Datasheet

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TYPICAL CHARACTERISTICS ADS7866
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 10 20 30 40 50 60 70 80 90 100
f
i
− Input Frquency − kHz
Normalized Amplitude − dB
V
DD
= 1.6 V,
f
SAMPLE
= 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
− Input Frquency − kHz
Normalized Amplitude − dB
V
DD
= 1.2 V,
f
SAMPLE
= 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 Using 2nd − 10th harmonics,
T
A
= 25°C
f
i
− Input Frequency − kHz
THD − Total Harmonic Distortion − 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
− Input Frequency − kHz
SNR − Signal-to-Noise Ratio − dB
57
59
61
63
65
67
69
71
73
1
10
100
1000
V
DD
= 3.6 V, 200 KSPS
f
i
− Input Frequency − kHz
V
DD
= 2.5 V,
200 KSPS
V
DD
= 1.6 V,
200 KSPS
V
DD
= 1.2 V,
100 KSPS
SINAD − Signal-to-Noise and Distortion − dB
ADS7866
ADS7867
ADS7868
SLAS465 – JUNE 2005
FFT (8192 Points)
Figure 2.
FFT (8192 Points)
Figure 3.
SIGNAL-TO-NOISE RATIO SIGNAL-TO-NOISE TOTAL HARMONIC DISTORTION
vs AND DISTORTION vs
INPUT FREQUENCY vs INPUT FREQUENCY
INPUT FREQUENCY
Figure 4. Figure 5. Figure 6.
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