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AD7933/AD7934
Rev. B | Page 11 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
SUPPLY RIPPLE FREQUENCY (kHz)
P
S
RR
(
d
B)
–60
–70
–80
–90
–110
–100
–120
10
210
610
410
810
1010
100mV p-p SINE WAVE ON VDD AND/OR VDRIVE
NO DECOUPLING
DIFFERENTIAL/SINGLE-ENDED MODE
INT REF
EXT REF
03
71
3-
0
07
Figure 3. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
NOISE FREQUENCY (kHz)
NO
IS
E
I
S
O
L
AT
IO
N
(
d
B)
–70
–75
–90
–85
–80
–95
0
100
400
200
300
600
500
800
700
INTERNAL/EXTERNAL REFERENCE
VDD =5V
03
71
3-
0
21
Figure 4. Channel-to-Channel Isolation
FREQUENCY (kHz)
S
INA
D
(
d
B)
80
20
30
40
50
60
70
0
100
400
200
300
600
500
1000
700
800
900
FSAMPLE = 1.5MSPS
RANGE = 0 TO VREF
DIFFERENTIAL MODE
VDD =5V
VDD =3V
03
71
3-
0
08
Figure 5. AD7934 SINAD vs. Analog Input Frequency for Various Supply Voltages
FREQUENCY (kHz)
0
–10
–20
–50
–40
–30
–90
–100
–80
–70
–60
–110
0
100
200
300
400
500
600
700
03
71
3-
0
09
4096 POINT FFT
VDD =5V
FSAMPLE =1.5MSPS
FIN = 49.62kHz
SINAD = 70.94dB
THD = –90.09dB
DIFFERENTIAL MODE
AM
P
L
IT
UDE
(
d
B)
Figure 6. AD7934 FFT @ VDD = 5 V
CODE
D
NL
E
RRO
R
(
L
S
B
)
1.0
0.8
0.6
0.4
0.2
–0.2
0
–0.8
–0.6
–0.4
–1.0
0
500
2000
1000
1500
3000
2500
4000
3500
VDD =5V
DIFFERENTIAL MODE
03
71
3-
0
10
Figure 7. AD7934 Typical DNL @ VDD = 5 V
CODE
INL
E
RRO
R
(L
S
B)
1.0
0.8
0.6
0.4
0.2
–0.2
0
–0.8
–0.6
–0.4
–1.0
0
500
2000
1000
1500
3000
2500
4000
3500
VDD =5V
DIFFERENTIAL MODE
03
71
3-
0
11
Figure 8. AD7934 Typical INL @ VDD = 5 V