Datasheet

AD7984
Rev. A | Page 8 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, REF = 5.0 V, VIO = 3.3 V.
2.0
–2.0
0 262144
06973-032
CODE
INL (LSB)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
65536 131072 196608
POSITIVE INL: +1.07LSB
NEGATIVE INL: –0.73LSB
Figure 6. Integral Nonlinearity vs. Code
60k
0
1C
06973-041
CODE IN HEX
COUNTS
50k
40k
30k
20k
10k
1D 1E
007 600
1F
326
20 21 22 23 24 25
326
26 27 28
5992
32350
55354
31003
5708
Figure 7. Histogram of a DC Input at the Code Center
0
–180
0
06973-033
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
–20
–40
–60
–80
–100
–120
–140
–160
100 200 300 400 500 600
f
S
= 1.33MSPS
f
IN
= 10kHz
SNR = 98.2dB
THD = –110.6dB
SFDR = 112.5dB
SINAD = 98.0dB
Figure 8. FFT Plot
2.0
–2.0
0 262144
06973-038
CODE
DNL (LSB)
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
65536 131072 196608
POSITIVE DNL: +0.63LSB
NEGATIVE DNL: –0.34LSB
Figure 9. Differential Nonlinearity vs. Code
60k
0
1D
06973-042
CODE IN HEX
COUNTS
50k
40k
30k
20k
10k
1E 1F
002
20
69
21 22 23 24 25 26 27
37
28 29
00
1801
1378
16593
14653
48273 48266
Figure 10. Histogram of a DC Input at the Code Transition
100
90
–10 0
06973-039
INPUT LEVEL (dB of Full Scale)
SNR (dB)
99
98
97
96
95
94
93
92
91
–9 –8 –7 –6 –5 –4 –3 –2 –1
Figure 11. SNR vs. Input Level