Datasheet

AD7674
Rev. A | Page 14 of 28
INPUT LEVEL (dB)
–60
SNR REFERRED TO FULL SCALE (dB)
101
98
95
96
100
03083-0-017
99
97
SNR
–50 0–10–20–30–40
105
102
104
103
V
REF
= 4.096V
S/(N+D)
Figure 17. SNR and S/(N+D) vs. Input Level
–55
SNR, S/[N+D] (dB)
98
96
03083-0-018
99
97
–35 12585655–15
100
SNR
ENOB
14.5
15.0
15.5
16.5
16.0
S/(N+D)
25 45 105
TEMPERATURE (°C)
V
REF
= 4.096V
Figure 18. SNR, S/(N+D), and ENOB vs. Temperature
TEMPERATURE (°C)
–55
THD, HARMONICS (dB)
–120
–140
03083-0-019
–110
–130
–35 12585655–15
–100
25 45 105
THIRD
HARMONIC
SECOND
HARMONIC
THD
Figure 19. THD and Harmonics vs. Temperature
SAMPLING RATE (SPS)
100000
OPERATING CURRENTS (μA)
0.001
1M
10000
1000
100
10
1
0.1
0.01
100k10k1k1001
AVDD, WARP/NORMAL
AVDD, IMPULSE
10
DVDD, WARP/NORMAL
DVDD, IMPULSE
OVDD, ALL MODES
PDBUF HIGH
03083-0-020
Figure 20. Operating Current vs. Sampling Rate
TEMPERATURE ( ° C)
800
–55
POWER-DOWN OPERATING CURRENTS (nA)
700
500
300
0
400
100
600
125
DVDD
–35–155 25456585105
AVDD
OVDD
03083-0-021
Figure 21. Power-Down Operating Currents vs. Temperature
TEMPERATURE ( ° C)
–55
ZERO ERROR,POSITIVE AND
NEGATIVE FULL SCALE (LSB)
–15
–25
03083-0-022
–20
–35 12585655–15
25
25 45 105
–5
5
–10
0
10
15
20
POSITIVE
FULL SCALE
NEGATIVE
FULL SCALE
ZERO ERROR
Figure 22. Zero Error, Positive and Negative Full Scale vs. Temperature