Datasheet

AD7923 Data Sheet
Rev. D | Page 8 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (kHz)
SNR (dB)
–10
–
50
–
30
–
70
–
90
–110
0 10 20 30 40 60
70
80 90
50 100
03096-004
4096 POINT FFT
AV
DD
= 4.75V
f
SAMPLE
= 200kSPS
f
IN
= 50 kHz
SINAD = 70.714dB
THD = –82.853dB
SFDR =
–
84.815dB
Figure 4. Dynamic Performance at 200 kSPS
INPUT FREQUENCY (kHz)
SINAD (dB)
75
70
65
60
0
100
03086-005
f
SAMPLE
= 200kSPS
T
A
= 25°C
RANGE = 0V TO REF
IN
AV
DD
= V
DRIVE
= 5.25V
AV
DD
= V
DRIVE
= 4.75V
AV
DD
= V
DRIVE
= 3.6V
AV
DD
= V
DRIVE
= 2.7V
Figure 5. SINAD vs. Analog Input Frequency for Various Supply Voltages at
200 kSPS
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
0
–90
–80
–70
–60
–50
–40
–30
–20
–10
0 20 40 60 80 100 120 140 160 180 200
03086-006
AV
DD
= 5V
200mV p-p SINE WAVE ON AV
DD
REF
IN
= 2.5V, 1µF CAPACITOR
T
A
= 25°C
Figure 6. PSRR vs. Supply Ripple Frequency
INPUT FREQUENCY (kHz)
THD (dB)
–
50
–90
–
85
–
80
–75
–
70
–65
–60
–55
10 100
03086-007
f
SAMPLE
= 200kSPS
T
A
= 25°
C
RANGE = 0V TO REF
IN
AV
DD
= V
DRIVE
= 5.25V
AV
DD
= V
DRIVE
= 4.75V
AV
DD
= V
DRIVE
= 2.7V
AV
DD
= V
DRIVE
= 3.6V
Figure 7. THD vs. Analog Input Frequency
for Various Supply Voltages at 200 kSPS
INPUT FREQUENCY (kHz)
THD (dB)
–55
–95
–90
–85
–80
–
75
–70
–65
–60
10 100
03086-008
f
SAMPLE
= 200kSPS
T
A
= 25°
C
AV
DD
= 5.25V
RANGE = 0V TO REF
IN
R
IN
= 100Ω
R
IN
= 1000Ω
R
IN
= 10Ω
R
IN
= 50Ω
Figure 8. THD vs. Analog Input Frequency for Various Source Impedances
CODE
INL ERROR (LSB)
1.0
0.6
0.8
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0 512 1024 1536 2048 2560 3072 3584 4096
03096-009
AV
DD
= V
DRIVE
= 5V
TEMP = 25°C
Figure 9. Typical INL