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TYPICALCHARACTERISTICSADS7867
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 5 10 15 20 25 30 35 40 45 50
V
DD
= 1.2 v,
f
样本
= 100 ksps,
f
i
= 30 khz,
snr = 60.419 db,
sinad = 59.877 db,
thd (9) = −69.181 db,
sfdr = 73.682 db
f
i
− 输入 频率 − khz
Normalized振幅 − db
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 10 20 30 40 50 60 70 80 90 100
Normalized振幅 − db
V
DD
= 1.6 v,
f
样本
= 200 ksps,
f
i
= 30 khz,
snr = 61.173 db,
sinad = 61.128 db,
thd (9) = −80.986 db,
sfdr = 83.468 db
f
i
− 输入 频率 − khz
250
275
300
325
350
375
400
425
450
1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
V
DD
− 供应 voltage − v
throughput 比率 − ksps
10-位 nmc, t
一个
= 25
°
c,
t
样本
= 2.25/f
SCLK
,
t
dis(eoc-sdoz)
+t
su(lsbz-csf)
= 0.25/f
SCLK
,
throughput 比率 = 14 sclk 循环
150
175
200
225
250
275
1.2 1.4 1.6 1.8
V
DD
− 供应 voltage − v
throughput 比率 − ksps
10-位 nmc, t
一个
= 25
°
c,
t
样本
= 2.375/f
SCLK
,
t
dis(eoc-sdoz)
+t
su(lsbz-csf)
= 0.375/f
SCLK
,
throughput 比率 = 14 sclk 循环
ADS7866
ADS7867
ADS7868
SLAS465–JUNE2005
fft(8192points)
figure19.
fft(8192points)
figure20.
THROUGHPUTRATETHROUGHPUTRATE
vsvs
SUPPLYVOLTAGESUPPLYVOLTAGE
figure21.figure22.
15