ADS8317
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SBAS356A–JUNE 2007–REVISED SEPTEMBER 2007
TYPICAL CHARACTERISTICS: VDD = +2.7V (continued)
At TA = 25°C, VREF = 1.25V, fSAMPLE = 200kHz, fCLK = 24 × fSAMPLE, unless otherwise noted.
SPURIOUS-FREE DYNAMIC RANGE
AND TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
110
105
100
95
-110
-105
-100
-95
15.0
14.5
14.0
13.5
13.0
12.5
12.0
SFDR
THD(1)
90
-90
85
-85
NOTE: (1) First nine harmonics of the input frequency.
80
-80
200
200
1
10
100
1
10
100
Frequency (kHz)
Figure 32.
Frequency (kHz)
Figure 33.
CHANGE IN SIGNAL-TO-NOISE + DISTORTION
vs TEMPERATURE
SIGNAL-TO-NOISE + DISTORTION
vs INPUT LEVEL
0.6
0.5
100
90
80
70
60
50
40
30
20
10
0
fIN = 1.97754kHz
fIN = 1.97754kHz, -0.2dB
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
75
100
0
-50
-25
0
25
50
-80
-70
-60
-50
-40
-30
-20
-10
Temperature (°C)
Input Level (dB)
Figure 34.
Figure 35.
OUTPUT CODE HISTOGRAM FOR A DC INPUT
(8192 Conversions)
3920
1596
1504
581
497
50
41
2
1
0001 0002 0003 0004
FFFC FFFD FFFE FFFF 0000
Code (Hex)
Figure 36.
Copyright © 2007, Texas Instruments Incorporated
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