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參數(shù)資料
| 型號： | AD7946BCPRL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
| 中文描述： | 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10 |
| 封裝： | 3 X 3 MM, QFN-10 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大小： | 301K |
| 代理商： | AD7946BCPRL7 |
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Preliminary Technical Data
AD7946
Rev Pr D | Page 19 of 27
CS Mode 3-Wire with BUSY Indicator
This mode is usually used when a single AD7946 is connected
to an SPI compatible digital host having an interrupt input.
The connection diagram is shown in Figure 31 and the
corresponding timing is given in Figure 32.
With SDI tied to VIO, a rising edge on CNV initiates a
conversion, selects the CS mode, and forces SDO to high
impedance. SDO is maintained in high impedance until the
completion of the conversion irrespective of the state of CNV.
Prior to the minimum conversion time, CNV could be used to
select other SPI devices, such as analog multiplexers, but CNV
must be returned low before the minimum conversion time and
held low until the maximum conversion time to guarantee the
generation of the BUSY signal indicator. When the conversion
is complete, SDO goes from high impedance to low. With a
pull-up on the SDO line, this transition can be used as an
interrupt signal to initiate the data reading controlled by the
digital host. The AD7946 then enters the acquisition phase and
powers down. The data bits are then clocked out, MSB first, by
subsequent SCK falling edges. The data is valid on both SCK
edges. Although the rising edge can be used to capture the data,
a digital host also using the SCK falling edge will allow a faster
reading rate provided it has an acceptable hold time. After the
optional 15th SCK falling edge, or when CNV goes high,
whichever is earlier, SDO returns to high impedance.
CNV
SCK
SDO
SDI
DATA IN
IRQ
CLK
CONVERT
VIO
DIGITAL HOST
AD7946
47k
Figure 31. CS Mode 3-Wire with BUSY Indicator
Connection Diagram (SDI High)
04656-P
rC-010
SDO
D13
D12
D1
D0
tDIS
SCK
1
2
3
13
14
15
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
CNV
CONVERSION
ACQUISITION
tCONV
tCYC
tCNVH
tACQ
ACQUISITION
SDI = 1
Figure 32. CS Mode 3-Wire with BUSY Indicator Serial Interface Timing (SDI High)
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD7946BCPWP | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
| AD7946BCPZRL | 功能描述:IC ADC 14BIT 500KSPS 10-LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)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 |
| AD7946BCPZRL7 | 功能描述:IC ADC 14BIT 500KSPS 10-LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)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 |
| AD7946BRM | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| AD7946BRMRL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
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