Control of the AD7993/AD7994 is carried out via the I2
參數(shù)資料
型號(hào)： AD7994BRU-0
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 16/32頁(yè)
文件大小： 0K
描述： IC ADC 12BIT 4CHAN I2C 16TSSOP
標(biāo)準(zhǔn)包裝： 96
位數(shù)： 12
采樣率（每秒）： 188k
數(shù)據(jù)接口： I²C，串行
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 2.2mW
電壓電源： 單電源
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 16-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 16-TSSOP
包裝： 管件
輸入數(shù)目和類型： 4 個(gè)單端，單極
AD7993/AD7994
Rev. 0 | Page 23 of 32
SERIAL INTERFACE
Control of the AD7993/AD7994 is carried out via the I2C-
compatible serial bus. The AD7993/AD7994 is connected to
this bus as a slave device under the control of a master device,
for example, the processor.
SERIAL BUS ADDRESS
Like all I2C-compatible devices, the AD7993/AD7994 have a
7-bit serial address. The 3 MSB of this address for the AD7993/
AD7994 are set to 010. The AD7993/AD7994 come in two
versions, the AD7993-0/AD7994-0 and AD7993-1AD7994-1.
The two versions have three different I2C addresses available,
which are selected by either tying the address select pin, AS, to
AGND or VDD, or by letting the pin float (see Table 6). By giving
different addresses for the two versions, up to five AD7993/
AD7994 devices can be connected to a single serial bus, or the
addresses can be set to avoid conflicts with other devices on the
bus. See Table 6.
The serial bus protocol operates as follows:
The master initiates 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 will follow. 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.
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 now remain idle while the
selected device waits for data to be read from or written to it. If
the R/W bit is a 0, the master writes to the slave device. If the
R/W bit is a 1, the master reads from the slave device.
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.
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 No
Acknowledge. The master then takes the data line low during
the low period before the 10th clock pulse, then high during the
10th clock pulse to assert a stop condition.
Any number of bytes of data may be transferred over the serial
bus in one operation, but it is not possible to mix read and write
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7994BRU-0REEL 功能描述:IC ADC 12BIT 4CHAN I2C 16TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極
AD7994BRU-1 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 12-bit Serial 16-Pin TSSOP 制造商:Rochester Electronics LLC 功能描述:
AD7994BRU-1REEL 制造商:Analog Devices 功能描述:ADC Single SAR 188ksps 12-bit Serial 16-Pin TSSOP T/R
AD7994BRUZ0 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:
AD7994BRUZ-0 功能描述:IC ADC 12BIT 4CHAN I2C 16TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6
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