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AD7997 Scheda tecnica(PDF) 12 Page - Analog Devices

Il numero della parte AD7997
Spiegazioni elettronici  8-Channel, 10- and 12-Bit ADCs with I2CCompatible
PDF  32 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7997 Scheda tecnica(HTML) 12 Page - Analog Devices

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AD7997/AD7998
Rev. 0 | Page 12 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
–120
–100
–80
–60
–40
–20
0
20
40
060
FREQUENCY (kHz)
FS = 121kSPS
FSCL = 3.4MHz
FIN = 10kHz
SNR = 71.84dB
SINAD = 71.68dB
THD = 86.18dB
SFDR = –88.70dB
Figure 4. AD7998 Dynamic Performance with 5 V Supply and
2.5 V Reference, 121 kSPS, Mode 1
–110
–90
–70
–50
–30
–10
10
40
060
40
45
50
60
70
75
1
1000
FREQUENCY (kHz)
100
10
VDD = 4.5V
VDD = 3V
VDD = 2.7V
VDD = 3.3V
VDD = 5V
65
55
VDD = 5.5V
INPUT FREQUENCY (kHz)
20
30
50
FS = 121kSPS
FSCL = 3.4MHz
FIN = 10kHz
SINAD = 61.63dB
THD = 91.82dB
SFDR = –94.95dB
Figure 5. AD7997 Dynamic Performance with 5 V Supply and
2.5 V Reference, 121 kSPS, Mode 1
20
40
70
80
90
100
10
1000
SUPPLY RIPPLE FREQUENCY (kHz)
100
VDD = 3V
VDD = 5V
50
30
60
VDD = 3V/5V

200mV p-p SINE WAVE
ON VDD
2nF CAPACITOR ON VDD
Figure 6. PSRR vs. Supply Ripple Frequency
Figure 7. AD7998 SINAD vs. Analog Input Frequency for
Various Supply Voltages, 3.4 MHz fSCL, 136 kSPS
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
2000
1500
500
1000
0
2500
3000
3500
4000
CODE
Figure 8. Typical INL, VDD = 5.5 V, Mode 1, 3.4 MHz fSCL, 121 kSPS
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
2000
1500
500
1000
0
2500
3000
3500
4000
CODE
Figure 9. Typical DNL, VDD = 5.5 V, Mode 1, 3.4 MHz fSCL, 121 kSPS



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