參數(shù)資料
型號(hào)： AD7745ARUZ-REEL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 5/28頁(yè)
文件大小： 0K
描述： IC CONV 1CH CAP TO DGTL 16TSSOP
設(shè)計(jì)資源： Extending the Capacitive Input Range of AD7745/AD7746 (CN0129)
標(biāo)準(zhǔn)包裝： 2,500
類(lèi)型： 電容數(shù)字轉(zhuǎn)換器
分辨率（位）： 24 b
數(shù)據(jù)接口： 串行
電壓電源： 單電源
電源電壓： 2.7 V ~ 5.25 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)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： 帶卷 (TR)
AD7745/AD7746
Rev. 0| Page 13 of 28
If a repeated start condition is encountered after the address
pointer byte, all peripherals connected to the bus respond
exactly as outlined above for a start condition, that is, a repeated
start condition is treated the same as a start condition. When a
master device issues a stop condition, it relinquishes control of
the bus, allowing another master device to take control of the
bus. Hence, a master wanting to retain control of the bus issues
successive start conditions known as repeated start conditions.
AD7745/AD7746 RESET
To reset the AD7745/AD7746 without having to reset the entire
I2C bus, an explicit reset command is provided. This uses a
particular address pointer word as a command word to reset the
part and upload all default settings. The AD7745/AD7746 do
not respond to the I2C bus commands (do not acknowledge)
during the default values upload for approximately 150 s
(max 200 s).
The reset command address word is 0xBF.
GENERAL CALL
When a master issues a slave address consisting of seven 0s with
the eighth bit (R/W bit) set to 0, this is known as the general call
address. The general call address is for addressing every device
connected to the I2C bus. The AD7745/AD7746 acknowledge
this address and read in the following data byte.
If the second byte is 0x06, the AD7745/AD7746 are reset,
completely uploading all default values. The AD7745/AD7746
do not respond to the I2C bus commands (do not acknowledge)
during the default values upload for approximately 150 s (max
200 s).
The AD7745/AD7746 do not acknowledge any other general
call commands.
1–7
8
9
1–7
8
9
1–7
8
9
P
S
START ADDR R/W ACK SUBADDRESS ACK
DATA
ACK
STOP
SDATA
SCLOCK
05468-006
Figure 24. Bus Data Transfer
DATA
A(S)
S
SLAVE ADDR A(S)
SUB ADDR
A(S)
LSB = 0
LSB = 1
DATA
P
S
SLAVE ADDR A(S)
SUB ADDR
A(S) S
SLAVE ADDR
A(S)
DATA
A(M)
DATA
P
WRITE
SEQUENCE
READ
SEQUENCE
A(S) = NO-ACKNOWLEDGE BY SLAVE
A(M) = NO-ACKNOWLEDGE BY MASTER
A(S) = ACKNOWLEDGE BY SLAVE
A(M) = ACKNOWLEDGE BY MASTER
S = START BIT
P = STOP BIT
A(S)
A(M)
05468-007
Figure 25. Write and Read Sequences
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AD7746 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:24-Bit Capacitance-to-Digital Converter with Temperature Sensor
AD7746ARUZ 功能描述:IC CONV 2CH CAP TO DGTL 16-TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類(lèi)型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
AD7746ARUZ-REEL 功能描述:IC CONV 2CH CAP TO DGTL 16-TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類(lèi)型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
AD7746ARUZ-REEL7 功能描述:IC CONV 2CH CAP TO DGTL 16-TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類(lèi)型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
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