AD7949 Analog Devices, AD7949 Datasheet - Page 5

• Manufacturer Part Number: AD7949
• Description: 14-Bit, 8-Channel, 250 kSPS PulSAR ADC
• Manufacturer: Analog Devices

Specifications of AD7949

• Resolution (bits): 14bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 1.8 V to VDD, all specifications T
Table 3.
Parameter
Conversion Time: CNV Rising Edge to Data Available
Acquisition Time
Time Between Conversions
Data Write/Read During Conversion
CNV Pulse Width
SCK Period
SCK Low Time
SCK High Time
SCK Falling Edge to Data Remains Valid
SCK Falling Edge to Data Valid Delay
CNV Low to SDO D15 MSB Valid
CNV High or Last SCK Falling Edge to SDO High Impedance
CNV Low to SCK Rising Edge
DIN Valid Setup Time from SCK Rising Edge
DIN Valid Hold Time from SCK Rising Edge
1
See
VIO Above 1.8 V
VIO Above 1.8 V
VIO Above 2.7 V
VIO Above 2.3 V
VIO Above 2.7 V
VIO Above 2.3 V
Figure 2
1
and
Figure 3
for load conditions.
Rev. C | Page 5 of 32
MIN
to T
MAX
, unless otherwise noted.
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CONV
ACQ
CYC
DATA
CNVH
SCK
SCKL
SCKH
HSDO
DSDO
EN
DIS
CLSCK
SDIN
HDIN
Min
1.8
4.0
10
t
11
11
4
10
5
5
DSDO
+ 2
Typ
Max
2.2
1.0
18
23
28
18
22
25
32
AD7949
Unit
μs
μs
μs
μs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns