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参数资料
| 型号： | EVAL-AD7991EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD7991 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行 |
| 输入范围： | 0 ~ Vdd |
| 在以下条件下的电源（标准）： | 4.4mW @ 5.5V，3.4MHz |
| 工作温度： | -40°C ~ 125°C |
| 已用 IC / 零件： | AD7991 |
| 已供物品： | 板，缆线，CD |
| 产品目录页面： | 780 (CN2011-ZH PDF) |
| 相关产品： | AD7991YRJZ-1RL-ND - IC ADC 12BIT 4CH I2C SOT23-8 AD7991YRJZ-0RL-ND - IC ADC 12BIT 4CH I2C SOT23-8 AD7991YRJZ-1500RL7DKR-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 AD7991YRJZ-0500RL7DKR-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 AD7991YRJZ-1500RL7CT-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 AD7991YRJZ-0500RL7CT-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 AD7991YRJZ-1500RL7TR-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 AD7991YRJZ-0500RL7TR-ND - IC ADC 12BIT 4CH SAR I2C SOT23-8 |
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AD7991/AD7995/AD7999
Rev. B | Page 22 of 28
SERIAL INTERFACE
Control of the AD7991/AD7995/AD7999 is accomplished via
the I2C-compatible serial bus. The AD7991/AD7995/AD7999 is
connected to this bus as a slave device under the control of a
master device, such as the processor.
SERIAL BUS ADDRESS
Like all I2C-compatible devices, the AD7991/AD7995/AD7999 has
a 7-bit serial address. The devices are available in two versions, the
AD7991-0/AD7995-0 and the AD7991-1/AD7995-1/AD7999-1.
Each version has a different address (see Table 8), which allows up
to two AD7991/AD7995 devices to be connected to a single
serial bus. AD7999 has only one version.
The serial bus protocol operates as follows:
1.
The master initiates a data transfer by establishing a start
condition, defined as a high-to-low transition on the serial
data line SDA while the serial clock line, SCL, remains high.
This indicates that an address/data stream follows.
2.
All slave peripherals connected to the serial bus respond to
the start condition and shift in the next eight bits, consisting of
a 7-bit address (MSB first) plus an R/W bit that determines
the direction of the data transfer—that is, whether data is
written to or read from the slave device.
3.
The peripheral whose address corresponds to the transmitted
address responds by pulling the data line low during the
low period before the ninth clock pulse, known as the
acknowledge bit. All other devices on the bus remain idle
while the selected device waits for data to be read from or
written to it. If the R/W bit is set to 0, the master writes to
the slave device. If the R/W bit is set to 1, the master reads
from the slave device.
4.
Data is sent over the serial bus in sequences of nine clock
pulses—eight bits of data followed by an acknowledge bit
from the receiver of data. Transitions on the data line must
occur during the low period of the clock signal and remain
stable during the high period because a low-to-high transition
when the clock is high may be interpreted as a stop signal.
5.
When all data bytes have been read or written, stop conditions
are established. In write mode, the master pulls the data line
high during the 10th clock pulse to assert a stop condition.
In read mode, the master device pulls the data line high
during the low period before the ninth clock pulse. This is
known as a no acknowledge. The master takes the data line
low during the low period before the 10th clock pulse, and
then high during the 10th clock pulse to assert a stop condition.
6.
Any number of bytes of data can be transferred over the serial
bus in one operation, but it is not possible to mix reads and
writes in one operation because the type of operation is
determined at the beginning and cannot subsequently be
changed without starting a new operation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7991EBZ | 制造商:Analog Devices 功能描述:AD7991, ADC, I2C, EVALUATION BOARD |
| EVAL-AD7992CB | 制造商:AD 制造商全称:Analog Devices 功能描述:2-Channel, 12-Bit ADC with I2C-Compatible |
| EVAL-AD7992EBZ | 功能描述:BOARD EVALUATION FOR AD7992 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 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-AD7993CB | 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD. - Bulk |
| EVAL-AD7993CBZ | 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD. - Bulk |
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