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参数资料
| 型号： | AD7942BCPZRL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 250KSPS 10-LFCSP |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| 位数： | 14 |
| 采样率（每秒）： | 250k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1.25mW |
| 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 个伪差分，单极 |
| 配用： | EVAL-AD7942CB-ND - BOARD EVALUATION FOR AD7942 |
| 其它名称： | AD7942BCPZRL7DKR |
AD7942
Rev. B | Page 17 of
24
CS Mode 3-Wire Without Busy Indicator
This mode is most often used when a single AD7942 is
connected to an SPI-compatible digital host. The connection
diagram is shown in Figure 30 and the corresponding timing
diagram is shown in Figure 31.
With SDI tied to VIO, a rising edge on CNV initiates a conver-
sion, selects the CS mode, and forces SDO to high impedance.
When a conversion is initiated, it continues to completion irres-
pective of the state of CNV. For instance, it is useful to bring
CNV low to select other SPI devices, such as analog
multiplexers. However, CNV must be returned high before the
minimum conversion time and held high until the maximum
conversion time to avoid generating the busy signal indicator.
When the conversion is complete the AD7942 enters the acqui-
sition phase and powers down. When CNV goes low, the MSB
is output onto SDO. The remaining data bits are then 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 also using the SCK falling edge allows a faster
reading rate provided it has an acceptable hold time. After the
14th SCK falling edge or when CNV goes high, whichever is
earlier, SDO returns to high impedance.
CNV
SCK
SDO
SDI
DATA IN
CLK
CONVERT
VIO
DIGITAL HOST
AD7942
04
65
7
-03
0
Figure 30. CS Mode 3-Wire Without Busy Indicator
Connection Diagram (SDI High)
SDO
D13
D12
D11
D1
D0
tDIS
SCK
12
3
12
13
14
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
CNV
CONVERSION
ACQUISITION
tCONV
tCYC
ACQUISITION
SDI = 1
tCNVH
tACQ
tEN
04
65
7-
0
31
Figure 31. CS Mode 3-Wire Without Busy Indicator, Serial Interface Timing (SDI High)
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相关代理商/技术参数 |
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|---|---|
| AD7942BCPZRL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN |
| AD7942BRM | 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 14-bit Serial 10-Pin MSOP Tube 制造商:Analog Devices 功能描述:IC 14-BIT ADC |
| AD7942BRMRL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 250 kSPS PulSAR ADC in MSOP/QFN |
| AD7942BRM-RL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 14-bit Serial 10-Pin MSOP T/R |
| AD7942BRMZ | 功能描述:IC ADC 14BIT 250KSPS 10-MSOP 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 |
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