Data Sheet AD7400
Rev. G | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, using a 20 kHz brick wall filter, unless otherwise noted.
100
0
20
10
30
40
50
60
70
80
90
1000 200 300 400 500 600 700 800 900 1000
04718-005
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
200mV p-p SINEWAVE ON V
DD1
NO DECOUPLING
V
DD1
= V
DD2
= 4.5V TO 5.25V
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
35003000
25002000
15001000500
04718-006
INPUT FREQUENC
Y (Hz)
SINAD (dB)
V
DD1
= V
DD2
= 4.5V
V
DD1
= V
DD2
= 5.25V
V
DD1
= V
DD2
= 5V
Figure 7. SINAD vs. Analog Input Frequency for Various Supply Voltages
FREQUENCY (kHz)
(dB)
0
–20
–180
–160
–140
–120
–100
–80
–60
–40
0 2018161412
108642
04718-007
8192 POINT FFT
f
IN
= 35Hz
SINAD = 79.6991dB
THD = –92.6722dB
DECIMATION B
Y 256
Figure 8. Typical FFT, ±200 mV Range
(Using Sinc
3
Filter, 256 Decimation Rate)
0
–90
–80
–70
–60
–50
–40
–30
–20
–10
0.195 0.3150.215 0.235 0.255 0.275 0.295
04718-008
± INPUT AMPLITUDE (V)
SINAD (dB)
V
DD1
= V
DD2
= 5V
Figure 9. SINAD vs. V
IN
CODE
DNL ERROR (LSB)
0.5
–0.4
–0.3
–0.2
0
–0.1
0.1
0.2
0.3
0.4
04718-009
0 600005000040000300002000010000
V
IN
+ = –200mV TO +200mV
V
IN
– = 0V
Figure 10. Typical DNL, ±200 mV Range
(Using Sinc
3
Filter, 256 Decimation Rate)
CODE
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
0 6000050000400003000020000
10000
04718-010
V
IN
+ = –200mV TO +200mV
V
IN
– = 0V
INL ERROR (LSB)
Figure 11. Typical INL, ±200 mV Range
(Using Sinc
3
Filter, 256 Decimation Rate)
