Datasheet

AD7687 Data Sheet
Rev. B | Page 6 of 28
−40°C to +85°C, VDD = 2.3 V to 4.5 V, VIO = 2.3 V to 4.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise stated.
See Figure 3 and Figure 4 for load conditions.
Table 5.
Parameter Symbol Min Typ Max Unit
Conversion Time: CNV Rising Edge to Data Available t
CONV
0.7 3.2 μs
Acquisition Time t
ACQ
1.8 μs
Time Between Conversions t
CYC
5 μs
CNV Pulse Width ( CS Mode )
t
CNVH
10 ns
SCK Period ( CS Mode )
t
SCK
25 ns
SCK Period ( Chain Mode ) t
SCK
VIO Above 3 V 29 ns
VIO Above 2.7 V 35 ns
VIO Above 2.3 V 40 ns
SCK Low Time t
SCKL
12 ns
SCK High Time t
SCKH
12 ns
SCK Falling Edge to Data Remains Valid t
HSDO
5 ns
SCK Falling Edge to Data Valid Delay t
DSDO
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)
t
EN
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)
t
DIS
25 ns
SDI Valid Setup Time from CNV Rising Edge (CS Mode)
t
SSDICNV
30 ns
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
t
HSDICNV
0 ns
SCK Valid Setup Time from CNV Rising Edge (Chain Mode) t
SSCKCNV
5 ns
SCK Valid Hold Time from CNV Rising Edge (Chain Mode) t
HSCKCNV
8 ns
SDI Valid Setup Time from SCK Falling Edge (Chain Mode) t
SSDISCK
5 ns
SDI Valid Hold Time from SCK Falling Edge (Chain Mode) t
HSDISCK
4 ns
SDI High to SDO High (Chain Mode with BUSY indicator) t
DSDOSDI
36 ns