Datasheet

AD5426/AD5432/AD5443 Data Sheet
Rev. G | Page 12 of 24
03162-030
FREQUENCY (Hz)
10M1
10
100
1k
10k
100k
1M
PSRR (dB)
20
–
20
0
–60
–
40
–
100
–
80
–120
T
A
= 25
°
C
V
DD
= 3V
AMPLIFIER = AD8038
FULL SCALE
ZERO SCALE
Figure 30. Power Supply Rejection vs. Frequency
03162-031
FREQUENCY (Hz)
1M1 10 100 1k 10k 100k
THD + N (dB)
–60
–75
–70
–65
–80
–85
–90
T
A
= 25°C
V
DD
= 3V
V
REF
= 3.5V p-p
Figure 31. THD and Noise vs. Frequency
03162-033
VOLTAGE (V)
5.52.5 3.0 3.5 4.0 4.5 5.0
THRESHOLD VOLTAGE (V)
1.8
1.4
1.6
1.0
1.2
0.4
0.6
0.8
0.2
0
T
A
= 25°C
V
IL
V
IH
Figure 32. Threshold Voltages vs. Supply Voltage
03162-034
f
OUT
(kHz)
500 10
20
40
30
SFDR (dB)
100
80
60
40
20
0
T
A
= 25°C
V
REF
= 3.5V
AD8038 AMP
AD5443
MCLK = 500kHz
MCLK = 200kHz
MCLK = 1MHz
Figure 33. Wideband SFDR vs. fOUT Frequency (AD5443)
03162-035
f
OUT
(kHz)
500 10 20 30 40
SFDR (dB)
80
60
40
20
0
T
A
= 25°
C
V
REF
= 3.5V
AD8038 AMP
AD5426
MCLK = 1MHz
MCLK = 200kHz
MCLK = 500kHz
Figure 34. Wideband SFDR vs. fOUT Frequency (AD5426)
03162-036
FREQUENCY (Hz)
5000 50 100 150 200 250 300 350 400 450
SFDR (dB)
0
–20
–10
–40
–30
–60
–50
–80
–90
–70
–100
T
A
= 25°C
V
REF
= 3.5V
AD8038 AMPLIFIER
AD5443
Figure 35. Wideband SFDR fOUT = 50 kHz, Update = 1 MHz