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| 型號： | AD7739BRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 8-Channel, High Throughput, 24-Bit Sigma-Delta ADC |
| 中文描述： | 8-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | MS-153AD, TSSOP-24 |
| 文件頁數(shù)： | 27/32頁 |
| 文件大小： | 380K |
| 代理商： | AD7739BRU |
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AD7739
MULTIPLEXER, CONVERSION, AND DATA
OUTPUT TIMING
The specified conversion time includes one or two settling and
sampling periods and a scaling time.
Rev. 0 | Page 27 of 32
With chopping enabled (Figure 24), a conversion cycle starts
with a settling time of 43 MCLK cycles or 44 MCLK cycles
(~7 μs with a 6.144 MHz MCLK) to allow the circuits following
the multiplexer to settle. The sigma-delta modulator then
samples the analog signals and the digital filter processes the
digital data stream. The sampling time depends on FW, i.e., on
the channel conversion time register contents. After another
settling of 42 MCLK cycles (~6.8 μs), the sampling time is
repeated with a reversed (chopped) analog input signal. Then,
during the scaling time of 163 MCLK cycles (~26.5 μs), the two
results from the digital filter are averaged, scaled using the
calibration registers, and written into the channel data register.
With chopping disabled (Figure 25), only one sampling time is
preceded by a settling time of 43 MCLK or 44 MCLK cycles and
followed by a scaling time of 163 MCLK cycles.
The RDY pin goes high during the scaling time, regardless of its
previous state. The relevant RDY bit is set in the ADC status
register and in the channel status register, and the RDY pin goes
low when the channel data register is updated and the channel
conversion cycle is finished. If in continuous conversion mode,
the part will automatically continue with a conversion cycle on
the next enabled channel.
Note that every channel can be configured independently for
conversion time and chopping mode. The overall cycle and
effective per channel data rates depend on all enabled
channel settings.
– CHANNEL 1
SCALING
TIME
SAMPLING
TIME
+ CHANNEL 1
SAMPLING
TIME
SETTLING
TIME
MULTIPLEXER
– CHANNEL 0
RDY
SETTLING
TIME
CONVERSION TIME
03742-0-024
Figure 24. Multiplexer and Conversion Timing—Continuous Conversion on Several Channels with Chopping Enabled
SCALING
TIME
CHANNEL 1
SAMPLING
TIME
MULTIPLEXER
CHANNEL 0
RDY
SETTLING
TIME
CONVERSION TIME
03742-0-025
Figure 25. Multiplexer and Conversion Timing—Continuous Conversion on Several Channels with Chopping Disabled
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| AD7739BRU-REEL | 功能描述:IC ADC 24BIT 8CH SIG-DEL 24TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7739BRU-REEL7 | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 3.05Msps 24-bit Serial 24-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 15.133KSPS 24BIT SERL 24TSSOP - Tape and Reel |
| AD7739BRUZ | 功能描述:IC ADC 24BIT 8-CH 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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 |
| AD7739BRUZ | 制造商:Analog Devices 功能描述:IC, ADC, 24BIT, 15.1KSPS, TSSOP-24 |
| AD7739BRUZ-REEL7 | 功能描述:IC ADC 24BIT 8CH SIG-DEL 24TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
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