AD7651 Datasheet, PDF (13/28 Pages) Analog Devices – 16-Bit 100 kSPS PulSAR Unipolar ADC with Reference

–70
–75
–80
–85
–90
–95
–100
–105
–110
–115
–120
1
120
110
SFDR
100
90
80
70
THIRD
HARMONIC
THD
60
50
SECOND
HARMONIC
40
30
10
100
FREQUENCY (kHz)
20
1000
02964-0-031
Figure 11. THD, Harmonics, and SFDR vs. Frequency
90
89
88
SNR
87
S/[N+D]
86
85
–60
–50
–40
–30
–20
–10
0
INPUT LEVEL (dB)
02964-0-032
Figure 12. SNR and S/(N+D) vs. Input Level (Referred to Full Scale)
89
15.5
88
15.0
87
SNR
14.5
86
S/[N+D]
14.0
85
–55 –35 –15
5 25 45 65
TEMPERATURE (dB)
13.5
85 105 125
02964-0-033
Figure 13. SNR, S/(N+D), and ENOB vs. Temperature
AD7651
–100
–105
–110
–115
THD
THIRD
HARMONIC
SECOND
HARMONIC
–120
–55 –35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
02964-0-034
Figure 14. THD and Harmonics vs. Temperature
10000
1000
AVDD
100
DVDD
10
1
OVDD
0.1
0.01
0.001
10
PDREF = PDBUF = HIGH
100
1000
10000
SAMPLE RATE (SPS)
100000
02964-0-035
Figure 15. Operating Current vs. Sample Rate
6
5
4
3
2
1
0
–1
–2
–3
–4
–5
–6
–55 –35 –15
FULL SCALE
ZERO ERROR
5 25 45 65
TEMPERATURE (°C)
85 105 125
02964-0-036
Figure 16. Zero Error, Full Scale with Reference vs. Temperature
Rev. 0 | Page 13 of 28