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AD7981 датащи(PDF) 5 Page - Analog Devices

номер детали AD7981
подробное описание детали  High Temperature, 16-Bit, 600 kSPS PulSAR ADC
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7981 датащи(HTML) 5 Page - Analog Devices

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Data Sheet
AD7981
Rev. B | Page 5 of 26
TIMING SPECIFICATIONS
VDD = 2.375 V to 2.625 V, VIO = 3.3 V to 5.5 V, TMIN to TMAX, unless otherwise stated. See Figure 2 and Figure 3 for load conditions.
Table 3.
Parameter
Symbol
Min
Typ
Max
Unit
CONVERSION AND ACQUISITION TIMES
Conversion Time: CNV Rising Edge to Data Available
tCONV
800
1200
ns
Acquisition Time
tACQ
290
ns
Time Between Conversions
tCYC
1667
ns
CNV PULSE WIDTH (CS MODE)
tCNVH
10
ns
SCK
SCK Period (CS Mode)
tSCK
VIO Above 4.5 V
10.5
ns
VIO Above 3 V
12
ns
VIO Above 2.7 V
13
ns
VIO Above 2.3 V
15
ns
SCK Period (Chain Mode)
tSCK
VIO Above 4.5 V
11.5
ns
VIO Above 3 V
13
ns
VIO Above 2.7 V
14
ns
VIO Above 2.3 V
16
ns
SCK Low Time
tSCKL
4.5
ns
SCK High Time
tSCKH
4.5
ns
SCK Falling Edge to Data Remains Valid
tHSDO
3
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO Above 4.5 V
9.5
ns
VIO Above 3 V
11
ns
VIO Above 2.7 V
12
ns
VIO Above 2.3 V
14
ns
CS MODE
CNV or SDI Low to SDO D15 MSB Valid
tEN
VIO Above 3 V
10
ns
VIO Above 2.3 V
15
ns
CNV or SDI High or Last SCK Falling Edge to SDO High Impedance
tDIS
20
ns
SDI Valid Setup Time from CNV Rising Edge
tSSDICNV
5
ns
SDI Valid Hold Time from CNV Rising Edge
tHSDICNV
2
ns
CHAIN MODE
SDI Valid Hold Time from CNV Rising Edge
tHSDICNV
0
ns
SCK Valid Setup Time from CNV Rising Edge
tSSCKCNV
5
ns
SCK Valid Hold Time from CNV Rising Edge
tHSCKCNV
5
ns
SDI Valid Setup Time from SCK Falling Edge
tSSDISCK
2
ns
SDI Valid Hold Time from SCK Falling Edge
tHSDISCK
3
ns
SDI High to SDO High (Chain Mode with Busy Indicator)
tDSDOSDI
15
ns
Figure 2. Load Circuit for Digital Interface Timing
Figure 3. Voltage Levels for Timing
500µA
IOL
500µA
IOH
1.4V
TO SDO
CL
20pF
X% VIO1
Y% VIO1
VIH2
VIL2
VIL2
VIH2
tDELAY
tDELAY
1
FOR VIO ≤ 3.0V, X = 90 AND Y = 10; FOR VIO > 3.0V, X = 70 AND Y = 30.
2MINIMUM VIH AND MAXIMUM VIL USED. SEE DIGITAL INPUTS
SPECIFICATIONS IN TABLE 2.


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