Datasheet

Data Sheet AD5429/AD5439/AD5449
Rev. E | Page 11 of 28
0
2
4
6
8
10
12
14
I
DD
(mA)
10k1k10 1001 100k 1M 10M 100M
FREQUENCY (Hz)
04464-041
T
A
= 25°C
LOADING ZS TO FS
V
DD
= 5V
V
DD
= 3V
V
DD
= 2.5V
Figure 19. Supply Current vs. Update Rate
–102
–66
–54
–42
–30
–18
–6
6
1
100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
GAIN (dB)
T
A
= 25°
C
LOADING
ZS
TO FS
0
–60
–48
–36
–24
–12
–84
–72
–78
–90
–96
T
A
= 25°C
V
DD
= 5V
V
REF
= ±3.5V
C
COMP
= 1.8pF
AMP = AD8038
ALL
ON
DB1
1
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
ALL
OFF
04464-042
10
Figure 20. Reference Multiplying Bandwidth vs. Frequency and Code
–0.8
–0.6
–0.4
–0.2
0
0.2
GAIN (dB)
10k1k
10 1001
100k
1M 10M 100
M
FREQUENCY (Hz)
04464-043
T
A
= 25
°C
V
DD
= 5V
V
REF
= ±3.5V
C
COMP
= 1.8pF
AMP = AD8038
Figure 21. Reference Multiplying Bandwidth—All 1s Loaded
–9
–6
–3
0
3
10k 100k
1M 10M
100M
FREQUENC
Y (Hz)
T
A
= 25°C
V
DD
= 5V
GAIN (dB)
04464-044
V
REF
= ±2V, AD8038 C
C
1.47pF
V
REF
=
±2V, AD8038 C
C
1pF
V
REF
=
±0.15
V
, AD8038 C
C
1pF
V
REF
=
±0.15
V,
AD8038 C
C
1.47pF
V
REF
=
±3.51
V,
AD8038 C
C
1.8pF
Figure 22. 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)
04464-045
T
A
= 25°C
V
REF
= 0V
AMP = AD8038
C
COMP
= 1.8pF
0x7FF TO 0x800
0x800 TO 0x7FF
V
DD
= 5V
V
DD
= 3V
V
DD
= 3V
V
DD
= 5V
Figure 23. Midscale Transition, V
REF
= 0 V
OUTPUT VOLTAGE (V)
0 20 40 60 80 100 120 140 160 180 200
TIME (ns)
04464-046
–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
AMP = AD8038
C
COMP
= 1.8pF
Figure 24. Midscale Transition, V
REF
= 3.5 V