Datasheet

AD7992
Rev. 0 | Page 10 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
–120
–100
–80
–60
–40
–20
0
SINAD (dB)
20 40060
60
62
64
66
68
70
72
74
76
1 10 100
INPUT FREQUENCY kHz
SINAD (dB)
V
DD
= 5.5V
V
DD
= 5.0V
V
DD
= 4.5V
V
DD
= 2.7V
V
DD
= 3.0V
V
DD
= 3.3V
V
REF
= V
DD
03263-0-020
FREQUENCY (kHz)
03263-0-024
F
S
= 121kSPS
F
SCL = 3.4MHz
F
IN
= 10kHz
SNR = 71.84dB
SINAD = 71.68dB
THD = –86.18dB
SFDR = –88.70dB
Figure 4. Dynamic Performance with 5 V Supply and 2.5 V Reference,
121 kSPS, Mode 1, Single-Channel Mode
–120
–100
–80
–60
–40
–20
0
FREQUENCY (kHz)
SINAD (dB)
SNR = 73.23dB
SINAD = 73.10dB
THD = –88.59dB
SFDR = –90.46dB
F
S
= 121kSPS
F
SCL
= 3.4MHz
F
IN
= 10kHz
06010 20 30 40 50
03263-0-021
Figure 5. Dynamic Performance with 5.5 V Supply and 5.5 V Reference,
121 KSPS, Mode 1, Dual-Channel Mode
20
40
70
80
90
100
PSRR (dB)
10 1000
SUPPLY-RIPPLE FREQUENCY(kHz)
03263-0-025
100
V
DD
= 3V
V
DD
= 5V
50
30
60
V
DD
= 3V/5V
 200mV p-p SINE WAVE
ON V
DD
2nF CAPACITOR ON V
DD
Figure 6. PSRR vs. Supply-Ripple Frequency, Single-Channel Mode Only
Figure 7. SINAD vs. Analog Input Frequency for Various Supply Voltages at
136 kSPS with 3.4 MHz f
SCL
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
INL ERROR (LSB)
20001500500 10000 2500 3000 3500 4000
CODE
03263-0-026
Figure 8. Typical INL, V
DD
= 5.5 V, Reference = 2.5 V, Mode 1,
3.4 MHz f
SCL
, 121 kSPS
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
DNL ERROR (LSB)
20001500500 10000 2500 3000 3500 4000
CODE
03263-0-027
Figure 9. Typical DNL, V
DD
= 5.5 V, Reference = 2.5 V Mode 1,
3.4 MHz f
SCL
, 121 kSPS