ADS7868IDBVTG4 Datasheet, PDF (11/28 Pages) Burr-Brown (TI) – 1.2-V, 12-/10-/8-BIT, 200-KSPS/100-KSPS, MICRO-POWER, MINIATURE ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE

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TYPICAL CHARACTERISTICS ADS7866
FFT (8192 Points)
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
10
20
30
40
50
60
70
80
90
f_i − Input Frquency − kHz
Figure 2.
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
FFT (8192 Points)
5
10
15
20
25
30
35
40
45
f_i − Input Frquency − kHz
Figure 3.
ADS7866
ADS7867
ADS7868
SLAS465 – JUNE 2005
100
50
SIGNAL-TO-NOISE RATIO
vs
INPUT FREQUENCY
73
72.5
72 ^VDD ^{= 2.5 V, 200 KSPS}
71.5
V_DD = 3.6 V,
200 KSPS
71
70.5
V_DD = 1.6 V,
200 KSPS
70
V_DD = 1.2 V,
100 KSPS
69.5
69
68.5
68
67.5
67
1
10
100
f_i − Input Frequency − kHz
1000
Figure 4.
SIGNAL-TO-NOISE
AND DISTORTION
vs
INPUT FREQUENCY
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
73
V_DD = 3.6 V, 200 KSPS
71
V_DD = 2.5 V,
69
200 KSPS
67
65
V_DD = 1.2 V,
100 KSPS
V_DD = 1.6 V,
200 KSPS
−56
THD Using 2nd − 10th harmonics,
−58 TA = 25°C
−60
−62
−64
V_DD = 1.6 V, 200 KSPS
−66
−68
V_DD = 2.5 V,
200 KSPS
−70
V_DD = 1.2 V,
100 KSPS
63
−72
−74
61
−76
−78
59
−80
V_DD = 3.6V,
200 KSPS
57
1
−82
10
100
1000
1
10
100
1000
f_i − Input Frequency − kHz
f_i − Input Frequency − kHz
Figure 5.
Figure 6.
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