Datasheet

AD7655
Rev. B | Page 13 of 28
FREQUENCY (kHz)
SNR AND SINAD (dB)
85
80
75
70
1
10 100
1000
100
95
90
SNR
SINAD
ENOB (Bits)
14.5
14.0
13.5
13.0
16.0
15.5
15.0
ENOB
03536-011
Figure 11. SNR, SINAD, and ENOB vs. Frequency
FREQUENCY (kHz)
THD, HARMONICS (dB)
–90
–95
–100
–105
–110
1
10 100
1000
–75
–80
–85
SFDR
CROSSTALK B TO A
CROSSTALK A TO B
THD
THIRD HARMONIC
SECOND HARMONIC
03536-012
SFDR (dB)
90
85
80
75
70
105
100
95
Figure 12. THD, Harmonics, Crosstalk, and SFDR vs. Frequency
–55 5 65 125
TEMPERATURE (
°
C)
LSB
0
–4
–5
–2
–3
–1
2
1
4
3
5
25–35 –15 45 85 105
03536-013
FULL-SCALE ERROR
ZERO ERROR
Figure 13. 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
03536-014
Figure 14. Operating Currents vs. Sample Rate
C
L
(pF)
t
18
DELAY (ns)
20
10
0
0 50 100 200
50
40
30
OVDD = 2.7V @ 85°C
OVDD = 2.7V @ 25°C
OVDD = 5V @ 85°C
OVDD = 5V @ 25°C
150
03536-015
Figure 15. Typical Delay vs. Load Capacitance C
L