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参数资料
| 型号： | EVAL-AD7691SDZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7691 |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 250k |
| 数据接口： | 串行 |
| 输入范围： | ±VREF |
| 在以下条件下的电源（标准）： | 10.6mW @ 250kSPS，5 V |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7691 |
| 已供物品： | 板 |
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AD7691
Data Sheet
Rev. C | Page 18 of 28
CS MODE, 3-WIRE WITHOUT BUSY INDICATOR
This mode is usually used when a single AD7691 is connected
to an SPI-compatible digital host. The connection diagram is
shown in Figure 35, 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. Once a conversion is initiated, it continues until
completion irrespective of the state of CNV. This can be useful,
for instance, to bring CNV low to select other SPI devices, such
as analog multiplexers, but 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 AD7691 enters the acquisition phase and powers down.
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 can allow 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.
CNV
SCK
SDO
SDI
DATA IN
CLK
CONVERT
VIO
DIGITAL HOST
AD7691
06
14
6-
0
11
Figure 35. 3-Wire CS Mode Without Busy Indicator
Connection Diagram (SDI High)
SDO
D17
D16
D15
D1
D0
tDIS
SCK
123
16
17
18
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
CNV
CONVERSION
ACQUISITION
tCONV
tCYC
ACQUISITION
SDI = 1
tCNVH
tACQ
tEN
06
14
6-
0
12
Figure 36. 3-Wire CS Mode 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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| EVAL-AD7693CB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 16BIT, 0.5 LSB, 500 KSPS PULSARDIFFERENTIAL ADC - Bulk |
| EVAL-AD7693CBZ | 功能描述:BOARD EVALUATION FOR AD7693 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:PulSAR® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7693SDZ | 功能描述:数据转换 IC 开发工具 EVAL BOARD 16-bit ADC 500kSPS RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| EVAL-AD7694CB | 制造商:Analog Devices 功能描述: |
| EVAL-AD7694CB1 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 250 kSPS PulSAR ADC in MSOP |
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