参数资料
| 型号： | AD7294BCPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 29/49页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT I2C/SRL 1M 56LFCSP |
| 标准包装： | 2,500 |
| 类型： | ADC，DAC |
| 分辨率（位）： | 12 b |
| 采样率（每秒）： | 22.22k |
| 数据接口： | I²C，串行 |
| 电压电源： | 模拟和数字 |
| 电源电压： | 4.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 56-LFCSP-VQ（8x8） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页
AD7294
Data Sheet
Rev. H | Page 34 of 48
I2C INTERFACE
GENERAL I2C TIMING
Figure 50 shows the timing diagram for general read and write
operations using an I2C-compliant interface.
The I2C bus uses open-drain drivers; therefore, when no device
is driving the bus, both SCL and SDA are high. This is known as
idle state. When the bus is idle, 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 a data stream follows. The
master device is responsible for generating the clock.
Data is sent over the serial bus in groups of nine bits—eight bits
of data from the transmitter followed by an acknowledge bit (ACK)
from the receiver. Data transitions on the SDA line must occur
during the low period of the clock signal and remain stable
during the high period. The receiver should pull the SDA line
low during the acknowledge bit to signal that the preceding byte
has been received correctly. If this is not the case, cancel the
transaction.
The first byte that the master sends must consist of a 7-bit slave
address, followed by a data direction bit. Each device on the bus
has a unique slave address; therefore, the first byte sets up
communication with a single slave device for the duration of the
transaction.
The transaction can be used either to write to a slave device
(data direction bit = 0) or to read data from it (data direction
bit = 1). In the case of a read transaction, it is often necessary
first to write to the slave device (in a separate write transaction)
to tell it from which register to read. Reading and writing
cannot be combined in one transaction.
When the transaction is complete, the master can keep control
of the bus, initiating a new transaction by generating another
start bit (high-to-low transition on SDA while SCL is high). This
is known as a repeated start (Sr). Alternatively, the bus can be
relinquished by releasing the SCL line followed by the SDA line.
This low-to-high transition on SDA while SCL is high is known
as a stop bit (P), and it leaves the I2C bus in its idle state (no
current is consumed by the bus).
The example in Figure 50 shows a simple write transaction
with an AD7294 as the slave device. In this example, the
AD7294 register pointer is being set up ready for a future read
transaction.
P7
P6
P5
P4
P3
P2
P1
P0
START COND
BY MASTER
ACK. BY
AD7294
SLAVE ADDRESS BYTE
ACK. BY
AD7294
SCL
SDA
REGISTER ADDRESS
STOP BY
MASTER
USER PROGRAMMABLE 5 LSBs
R/W
A6
A5
A4
A3
A2
A1
A0
05747-
040
Figure 50. General I2C Timing
相关PDF资料 |
PDF描述 |
|---|---|
| AD7306AN | IC TXRX RS-232 RS-422 24-DIP |
| AD7339BSZ-REEL | IC ADC/QUAD DAC 5V W/REF 52-MQFP |
| AD7376ARUZ100 | IC POT DIGITAL 128POS 14-TSSOP |
| AD7391SRZ | IC DAC 10BIT SERIAL 3V 8SOIC |
| AD7392AR | IC DAC 12BIT PARALLEL 3V 20-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7294BSUZ | 功能描述:模数转换器 - ADC 12B Monitor & Cntrl System w/ Temp Sensr RoHS:否 制造商:Analog Devices 通道数量: 结构: 转换速率: 分辨率: 输入类型: 信噪比: 接口类型: 工作电源电压: 最大工作温度: 安装风格: 封装 / 箱体: |
| AD7294BSUZRL | 制造商:Analog Devices 功能描述:Temp Sensor Digital Serial (2-Wire, I2C) 64-Pin TQFP 制造商:Analog Devices 功能描述:TEMP SENSOR DGTL SERL (2-WIRE, I2C) 64TQFP - Tape and Reel 制造商:Analog Devices 功能描述:IC ADC 12BIT W/DAC/TEMP 64TQFP 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC 12-Bit Multi-Channel ADC DAC wt Temp IC 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| AD7298 | 制造商:AD 制造商全称:Analog Devices 功能描述:8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor |
| AD7298-1BCPZ | 功能描述:IC ADC 10BIT SPI/SRL 8CH 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 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 |
| AD7298-1BCPZ-RL | 功能描述:IC ADC 10BIT SPI/SRL 8CH 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 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:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
发布紧急采购，3分钟左右您将得到回复。