Datasheet

ADS7817
5
SBAS066A
TIMING CHARACTERISTICS (Cont.)
At T
A
= +25°C, V
CC
= +5V, V
REF
= +2.5V, f
SAMPLE
= 200kHz, and f
CLK
= 16 • f
SAMPLE
, –In = +2.5V, unless otherwise specified.
73
72
71
70
69
68
67
SIGNAL-TO-NOISE RATIO AND
SIGNAL-TO-(NOISE+DISTORTION)
vs INPUT FREQUENCY
Input Frequency (kHz)
1 10 100
SNR and SINAD (dB)
SNR
SINAD
80
70
60
50
40
30
20
10
SIGNAL-TO-(NOISE+DISTORTION)
vs INPUT LEVEL
Input Level (dB)
–60 –50 –40 –30 –10–20 0
SINAD (dB)
POWER SUPPLY REJECTION vs RIPPLE FREQUENCY
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
Power Supply Rejection (dB)
1 10 100 1000 10000
Ripple Frequency (kHz)
FREQUENCY SPECTRUM
(4096 Point FFT; f
IN
= 9.9kHz, –0.5dB)
0
–20
–40
–60
–80
–100
–120
Amplitude (dB)
0 255075100
Frequency (kHz)
95
90
85
80
75
70
65
SPURIOUS FREE DYNAMIC RANGE AND
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
Input Frequency (kHz)
110100
SFDR (dB)
–95
–90
–85
–80
–75
–70
–65
THD (dB)
SFDR
THD
CHANGE IN INTEGRAL LINEARITY and DIFFERENTIAL
LINEARITY vs SAMPLE RATE
1.5
1.0
0.5
0
–0.5
Delta from f
SAMPLE
= 200kHz (LSB)
0 80 160 240 320 400
Sample Rate (kHz)
Change in Integral
Linearity (LSB)
Change in Differential
Linearity (LSB)