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AD7949 数据表(PDF) 5 Page - Analog Devices

部件名 AD7949
功能描述  14-Bit, 8-Channel, 250 kSPS PulSAR ADC
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7949 数据表(HTML) 5 Page - Analog Devices

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AD7949
Rev. B | Page 5 of 32
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 1.8 V to VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter1
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
2.2
μs
Acquisition Time
tACQ
1.8
μs
Time Between Conversions
tCYC
4.0
μs
Data Write/Read During Conversion
tDATA
1.0
μs
CNV Pulse Width
tCNVH
10
ns
SCK Period
tSCK
tDSDO + 2
ns
SCK Low Time
tSCKL
11
ns
SCK High Time
tSCKH
11
ns
SCK Falling Edge to Data Remains Valid
tHSDO
4
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
23
ns
VIO Above 1.8 V
28
ns
CNV Low to SDO D15 MSB Valid
tEN
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
22
ns
VIO Above 1.8 V
25
ns
CNV High or Last SCK Falling Edge to SDO High Impedance
tDIS
32
ns
CNV Low to SCK Rising Edge
tCLSCK
10
ns
DIN Valid Setup Time from SCK Rising Edge
tSDIN
5
ns
DIN Valid Hold Time from SCK Rising Edge
tHDIN
5
ns
1 See Figure 2 and Figure 3 for load conditions.


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