AD7398 查看數據表（PDF） - Analog Devices
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AD7398 Datasheet PDF : 24 Pages
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AD7398/AD7399
100
90
VOUT (50mV/DIV)
10
CLOCK (5V/DIV)
0%
TIME (100ns/DIV)
Figure 16. AD7398 Digital Feedthrough
VDD = +5V, VSS = –5V, VREF = +5V
DLY 54µs
100
VOUT (2V/DIV)
90
10
0%
5V
2v
CS (5V/DIV)
5µs
TIME (5µs/DIV)
Figure 17. AD7398 Large Signal Settling Time
VDD = +5V, VSS = –5V, VREF = +5V
A2 0.8V
DLY 67µs
100
VOUT (2V/DIV)
90
10
0%
5V
CS (5V/DIV)
2V
2µs
TIME (2µs/DIV)
Figure 18. AD7398 Shutdown Recovery
0xFFF
0x800
0x400
0x200
0x100
0x080
0x040
0x020
0x010
0x008
0x004
0x002
0x001
0x000
100
0
–12
–24
–36
–48
–60
–72
–84
VDD = +5V
VSS = –5V
VREF = +100mV rms
TA = 25°C
–96
–108
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 19. AD7398 Multiplying Gain vs. Frequency
5
TA = 25°C
1. VDD = +5V, VSS = –5V, CODE = 0x000, 0xFFF
3. VDD = +5V, VSS = –5V, CODE = 0x555
2
4 3. VDD = +5V, VSS = 0V, CODE = 0x000, 0xFFF
4
4. VDD = +5V, VSS = 0V, CODE = 0x555
5. VDD = +3V, VSS = 0V, CODE = 0x000, 0xFFF
6. VDD = +3V, VSS = 0V, CODE = 0x555
3
1
6
2
3
5
1
0
1k
10k
100k
1M
10M
100M
CLOCK FREQUENCY (Hz)
Figure 20. AD7398 Supply Current vs. Clock Frequency
2.00
AD7398
TA = 25°C
±5V
VREF = +2.5V
DUAL SUPPLY
1.75
±3V
SINGLE SUPPLY
1.50
1.25
1.00
2
3
4
5
6
POWER SUPPLY VOLTAGE (V)
Figure 21. AD7398 Supply Current vs. Supply Voltage
Rev. C | Page 12 of 24
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