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參數(shù)資料
| 型號： | AD7994BRU-0 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 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 個單端，單極 |
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AD7993/AD7994
Rev. 0 | Page 24 of 32
WRITING TO THE AD7993/AD7994
Depending on the register being written to, there are three
different writes for the AD7993/AD7994.
WRITING TO THE ADDRESS POINTER REGISTER
FOR A SUBSEQUENT READ
In order to read from a particular register, the address pointer
register must first contain the address of that register. If it does
not, the correct address must be written to the address pointer
register by performing a single-byte write operation, as shown
in Figure 26. The write operation consists of the serial bus
address followed by the address pointer byte. No data is
written to any of the data registers. A read operation may be
subsequently performed to read the register of interest.
WRITING A SINGLE BYTE OF DATA TO THE ALERT
STATUS REGISTER OR CYCLE REGISTER
The alert status register, configuration register and the cycle
register are 8-bit registers, so only one byte of data can be
written to each. Writing a single byte of data to one of these
registers consists of the serial bus write address, the chosen
data register address written to the address pointer register,
followed by the data byte written to the selected data register.
See Figure 27.
WRITING TWO BYTES OF DATA TO A LIMIT OR
HYSTERESIS REGISTER
Each of the four limit registers are 16-bit registers, so two bytes
of data are required to write a value to any one of them. Writing
two bytes of data to one of these registers consists of the serial
bus write address, the chosen limit register address written to
the address pointer register, followed by two data bytes written
to the selected data register. See Figure 28.
If the master is write addressing the AD7993/AD7994, it can
write to more than one register. After the first write operation
has completed for the first data register in the next byte, the
master writes to the address pointer byte to select the next data
register for a write operation. This eliminates the need to
readdress the device in order to write to another data register.
SDA
START BY
MASTER
ACK. BY
AD7993/AD7994
ACK. BY
AD7993/AD7994
STOP BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
19
1
9
C4
C3
C2
P2
P1
P0
A0
A1
A2
A3
0
SCL
1
C1
P3
03472-0-026
R/W
Figure 26. Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation
SDA
ACK. BY
AD7993/AD7994
11
9
C4
C3
C2
P2
P1
P0
R/W
A0
A1
A2
A3
0
SCL
1
C1
P3
91
9
D7
D6
D5
D2
D1
D0
D4
D3
FRAME 3
DATA BYTE
SCL (CONTINUED)
SDA (CONTINUED)
03472-0-027
START BY
MASTER
ACK. BY
AD7993/AD7994
ACK. BY
AD7993/AD7994
STOP BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
Figure 27. Single-Byte Write Sequence
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| 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 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
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