AD7699 Analog Devices, AD7699 Datasheet - Page 5

• Manufacturer Part Number: AD7699
• Description: 16-Bit, 8-Channel, 500 kSPS PulSAR ADC
• Manufacturer: Analog Devices

Specifications of AD7699

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip,SE-Uni
• Ain Range: (Vref) p-p,4 V p-p,Bip (Vref) x 0.5,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
TIMING SPECIFICATIONS
VDD = 4.5 V to 5.5 V, V
Table 3.
Parameter
Conversion Time: CNV Rising Edge to Data Available
Acquisition Time
Time Between Conversions
CNV Pulse Width
Data Write/Read During Conversion
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 Falling Edge
DIN Valid Hold Time from SCK Falling Edge
1
See
VIO Above 1.8 V
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
VIO Above 1.8 V
Figure 2
1
and
Figure 3
for load conditions.
REF
= 4.096 to VDD, VIO = 1.8 V to VDD, all specifications T
30% VIO
1
2
2V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.
0.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
t
DELAY
Figure 2. Load Circuit for Digital Interface Timing
TO SDO
Figure 3. Voltage Levels for Timing
2V OR VIO – 0.5V
0.8V OR 0.5V
50pF
C
Rev. A | Page 5 of 28
L
500µA
500µA
2
1
I
I
OL
OH
70% VIO
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CONV
ACQ
CYC
CNVH
DATA
SCK
SCKL
SCKH
HSDO
DSDO
EN
DIS
CLSCK
SDIN
HDIN
t
DELAY
2V OR VIO – 0.5V
0.8V OR 0.5V
1.4V
MIN
to T
2
MAX
Min
400
2
10
t
11
11
4
10
5
5
DSDO
1
, unless otherwise noted.
+ 2
Typ
Max
1.6
1.2
16
17
18
21
28
15
17
18
22
25
32
AD7699
Unit
μs
ns
μs
ns
μs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns