AD7457BRTZ-REEL7 查看數據表（PDF） - Analog Devices
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AD7457BRTZ-REEL7
Analog Devices
AD7457BRTZ-REEL7 Datasheet PDF : 20 Pages
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AD7457
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, fS = 100 kSPS, fSCLK = 10 MHz, VDD = 2.7 V to 5.25 V, VREF = 2.5 V, unless otherwise noted.
75
1.0
0.8
VDD = 5V
0.6
VDD = 3V
70
0.4
0.2
0
–0.2
–0.4
–0.6
65
10
20
30
FREQUENCY (kHz)
40
50
–0.8
–1.0
0
1024
2048
CODE
3072
4096
Figure 5. SINAD vs. Analog Input Frequency for VDD = 3 V and 5 V
Figure 8. Typical DNL for the AD7457 for VDD = 5 V
0
100mV p-p SINE WAVE ON VDD
–20 NO DECOUPLING ON VDD
–40
–60
–80
–100
VDD = 3V
VDD = 5V
–120
–140
0
100 200 300 400 500 600 700 800 900 1000
SUPPLY RIPPLE FREQUENCY (kHz)
Figure 6. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
1024
2048
CODE
3072
4096
Figure 9. Typical INL for the AD7457 for VDD = 5 V
0
8192 POINT FFT
–20
fSAMPLE = 100kSPS
fIN = 30kHz
SINAD = 71dB
THD = –82dB
–40
SFDR = –83dB
–60
–80
–100
–120
–140
0
30
50
100
FREQUENCY (kHz)
Figure 7. Dynamic Performance for VDD = 5 V
10,000
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
2046
9949
CODES
27 CODES
24 CODES
2047
2048
2049
CODES
2050
2051
Figure 10. Histogram of 10,000 Conversions of a DC Input
Rev. A | Page 8 of 20
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