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AD7949BCPZ Fiches technique(PDF) 6 Page - Analog Devices

No de pièce AD7949BCPZ
Description  14-Bit, 8-Channel, 250 kSPS PulSAR ADC
Download  28 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

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AD7949
Rev. A | Page 6 of 28
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 3. 1
Parameter
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
μs
CNV Pulse Width
tCNVH
10
ns
Data Write/Read During Conversion
tDATA
1.0
μs
SCK Period
tSCK
15
ns
SCK Low Time
tSCKL
7
ns
SCK High Time
tSCKH
7
ns
SCK Falling Edge to Data Remains Valid
tHSDO
4
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 4.5 V
16
ns
VIO Above 3 V
17
ns
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
19
ns
CNV Low to SDO D15 MSB Valid
tEN
VIO Above 4.5 V
15
ns
VIO Above 3 V
17
ns
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
22
ns
CNV High or Last SCK Falling Edge to SDO High Impedance
tDIS
25
ns
CNV Low to SCK Rising Edge
tCLSCK
10
ns
DIN Valid Setup Time from SCK Falling Edge
tSDIN
4
ns
DIN Valid Hold Time from SCK Falling Edge
tHDIN
4
ns
1 See Figure 2 and Figure 3 for load conditions.


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