ADS8325_14 Datasheet, PDF (13/37 Pages) Texas Instruments – 16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER

ADS8325
www.ti.com
SBAS226C – MARCH 2002 – REVISED AUGUST 2007
TYPICAL CHARACTERISTICS: V_DD = +2.7V
At T_A = +25°C, V_DD = 2.7V, V_REF = 2.5V, f_SAMPLE = 100kHz, f_CLK = 24 × f_SAMPLE, unless otherwise noted.
INTEGRAL LINEARITY ERROR
vs CODE
3
DIFFERENTIAL LINEARITY ERROR
vs CODE
3
2
2
1
1
0
0
-1
-2
-3
0000_H
4000_H
8000_H
Output Code
Figure 15.
C000_H
FFFF_H
FREQUENCY SPECTRUM
(8192 Point FFT, f_IN = 1.0132kHz, –0.2 dB)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
10
20
30
40
50
Frequency (kHz)
Figure 17.
SIGNAL-TO-NOISE RATIO AND
SIGNAL-TO-NOISE + DISTORTION
vs INPUT FREQUENCY
95
85
SNR
75
65
55
45
1
SINAD
10
Frequency (kHz)
Figure 19.
100 245
-1
-2
-3
0000_H
4000_H
8000_H
Output Code
Figure 16.
C000_H
FFFF_H
FREQUENCY SPECTRUM
(8192 Point FFT, f_IN = 10.0022kHz, –0.2 dB)
0
-20
-40
-60
-80
-100
-120
-140
-160
0
10
20
30
40
50
Frequency (kHz)
Figure 18.
SPURIOUS-FREE DYNAMIC RANGE AND
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
100
-100
90
-90
SFDR
80
-80
70
-70
60
50
NOTE: (1) First nine
harmonics of the
THD⁽¹⁾
input frequency.
40
1
10
Frequency (kHz)
Figure 20.
-60
-50
-40
100 245
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