Datasheet

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