Datasheet

AD5424/AD5433/AD5445 Data Sheet
Rev. D | Page 14 of 28
03160-062
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 33. Threshold Voltages vs. Supply Voltage
–
120
–100
–80
–60
–
40
–20
0
20
PSRR (dB)
03160-034
1
10 100 1k
10k 100k 1M 10M
FREQUENCY (Hz)
T
A
= 25°
C
V
DD
= 3V
AMP = AD8038
FULL SCALE
ZERO SCALE
Figure 34. Power Supply Rejection vs. Frequency
–90
–85
–80
–75
–70
–
65
–
60
THD + N (dB)
100 1k1 10 10k
100k 1M
FREQUENCY (Hz)
03160-035
T
A
= 25°
C
V
DD
= 3V
V
REF
= 3.5V p-p
Figure 35. THD and Noise vs. Frequency
0
20
40
60
80
100
SFDR (dB)
0 20 40 60 80 100 120 140 160 180 200
f
OUT
(kHz)
03160-036
T
A
= 25°C
V
REF
= 3.5V
AD8038 AMPLIFIER
AD5445
MCLK = 1MHz
MCLK = 200kHz
MCLK = 0.5MHz
Figure 36. Wideband SFDR vs. f
OUT
Frequency
0
10
20
30
40
50
60
70
80
90
SFDR (dB)
0
100 200
300
400 500
600 700
800 900
1000
f
OUT
(kHz)
03160-037
MCLK = 5MHz
MCLK = 10MHz
MCLK = 25MHz
T
A
= 25
°C
V
REF
= 3.5V
AD8038 AMPLIFIER
AD5445
Figure 37. Wideband SFDR vs. f
OUT
Frequency
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
SFDR (dB)
4 60 2 8 10 12
FREQUENCY (MHz)
03160-038
T
A
= 25°C
V
DD
= 5V
AMP = AD8038
AD5445
65k CODES
Figure 38. Wideband SFDR, f
OUT
= 100 kHz, Clock = 25 MHz