VDD = 2.3 V to 4.5 V1, VIO = 2.3 V to 4.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise st" />
參數(shù)資料
型號: AD7942BRMZ
廠商: Analog Devices Inc
文件頁數(shù): 21/24頁
文件大小: 0K
描述: IC ADC 14BIT 250KSPS 10-MSOP
標(biāo)準(zhǔn)包裝: 50
系列: PulSAR®
位數(shù): 14
采樣率(每秒): 250k
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 1.25mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 10-MSOP
包裝: 管件
輸入數(shù)目和類型: 1 個偽差分,單極
產(chǎn)品目錄頁面: 780 (CN2011-ZH PDF)
配用: EVAL-AD7942CB-ND - BOARD EVALUATION FOR AD7942
AD7942
Rev. B | Page 6 of
24
VDD = 2.3 V to 4.5 V1, VIO = 2.3 V to 4.5 V or VDD + 0.3 V, whichever is the lowest, unless otherwise stated, TA = 40°C to +85°C.
Table 4.
Parameter
Symbol
Min
Typ
Max
Unit
Conversion Time: CNV Rising Edge to Data Available
tCONV
0.7
3.2
μs
Acquisition Time
tACQ
1.8
μs
Time Between Conversions
tCYC
5
μs
CNV Pulse Width (CS Mode)
tCNVH
10
ns
SCK Period (CS Mode)
tSCK
25
ns
SCK Period (Chain Mode)
tSCK
VIO ≥ 3 V
29
ns
VIO ≥ 2.7 V
35
ns
VIO ≥ 2.3 V
40
ns
SCK Low Time
tSCKL
12
ns
SCK High Time
tSCKH
12
ns
SCK Falling Edge to Data Remains Valid
tHSDO
5
ns
SCK Falling Edge to Data Valid Delay
tDSDO
VIO ≥ 3 V
24
ns
VIO ≥ 2.7 V
30
ns
VIO ≥ 2.3 V
35
ns
CNV or SDI Low to SDO D13 MSB Valid (CS Mode)
tEN
VIO ≥ 2.7 V
18
ns
VIO ≥ 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
30
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
8
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
36
ns
1 See Figure 2 and Figure 3 for load conditions.
Timing Diagrams
500A
IOL
1.4V
TO SDO
500A
IOH
CL
50pF
0
465
7-
0
02
Figure 2. Load Circuit for Digital Interface Timing
30% VIO
70% VIO
2V OR VIO – 0.5V1
0.8V OR 0.5V2
2V OR VIO – 0.5V1
tDELAY
NOTES
1 2V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.
2 0.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
04
65
7-
0
03
Figure 3. Voltage Reference Levels for Timing
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