Datasheet

AD7440/AD7450A
Rev. C | Page 12 of 28
AD7440/AD7450A–TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, f
S
= 1 MSPS, f
SCLK
= 18 MHz, unless otherwise noted.
75
70
65
60
55
10 100 1000
03051-A-007
FREQUENCY (kHz)
SINAD (dB)
V
DD
= 5.25V V
DD
= 4.75V
V
DD
= 3.6V
V
DD
= 2.7V
Figure 7. AD7450A SINAD vs. Analog Input Frequency for Various
Supply Voltages
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10 1000100 10000
03051-A-008
FREQUENCY (kHz)
CMRR (dB)
V
DD
= 3V
V
DD
= 5V
Figure 8. CMRR vs. Frequency for V
DD
= 5 V and 3 V
0
–120
–20
–40
–60
–80
–100
0 100 200 300 400 500 600 700 800 900 1000
03051-A-009
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
100mV p-p SINEWAVE ON V
DD
NO DECOUPLING ON V
DD
V
DD
= 3V
V
DD
= 5V
Figure 9. PSRR vs. Supply Ripple Frequency without Supply Decoupling
0
–140
–120
–100
–80
–60
–40
–20
0 100 200 300 400 500
03051-A-010
FREQUENCY (kHz)
SNR (dB)
8192 POINT FFT
f
SAMPLE
= 1MSPS
f
IN
= 100kSPS
SINAD = +71.7dB
THD = –82dB
SFDR = –83dB
Figure 10. AD7450A Dynamic Performance with V
DD
= 5 V
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 1024 2048 3072 4096
03051-A-011
CODE
DNL ERROR (LSB)
Figure 11. Typical DNL for the AD7450A for V
DD
= 5 V
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 1024 2048 3072 4096
03051-A-012
CODE
INL ERROR (LSB)
Figure 12. Typical INL for the AD7450A for V
DD
= 5 V