDO
D17
D16
D1
D0
tDIS
SCK
123
17
18
19
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
CNV
CONVERSION
ACQUISITION
tCONV
tCYC
ACQUISITION
SDI = 1
tCNVH
tACQ
06
97
3-
0
21
Figure 31. CS Mode, 3-Wire with Busy Indicator Serial Interface Timing (SDI High)
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相关代理商/技术参数 |
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| AD7984BRMZ | 功能描述:IC ADC 18BIT 1.3MSPS SAR 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| AD7984BRMZ-RL7 | 功能描述:IC ADC 18BIT 1.3MSPS SAR 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7985 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP |
| AD7985BCPZ | 功能描述:IC ADC 16B 2.5MSPS PULSR 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7985BCPZ-RL7 | 功能描述:IC ADC 16B 2.5MSPS PULSR 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
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