Datasheet

AD7441/AD7451
Rev. D | Page 10 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, f
S
= 1 MSPS, f
SCLK
= 18 MHz, V
DD
= 2.7 V to 5.25 V, V
REF
= 2.5 V, unless otherwise noted.
75
55
60
65
70
10 100 1000
FREQUENCY (kHz)
SINAD (dB)
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 3.6V
V
DD
= 2.7V
03153-007
Figure 7. SINAD vs. Analog Input Frequency for the AD7451 for
Various Supply Voltages
0
–120
–80
–100
–60
–40
–20
0 100 200 300 400 500 600 700 800 900 1000
SUPPLY RIPPLE FREQUENCY (kHz)
PSRR (dB)
100mV p-p SINE WAVE ON V
DD
NO DECOUPLING ON V
DD
V
DD
= 3V
V
DD
= 5V
03153-008
Figure 8. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
FREQUENCY (kHz)
SNR (dB)
0 100 200
–100
–140
500
–20
0
–120
–40
–60
–80
8192 POINT FFT
f
SAMPLE
= 1MSPS
f
IN
= 100kSPS
SINAD = 71dB
THD = –82dB
SFDR = –83dB
300 400
03153-009
Figure 9. AD7451 Dynamic Performance for V
DD
= 5 V
DNL ERROR (LSB)
CODE
0.4
0 1024 2048 3072
0.2
0
–0.2
–0.4
–1.0
4096
0.6
0.8
1.0
–0.6
–0.8
03153-010
Figure 10. Typical DNL for the AD7451 for V
DD
= 5 V
INL ERROR (LSB)
CODE
0.4
0 1024 2048 3072
0.2
0
–0.2
–0.4
–1.0
4096
0.6
0.8
1.0
–0.6
–0.8
03153-011
Figure 11. Typical INL for the AD7451 for V
DD
= 5 V
COUNTS
CODES
0
2046 2047 2048 2049 2050 2051
27 CODES 24 CODES
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
9949
CODES
03153-012
Figure 12. Histogram of 10,000 Conversions of a DC Input for the AD7451