AD7298-1 查看數據表（PDF） - Analog Devices
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AD7298-1 Datasheet PDF : 24 Pages
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AD7298-1
3.0
VDD = VDRIVE = 3V
2.5
2.0
1.5
1.0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
CURRENT LOAD (mA)
Figure 9. VREF vs. Reference Output Current Drive
–90
VDD = 3V
–92 VDRIVE = 3V
–94
–96
–98
–100
–102
–104
–106
–108
–110
1k
10k
100k
1M
10M
100M
RIPPLE FREQUENCY (Hz)
Figure 10. PSRR vs. Supply Ripple Frequency Without Supply Decoupling
110
105
100
95
90
85
80
75
70
0 50 100 150 200 250 300 350 400 450 500 550
fNOISE (kHz)
Figure 11. Channel-to-Channel Isolation, fIN = 50 kHz
62.0
61.5
VDD = 3V
VDRIVE = 3V
61.0
60.5
60.0
59.5
59.0
RSOURCE = 0Ω
RSOURCE = 10Ω
RSOURCE = 33Ω
58.5
RSOURCE = 47Ω
RSOURCE = 100Ω
RSOURCE = 200Ω
58.0
10
100
INPUT FREQUENCY (kHz)
Figure 12. SINAD vs. Analog Input Frequency for Various Source Impedances
62.00
61.75
VDD = 3V
VDRIVE = 3V
61.50
61.25
61.00
60.75
60.50
1.0
1.5
2.0
2.5
EXTERNAL REFERENCE VOLTAGE (V)
Figure 13. SINAD vs. Reference Voltage
–80
VDD = 3V
–81 VDRIVE = 3V
–82
–83
–84
–85
–86
–87
–88
–89
–90
1.0
1.5
2.0
2.5
EXTERNAL REFERENCE VOLTAGE (V)
Figure 14. THD vs. Reference Voltage
Rev. A | Page 10 of 24
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