TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, and internal +2.5V reference, unless otherwise specified.
SIGNAL-TO-NOISE RATIO and
SIGNAL-TO-(NOISE+DISTORTION)
vs INPUT FREQUENCY
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 99.7kHz, –0.2dB)
0.00
–20
76
74
72
70
68
66
64
62
60
SNR
–40
SINAD
–60
–80
–100
–120
0
50
100
150
200
250
1
10
100
1000
Frequency (kHz)
Input Frequency (kHz)
SPURIOUS FREE DYNAMIC RANGE
and TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
SIGNAL-TO-NOISE and
SIGNAL-TO-(NOISE+DISTORTION)
vs TEMPERATURE
95
90
85
80
75
70
65
60
55
50
–95
–90
–85
–80
–75
–70
–65
–60
–55
–50
0.3
0.2
fIN = 10kHz, –0.2dB)
0.1
SFDR
0.
SNR
THDꢀ
–0.1
–0.2
–0.3
–0.4
–0.5
SINAD
ꢀꢀ
First nine harmonics
of an input frequency
–40
–20
0
20
40
60
80
100
1
10
100
Input Frequency (kHz)
1000
Temperature (°C)
ADS7834
6
SBAS098A
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