www.德州仪器.com
TYPICALCHARACTERISTICSADS7866
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 10 20 30 40 50 60 70 80 90 100
f
i
− 输入 frquency − khz
Normalized振幅 − db
V
DD
= 1.6 v,
f
样本
= 200 ksps,
f
i
= 30 khz,
snr = 72.31 db,
sinad = 71.97 db,
thd (9) = −83.18 db,
sfdr = 86.83 db
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 5 10 15 20 25 30 35 40 45 50
f
i
− 输入 frquency − khz
Normalized振幅 − db
V
DD
= 1.2 v,
f
样本
= 100 ksps,
f
i
= 30 khz,
snr = 71.42 db,
sinad = 67.62 db,
thd (9) = −69.96 db,
sfdr = 75.14 db
−82
−80
−78
−76
−74
−72
−70
−68
−66
−64
−62
−60
−58
−56
1
10
100
1000
V
DD
= 3.6v,
200 ksps
V
DD
= 2.5 v,
200 ksps
V
DD
= 1.6 v, 200 ksps
V
DD
= 1.2 v,
100 ksps
THD使用 2nd − 10th 和声学,
T
一个
= 25
°
C
f
i
− 输入 频率 − khz
thd − total 调和的 扭曲量 − db
67
67.5
68
68.5
69
69.5
70
70.5
71
71.5
72
72.5
73
1 10 100 1000
V
DD
= 3.6 v,
200 ksps
V
DD
= 2.5 v, 200 ksps
V
DD
= 1.6 v,
200 ksps
V
DD
= 1.2 v,
100 ksps
f
i
− 输入 频率 − khz
snr − 信号-至-噪音 比率 − db
57
59
61
63
65
67
69
71
73
1
10
100
1000
V
DD
= 3.6 v, 200 ksps
f
i
− 输入 频率 − khz
V
DD
= 2.5 v,
200 ksps
V
DD
= 1.6 v,
200 ksps
V
DD
= 1.2 v,
100 ksps
sinad − 信号-至-噪音 和 扭曲量 − db
ADS7866
ADS7867
ADS7868
SLAS465–JUNE2005
fft(8192points)
figure2.
fft(8192points)
figure3.
信号-至-noiseratiosignal-至-noisetotalharmonicdistortion
vsANDDISTORTIONvs
INPUTFREQUENCYvsINPUTFREQUENCY
INPUTFREQUENCY
figure4.figure5.figure6.
11
: 点此下载
