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參數(shù)資料
型號(hào)： AD7994BRU-1
廠(chǎng)商： ANALOG DEVICES INC
元件分類(lèi)： ADC
英文描述： 4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP
中文描述： 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝： MO-153-AB, TSSOP-16
文件頁(yè)數(shù)： 26/27頁(yè)
文件大小： 277K
代理商： AD7994BRU-1
AD7994/AD7993
–26–
REV. PrF
PRELIMINARY TECHNICAL DATA
Figure 17. Mode 2 Operation
Figure 18. Mode 2 Sequence Operation
Mode 3 - Automatic Cycle Mode
An automatic conversion cycle can be selected and enabled
by writing a value to the Cycle Timer Register. A conver-
sion cycle interval can be set up on the AD7994/AD7993
by programming the relevant bits in the 3-bit Cycle Timer
Register as decoded in Table XIIb. When the Cycle
Timer register is programmed with any configuration
other than all 0’s, a conversion will take place every X ms,
depending on the configuration of these bits in the Cycle
Timer Register. There are 7 different cycle time intervals
to choose from as shown in Table XIIb. Once the conver-
sion has taken place the part powers down again until the
next conversion occurs. To exit this mode of operation the
user must program the Cycle Timer Register to contain
all 0’s. For cycle interval options see Table XIIb Cycle
Timer Intervals. To select a channel(s) for operation in
the cycle mode set the corresponding channel bit(s), D7 to
D4, of the Configuration Register. If more than one chan-
nel bit is set in the Configuration register the ADC will
automatically cycle through the Channel sequence, start-
ing with the lowest channel and working its way up
through the sequence. Once the sequence is complete the
ADC will start converting on the lowest channel again,
continuing to loop through the sequence until the Cycle
timer register contents are set to all 0’s. This mode is
useful for monitoring signals, e.g. battery voltage, tem-
perature etc, interrupting only when the limits are vio-
lated.
9
1
1
A
SCL
9
S
7-BIT ADDRESS
W
A COMMAND/ADDRESS POINT BYTE
A
SDA
Sr
7-BIT ADDRESS
R
A
FIRST DATA BYTE (MSBs)
A
SECOND DATA BYTE (LSBs)
SDA
1
1
9
SCL
9
9
Sr/
P
8
ACK BY
AD7994/3
ACK BY
AD7994/3
ACK BY
AD7994/3R
ACK BY
MASTER
NACK BY
MASTER
9
1
1
A
SCL
9
S
7-BIT ADDRESS
W
A
COMMAND/ADDRESS POINT BYTE
A
SDA
FIRST DATA BYTE (MSBs)
A
SECOND DATA BYTE (LSBs)
A
Sr
7-BIT ADDRESS
R
A
SDA
9
9
1
1
SCL
9
8
ACK BY
AD7994/3
ACK BY
AD7994/3
ACK BY
AD7994/3
ACK BY
MASTER
FIRST DATA BYTE (MSBs)
A
SECOND DATA BYTE (LSBs)
ACK BY
MASTER
ACK BY
MASTER
9
9
RESULT FROM CH1
RESULT FROM CH2
A/
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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(lèi)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(lèi)型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤(pán)（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類(lèi)型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱(chēng):296-25851-6
AD7994BRUZ-0REEL 功能描述:IC ADC 12BIT 4CHAN I2C 16TSSOP RoHS:是 類(lèi)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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類(lèi)型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
AD7994BRUZ-1 功能描述:IC ADC 12BIT 4CHAN I2C 16TSSOP RoHS:是 類(lèi)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(lèi)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(lèi)型:2 個(gè)單端，單極
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