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EVAL-AD7689CBZ Datasheet(PDF) 7 Page - Analog Devices

Part # EVAL-AD7689CBZ
Description  16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

EVAL-AD7689CBZ Datasheet(HTML) 7 Page - Analog Devices

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AD7682/AD7689
Rev. 0 | Page 7 of 28
VDD = 2.5 V to 4.5 V, VIO = 2.3 V to VDD, all specifications TMIN to TMAX, unless otherwise noted.
Table 4. 1
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
VDD = 2.7 V to 4.5 V
tCONV
3.2
μs
VDD = 2.3 V to 2.7 V
tCONV
3.4
μs
Acquisition Time
tACQ
1.8
μs
Time Between Conversions
μs
VDD = 2.7 V to 4.5 V
tCYC
5
μs
VDD = 2.3 V to 2.7 V
tCYC
5.2
μs
CNV Pulse Width
tCNVH
10
ns
Data Write/Read During Conversion
tDATA
1.4
μs
SCK Period
tSCK
25
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
37
ns
CNV Low to SDO D15 MSB Valid
tEN
VIO Above 3 V
21
ns
VIO Above 2.7 V
27
ns
VIO Above 2.3 V
35
ns
CNV High or Last SCK Falling Edge to SDO High Impedance
tDIS
50
ns
CNV Low to SCK Rising Edge
tCLSCK
10
ns
SDI Valid Setup Time from SCK Falling Edge
tSDIN
5
ns
SDI Valid Hold Time from SCK Falling Edge
tHDIN
5
ns
1 See Figure 2 and Figure 3 for load conditions.
IOL
500µA
500µA
IOH
1.4V
TOSDO
CL
50pF
Figure 2. 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
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 3. Voltage Levels for Timing


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