Datasheet

Data Sheet AD5424/AD5433/AD5445
Rev. D | Page 13 of 28
0
2
4
6
8
10
12
14
I
DD
(mA)
10k1k10 1001 100k 1M 10M 100M
FREQUENCY (Hz)
03160-028
V
DD
= 5V
V
DD
= 2.5V
V
DD
= 3V
T
A
= 25°C
LOADING ZS TO FS
Figure 27. Supply Current vs. Update Rate
GAIN (dB)
10k1k10 1001 100k 1M 10M 100M
FREQUENCY (Hz)
03160-029
–102
–96
–90
–84
–78
–72
–66
–60
–54
–48
–42
–36
–30
–24
–18
–12
–6
0
6
T
A
= 25°C
LOADING
ZS TO FS
ALL ON
ALL OFF
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
T
A
= 25°C
V
DD
= 5V
V
REF
= ±3.5V
INPUT
C
COMP
= 1.8pF
AD8038 AMPLIFIER
AD5445 DAC
Figure 28. Reference Multiplying Bandwidth vs. Frequency and Code
–0.8
–0.6
–0.4
–0.2
0
0.2
GAIN (dB)
10k1k10 1001 100k 1M 10M 100M
FREQUENCY (Hz)
03160-030
T
A
= 25°C
V
DD
= 5V
V
REF
= ±3.5V
C
COMP
= 1.8pF
AD8038 AMPLIFIER
AD5445 DAC
Figure 29. Reference Multiplying Bandwidth—All 1s Loaded
GAIN (dB)
–9
–6
–
3
0
3
03160-031
FREQUENCY (Hz)
100k
10k
1M
10M
100M
T
A
= 25
°
C
V
DD
= 5V
AD5445
V
REF
=
±
2V, AD8038 C
C
1.47pF
V
REF
= ±2V, AD8038 C
C
1pF
V
REF
=
±
0.15V, AD8038 C
C
1pF
V
REF
= ±
0.15V, AD8038 C
C
1.47pF
V
REF
= ±
3.51V, AD8038 C
C
1.8pF
Figure 30. Reference Multiplying Bandwidth vs. Frequency and
Compensation Capacitor
–0.010
–0.005
0.005
0.025
0.035
0.045
0.015
0
0.020
0.030
0.040
0.010
OUTPUT VOLTAGE (V)
0 20 40 60 80 100 120
140 160
180
200
TIME (ns)
03160-032
T
A
= 25°C
V
REF
= 0V
AD8038 AMPLIFIER
C
COMP
= 1.8pF
0x7FF TO 0x800
0x800 TO 0x7FF
V
DD
= 5V
V
DD
= 3V
V
DD
= 3V
V
DD
= 5V
Figure 31. Midscale Transition, V
REF
= 0 V
OUTPUT VOLTAGE (V)
0 20 40 60 80 100 120 140 160 180 200
TIME (ns)
03160-033
–1.77
–1.76
–1.75
–
1.74
–1.73
–1.72
–1.71
–1.70
–1.69
–1.68
0x7FF TO 0x800
0x800 TO 0x7FF
V
DD
= 5V
V
DD
= 3V
V
DD
= 3V
V
DD
= 5V
T
A
= 25°
C
V
REF
= 3.5V
AD8038 AMPLIFIER
C
COMP
= 1.8pF
Figure 32. Midscale Transition, V
REF
= 3.5 V