AD7915 Datasheet, PDF (5/26 Pages) Analog Devices – 16-Bit, 1 MSPS/500 kSPS Differential PulSAR ADCs

Data Sheet
AD7915/AD7916
TIMING SPECIFICATIONS
TA = −40°C to +125°C, VDD = 2.37 V to 2.63 V, VIO = 2.3 V to 5.5 V, CLOAD_SDO = 20 pF, unless otherwise noted. See Figure 2 for voltage levels.
Table 3.
Parameter
AD7915
Throughput Rate
Conversion Time: CNV Rising Edge to Data Available
Acquisition Time
Time Between Conversions
AD7916
Throughput Rate
Conversion Time: CNV Rising Edge to Data Available
Acquisition Time
Time Between Conversions
CNV Pulse Width (CS Mode)
SCK Period (CS Mode)
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
SCK Period (Chain Mode)
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
SCK Low Time
SCK High Time
SCK Falling Edge to Data Remains Valid
SCK Falling Edge to Data Valid Delay
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
CNV or SDI Low to SDO D15 MSB Valid (CS Mode)
VIO Above 3 V
VIO Above 2.3 V
CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS Mode)
SDI Valid Setup Time from CNV Rising Edge (CS Mode)
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
SCK Valid Setup Time from CNV Rising Edge (Chain Mode)
SCK Valid Hold Time from CNV Rising Edge (Chain Mode)
SDI Valid Setup Time from SCK Falling Edge (Chain Mode)
SDI Valid Hold Time from SCK Falling Edge (Chain Mode)
SDI High to SDO High (Chain Mode with Busy Indicator)
Symbol
tCONV
tACQ
tCYC
tCONV
tACQ
tCYC
tCNVH
tSCK
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
tEN
tDIS
tSSDICNV
tHSDICNV
tSSCKCNV
tHSCKCNV
tSSDISCK
tHSDISCK
tDSDOSDI
Min Typ Max Unit
1
MSPS
500
710 ns
290
ns
1
μs
500 kSPS
0.5
1.6
μs
400
ns
2
μs
10
ns
10.5
ns
12
ns
13
ns
15
ns
11.5
ns
13
ns
14
ns
16
ns
4.5
ns
4.5
ns
3
ns
9.5
ns
11
ns
12
ns
14
ns
10
ns
15
ns
20
ns
5
ns
2
ns
5
ns
5
ns
2
ns
3
ns
15
ns
X% VIO¹
t_DELAY
V_IH2
V_IL2
Y% VIO¹
t_DELAY
V_IH2
V_IL2
1_{FOR VIO ≤ 3.0V, X = 90 AND Y = 10; FOR VIO > 3.0V, X = 70 AND Y = 30.}
2_{MINIMUM VIH AND MAXIMUM VIL USED. SEE THE DIGITAL INPUTS}
SPECIFICATIONS IN TABLE 3.
Figure 2. Voltage Levels for Timing
Rev. 0 | Page 5 of 26