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AD7685 Fiches technique(PDF) 6 Page - Analog Devices

No de pièce AD7685
Description  16-Bit, 250 kSPS PulSAR
Download  28 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD7685 Fiches technique(HTML) 6 Page - Analog Devices

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AD7685
Data Sheet
−40°C to +85°C, VIO = 2.3 V to 4.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise stated.
Table 5. VDD = 2.3V to 4.5 V1
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
0.7
3.2
µs
Acquisition Time
tACQ
1.8
µs
Time Between Conversions
tCYC
5
µs
CNV Pulse Width (CS Mode)
tCNVH
10
ns
SCK Period (CS Mode)
tSCK
25
ns
SCK Period (Chain Mode)
tSCK
VIO Above 3 V
29
ns
VIO Above 2.7 V
35
ns
VIO Above 2.3 V
40
ns
SCK Low Time
tSCKL
12
ns
SCK High Time
tSCKH
12
ns
SCK Falling Edge to Data Remains Valid
tHSDO
5
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 3 V
24
ns
VIO Above 2.7 V
30
ns
VIO Above 2.3 V
35
ns
CNV or SDI Low to SDO D15 MSB Valid (CS Mode)
tEN
VIO Above 2.7 V
18
ns
VIO Above 2.3 V
22
ns
CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS Mode)
tDIS
25
ns
SDI Valid Setup Time from CNV Rising Edge (CS Mode)
tSSDICNV
30
ns
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
tHSDICNV
0
ns
SCK Valid Setup Time from CNV Rising Edge (Chain Mode)
tSSCKCNV
5
ns
SCK Valid Hold Time from CNV Rising Edge (Chain Mode)
tHSCKCNV
8
ns
SDI Valid Setup Time from SCK Falling Edge (Chain Mode)
tSSDISCK
5
ns
SDI Valid Hold Time from SCK Falling Edge (Chain Mode)
tHSDISCK
4
ns
SDI High to SDO High (Chain Mode with Busy Indicator)
tDSDOSDI
36
ns
1
See Figure 3 and Figure 4 for load conditions.
500µA
IOL
500µA
IOH
1.4V
TO SDO
CL
50pF
Figure 3. Load Circuit for Digital Interface Timing
30% VIO
70% VIO
2V OR VIO – 0.5V1
0.8V OR 0.5V2
0.8V OR 0.5V2
2V OR VIO – 0.5V1
tDELAY
tDELAY
NOTES
1. 2V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.
2. 0.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
Figure 4. Voltage Levels for Timing
Rev. D | Page 6 of 28


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