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timingrequirements,t
一个
=–40°Cto85°C
V
DIG
V
ANA
BUSY
CS
r/c
TAG
数据
DATACLK
同步
R1
在
AGND1
REF
CAP
AGND2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
dw pACKAGE
R2
在
R3
在
sb/btc
ext/int
DGND
PWRD
V
DIG
V
ANA
BUSY
CS
r/c
NC
TAG
NC
数据
DATACLK
同步
R1
在
AGND1
NC
CAP
AGND2
NC
NC
NC
REF
DGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
db pACKAGE
R2
在
sb/btc
ext/int
PWRD
NC
(顶视图)
(顶视图)
NC
R3
在
ADS8509
SLAS324A–OCTOBER2004–REVISEDJUNE2005
PARAMETERMINTYPMAXUNIT
t
w1
pulseduration,convert40ns
t
d1
delaytime,busyfromr/clow620ns
t
w2
pulseduration,busylow2.2µs
t
d2
delaytime,busy,afterendofconversion5ns
t
d3
delaytime,aperture5ns
t
conv
conversiontime2.2µs
t
acq
acquisitiontime1.8µs
t
conv
+t
acq
Cycletime4µs
t
d4
delaytime,r/clowtointernaldataclkoutput270ns
t
c1
cycletime,internaldataclk110ns
t
d5
delaytime,datavalidtointernaldataclkhigh1535ns
t
d6
delaytime,datavalidafterinternaldataclklow2035ns
t
c2
cycletime,externaldataclk35ns
t
w3
pulseduration,externaldataclkhigh15ns
t
w4
pulseduration,externaldataclklow15ns
t
su1
setuptime,r/crise/falltoexternaldataclkhigh15t
C2
+5ns
t
su2
setuptime,r/ctransitiontocstransition10ns
t
d7
delaytime,同步,afterexternaldataclkhigh335ns
t
d8
delaytime,datavalid220ns
t
d9
delaytime,cstorisingedge10ns
t
d10
delaytime,previousdataavailableaftercs,r/clow2µs
t
su3
setuptime,busytransitiontofirstexternaldataclk5ns
t
d11
delaytime,finalexternaldataclktobusyfallingedge1µs
t
su3
setuptime,tagvalid0ns
t
h1
holdtime,tagvalid2ns
5
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