Datasheet

AD7654
Rev. B | Page 13 of 28
FREQUENCY (kHz)
100
SNR, SINAD (dB)
90
70
80
10 10001 100
95
85
75
16.0
ENOB (Bits)
15.0
13.0
14.0
15.5
14.5
13.5
SNR
SINAD
ENOB
03057-011
Figure 11. SNR, SINAD, and ENOB vs. Frequency
INPUT LEVEL (dB)
92
SNR, SINAD (dB)
90
86
88
–40 –20–60 –30–50 –10 0
SNR
SINAD
03057-012
Figure 12. SNR and SINAD vs. Input Level (Referred to Full Scale)
FREQUENCY (kHz)
THD, HARMONICS, CROSSTALK (dB)
–115
–105
10 10001 100
–110
90
SFDR (dB)
80
60
70
85
75
65
–100
–95
–90
–85
–80
–75
–70
–65
–
60
95
100
105
110
115
SFDR
CROSSTALK B TO A
CROSSTALK A TO B
THD
THIRD
HARMONIC
SECOND
HARMONIC
03057-013
Figure 13. THD, Harmonics, Crosstalk, and SFDR vs. Frequency
TEMPERATURE (°C)
LSB
–10
–15–55 25–35 5 45
–8
–6
–4
–2
0
2
4
6
8
10
65 85 105 125
FULL-SCALE ERROR
ZERO ERROR
03057-014
Figure 14. Full-Scale Error and Zero Error vs. Temperature
OPERATING CURRENTS (mA)
10
1
0.1
100
SAMPLING RATE (kSPS)
10
100
1000
1
NORMAL AVDD
NORMAL DVDD
IMPULSE AVDD
OVDD 2.7V
0.01
0.001
0.0001
IMPULSE DVDD
03057-015
Figure 15. Operating Currents vs. Sample Rate
C
L
(pF)
50
t
18
DELAY (ns)
20
0
10
100 2000 15050
30
40
OVDD = 2.7V @ 85°C
OVDD = 2.7V @ 25°C
OVDD = 5V @ 85°C
OVDD = 5V @ 25°C
03057-016
Figure 16. Typical Delay vs. Load Capacitance C
L