ADS8317_14 Datasheet, PDF (12/36 Pages) Texas Instruments – 16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER

ADS8317
SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS: V_DD = +5V (continued)
At T_A = 25°C, V_REF = 2.5V, f_SAMPLE = 250kHz, f_CLK = 24 × f_SAMPLE, unless otherwise noted.
SPURIOUS-FREE DYNAMIC RANGE AND
TOTAL HARMONIC DISTORTION vs INPUT FREQUENCY
120
115
SFDR
110
105
100
95
THD⁽¹⁾
90
85
80
75
70
NOTE: (1) First nine harmonics of the input frequency.
65
1
10
100
-120
-115
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
200
Frequency (kHz)
EFFECTIVE NUMBER OF BITS vs INPUT FREQUENCY
15.0
14.5
14.0
13.5
13.0
12.5
12.0
1
10
Frequency (kHz)
100 200
Figure 14.
Figure 15.
CHANGE IN SIGNAL-TO-NOISE + DISTORTION
vs TEMPERATURE
0.7
0.6
f_IN = 1.98364kHz, -0.2dB
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-50
-25
0
25
50
75
100
Temperature (°C)
Figure 16.
CHANGE IN SIGNAL-TO-NOISE + DISTORTION
vs INPUT LEVEL
100
f_IN = 1.98364kHz
90
80
70
60
50
40
30
20
10
-80 -70 -60 -50 -40 -30 -20 -10 0
Input Level (dB)
Figure 17.
PEAK-TO-PEAK NOISE FOR A DC INPUT
vs REFERENCE VOLTAGE
100
V_DD = 5V
OUTPUT CODE HISTOGRAM FOR A DC INPUT
(8192 Conversions)
4835
10
1673
1608
1
0.1
1
Reference Voltage (V)
Figure 18.
2 2.5
34
FFFE
FFFF
0000
0001
Code (Hex)
Figure 19.
42
0002
12
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