Data Sheet AD7400A
Rev. D | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, using 20 kHz brickwall filter, unless otherwise noted.
110
0
10
20
30
40
50
60
70
80
90
100
100 1k 10k 100k 1M 10M
PSRR (dB)
SUPPLY RIPPLE FREQUENCY (Hz)
V
DD1
= V
DD2
= 5V
NO DECOUPLING CAPACITOR
V
RIPPLE
= 200mV SINE WAVE ON V
DD1
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 4000350030002500200015001000500
INPUT FREQUENCY (Hz)
SINAD (dB)
V
DD1
= V
DD2
= 4.5V
V
DD1
= V
DD2
= 5.5V
V
DD1
= V
DD2
= 5V
07077-006
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 2018161412108642
8192 POINT FFT
f
IN
= 35Hz
SINAD = 79.6991dB
THD = –92.6722dB
DECIMATION BY 256
07077-007
Figure 8. Typical FFT, ±200 mV Range
(Using Sinc
3
Filter, 256 Decimation Rate)
–85
–80
–75
–70
–65
–60
50 100 150 200 300
250 350
SINAD (dB)
INPUT AMPLITUDE (mV)
V
DD1
= V
DD2
= 5V
T
A
= 25°C
07077-008
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
0 60,000
50,00040,00030,000
20,00010,000
V
IN
+ = –200mV TO +200mV
V
IN
– = 0V
07077-009
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 60,00050,00040,00030,00020,00010,000
V
IN
+ = –200mV TO +200mV
V
IN
– = 0V
INL ERROR (LSB)
07077-010
Figure 11. Typical INL, ±200 mV Range
(Using Sinc
3
Filter, 256 Decimation Rate)
