AD7989-1_17 Datasheet, PDF (9/24 Pages) Analog Devices – PulSAR ADCs in MSOP/LFCSP

Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V.
2.0
POSITIVE INL: +0.79 LSB
NEGATIVE INL: –0.68 LSB
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
65536
131072
CODE
196608
Figure 6. INL vs. Code
262144
60k
50975
50k
40k
32476
30k
29064
20k
10k
7795
9064
0⁰
3FFF0
0 29 ⁷⁴⁵
881 _{43 0}
3FFF2
3FFF4
3FFF6
3FFF8
CODE IN HEX
3FFFA
0
3FFFC
Figure 7. Histogram of a DC Input at the Code Center
0
–20
ff_SIN==510k0HkzSPS
SNR = 97.4361dB
SINAD = 97.3577dB
–40
THD = –114.42dB
–60
–80
–100
–120
–140
–160
0
50
100
150
200
250
FREQUENCY (kHz)
Figure 8. AD7989-5 Fast Fourier Transform (FFT) Plot
AD7989-1/AD7989-5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
65536
131072
CODE
196608
Figure 9. DNL vs. Code
262144
50k
44806
45k
43239
40k
35k
30k
25k
20013
20k
16682
15k
10k
5k
2793
3158
0⁰
0
7 ¹⁴⁵
222 _{7 0 0}
0 1 2 3 4 5 6 7 8 9 ABC D
CODE IN HEX
Figure 10. Histogram of a DC Input at the Code Transition
0
–20
–40
–60
–80
–100
–120
–140
–160
0
f_S = 100kSPS
f_IN = 1kHz
SNR = 97.2634dB
SINAD = 97.145dB
THD = –112.7dB
10
20
30
40
50
FREQUENCY (kHz)
Figure 11. AD7989-1 FFT Plot
Rev. B | Page 9 of 24