AD5444 Просмотр технического описания (PDF) - Analog Devices
Номер в каталоге
Компоненты Описание
производитель
AD5444 Datasheet PDF : 28 Pages
| |||
3
TA = 25°C
VDD = 5V
0
–3
–6
–9
10k
VREF = ±2V, AD8038 CCOMP = 1pF
VREF = ±2V, AD8038 CCOMP = 1.5pF
VREF = ±15V, AD8038 CCOMP = 1pF
VREF = ±15V, AD8038 CCOMP = 1.5pF
VREF = ±15V, AD8038 CCOMP = 1.8pF
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 24. Reference Multiplying Bandwidth vs. Frequency
and Compensation Capacitor
0.08
0.06
0.04
0.02
VDD = 5V
0x7FF TO 0x800
NRG = 2.154nV-s
VDD = 3V
0x7FF TO 0x800
NRG = 1.794nV-s
TA = 25°C
VREF = 0V
AD8038 AMP
CCOMP = 1.8pF
0
–0.02
–0.04
–0.06
50
–1.66
–1.68
–1.70
–1.72
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nV-s
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nV-s
75 100 125 150 175 200 225 250
TIME (ns)
Figure 25. Midscale Transition, VREF = 0 V
VDD = 5V
0x7FF TO 0x800
NRG = 2.154nV-s
VDD = 3V
0x7FF TO 0x800
NRG = 1.794nV-s
TA = 25°C
VREF = 3.5V
AD8038 AMP
CCOMP = 1.8pF
–1.74
–1.76
–1.78
–1.80
50
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nV-s
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nV-s
75 100 125 150 175 200 225 250
TIME (ns)
Figure 26. Midscale Transition, VREF = 3.5 V
AD5444/AD5446
10
TA = 25°C
0 VDD = 3V
AD8038 AMPLIFIER
–10
–20
–30
–40
–50
FULL SCALE
–60
ZERO SCALE
–70
–80
–90
–100
1
10
100
1k
10k 100k
1M
10M
FREQUENCY (Hz)
Figure 27. Power Supply Rejection Ratio vs. Frequency
–60
TA = 25°C
VDD = 5V
–65 VREF = ±3.5V
–70
–75
–80
–85
–90
100
1k
10k
FREQUENCY (Hz)
100k
Figure 28. THD + Noise vs. Frequency
100
MCLK = 500kHz
80
MCLK = 1MHz
MCLK = 200kHz
60
40
20
TA = 25°C
VREF = 3.5V
AD8038 AMP
0
0
10
20
30
40
50
fOUT (kHz)
Figure 29. Wideband SFDR vs. fOUT Frequency
Rev. C | Page 11 of 28
Share Link: 