參數(shù)資料
型號: AD7942BRMRL7
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: 14-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
中文描述: 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10
封裝: MO-187BA, MSOP-10
文件頁數(shù): 24/28頁
文件大小: 633K
代理商: AD7942BRMRL7
Preliminary Technical Data
AD7942
Rev Pr B | Page 5 of 28
TIMING SPECIFICATIONS
40°C to +85°C, VIO = 2.3 V to 5.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise stated.
Table 4. VDD = 4.5 V to 5.5 V1
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
0.5
2.2
s
Acquisition Time
tACQ
1.8
s
Time between Conversions
tCYC
4
s
CNV Pulse Width ( CS Mode )
tCNVH
10
ns
SCK Period ( CS Mode )
tSCK
15
ns
SCK Period ( Chain Mode )
tSCK
VIO above 4.5 V
19
ns
VIO above 3 V
20
ns
VIO above 2.7 V
21
ns
VIO above 2.3 V
22
ns
SCK Low Time
tSCKL
7
ns
SCK High Time
tSCKH
7
ns
SCK Falling Edge to Data Remains Valid
tHSDO
5
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO above 4.5 V
14
ns
VIO above 3 V
15
ns
VIO above 2.7 V
16
ns
VIO above 2.3 V
17
ns
CNV or SDI Low to SDO D15 MSB Valid (CS Mode)
tEN
VIO above 4.5 V
15
ns
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)
tDIS
25
ns
SDI Valid Setup Time from CNV Rising Edge (CS Mode)
tSSDICNV
15
ns
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
tHSDICNV
0
ns
SCK Valid Setup Time from CNV Rising Edge (Chain Mode)
tSSCKCNV
5
ns
SCK Valid Hold Time from CNV Rising Edge (Chain Mode)
tHSCKCNV
5
ns
SDI Valid Setup Time from SCK Falling Edge (Chain Mode)
tSSDISCK
5
ns
SDI Valid Hold Time from SCK Falling Edge (Chain Mode)
tHSDISCK
4
ns
SDI High to SDO High (Chain Mode with BUSY indicator)
tDSDOSDI
VIO above 4.5 V
15
ns
VIO above 2.3 V
26
ns
1 See Error! Reference source not found. and Error! Reference source not found. for load conditions.
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