AD7984_15 Datasheet, PDF (8/24 Pages) Analog Devices – 18-Bit, 1.33 MSPS PulSAR 10.5 mW ADC in MSOP/LFCSP

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