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Data Sheet
AD7400A
Rev. D | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, using 20 kHz brickwall filter, unless otherwise noted.
110
0
10
20
30
40
50
60
70
80
90
100
1k
10k
100k
1M
10M
P
S
RR
(
d
B)
SUPPLY RIPPLE FREQUENCY (Hz)
VDD1 = VDD2 = 5V
NO DECOUPLING CAPACITOR
VRIPPLE = 200mV SINE WAVE ON VDD1
07077-
005
Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
(1 MHz Filter Used)
0
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
4000
3500
3000
2500
2000
1500
1000
500
INPUT FREQUENCY (Hz)
S
INAD
(
d
B)
VDD1 = VDD2 = 4.5V
VDD1 = VDD2 = 5.5V
VDD1 = VDD2 = 5V
07077-
006
Figure 7. SINAD vs. Analog Input Frequency for Various Supply Voltages
FREQUENCY (kHz)
(d
B)
0
–20
–180
–160
–140
–120
–100
–80
–60
–40
0
20
18
16
14
12
10
8
6
4
2
8192 POINT FFT
fIN = 35Hz
SINAD = 79.6991dB
THD = –92.6722dB
DECIMATION BY 256
07077-
007
Figure 8. Typical FFT, ±200 mV Range
(Using Sinc3 Filter, 256 Decimation Rate)
–85
–80
–75
–70
–65
–60
50
100
150
200
300
250
350
S
INAD
(
d
B)
INPUT AMPLITUDE (mV)
VDD1 = VDD2 = 5V
TA = 25°C
07077-
008
Figure 9. SINAD vs. VIN
CODE
DNL
E
RRO
R
(
L
S
B)
0.5
–0.4
–0.3
–0.2
0
–0.1
0.1
0.2
0.3
0.4
0
60,000
50,000
40,000
30,000
20,000
10,000
VIN+ = –200mV TO +200mV
VIN– = 0V
07077-
009
Figure 10. Typical DNL, ±200 mV Range
(Using Sinc3 Filter, 256 Decimation Rate)
CODE
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
0
60,000
50,000
40,000
30,000
20,000
10,000
VIN+ = –200mV TO +200mV
VIN– = 0V
INL
E
RRO
R
(
L
S
B)
07077-
010
Figure 11. Typical INL, ±200 mV Range
(Using Sinc3 Filter, 256 Decimation Rate)