Datasheet

Data Sheet AD5426/AD5432/AD5443
Rev. G | Page 11 of 24
03162-024
FREQUENCY (Hz)
100M1 100 1k10 10k 100k 1M
10M
I
DD
(mA)
3.5
3.0
2.0
2.5
1.5
1
0.5
0
T
A
= 25°C
AD5443
LOADING 010101010101
V
CC
= 5V
V
CC
= 3V
Figure 24. Supply Current vs. Update Rate
03162-025
FREQUENCY (Hz)
100M1
10 100 1k
10k 100k 1M
10M
GAIN (dB)
6
0
–6
–12
–18
–24
–
30
–
36
–42
–48
–54
–60
–
66
–72
–
78
–
84
–90
–
96
–102
LOADING
ZS TO FS
ALL ON
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
ALL OFF
T
A
= 25
°C
V
DD
= 5V
V
REF
=
±3.5V
C
COMP
= 1.8pF
AD8038 AMPLIFIER
Figure 25. Reference Multiplying Bandwidth vs. Frequency and Code
03162-026
FREQUENCY (Hz)
100M1 10 100 1k
10k 100k 1M 10M
GAIN (dB)
0.2
0
–0.2
–
0.4
–0.6
–0.8
T
A
= 25
°C
V
DD
= 5V
V
REF
= ±
3.5V
C
COMP
= 1.8pF
AD8038 AMPLIFIER
Figure 26. Reference Multiplying Bandwidth—All 1s Loaded
03162-027
FREQUENCY (Hz)
100M
10k 100k 1M 10M
GAIN (dB)
3
0
–3
–6
–9
T
A
= 25°C
V
DD
= 5V
AD8038 AMPLIFIER
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
V
REF
= ±
2V, AD8038 C
C
1.47pF
Figure 27. Reference Multiplying Bandwidth vs. Frequency and
Compensation Capacitor
03162-028
TIME (ns)
3000 50 100 150 200 250
OUTPUT VOLTAGE (V)
0.060
0.030
0.040
0.050
0.010
0.020
–0.010
0
–0.020
T
A
= 25°C
V
REF
= 0V
AD8038 AMPLIFIER
C
COMP
= 1.8pF
AD5443
V
DD
3V, 0V REF
NRG = 0.088nVs
0x800 TO 0x7FF
V
DD
5V, 0V REF
NRG = 0.119nVs,
0x800 TO 0x7FF
V
DD
3V, 0V REF
NRG = 1.877nVs
0x7FF TO 0x800
V
DD
5V, 0V REF
NRG = 2.049nVs
0x7FF TO 0x800
Figure 28. Midscale Transition VREF = 0 V
03162-029
TIME (ns)
3000 50 100 150 200 250
OUTPUT VOLTAGE (V)
–1.70
–1.71
–1.72
–1.73
–1.74
–1.75
–1.76
T
A
= 25°C
V
REF
= 3.5V
AD8038 AMPLIFIER
C
COMP
= 1.8pF
AD5443
V
DD
3V, 3.5V REF
NRG = 0.647nVs
0x800 TO 0x7FF
V
DD
5V, 3.5V REF, NRG = 0.364nVs,
0x800 TO 0x7FF
V
DD
3V, 3.5V REF
NRG = 1.433nVs
0x7FF TO 0x800
V
DD
5V, 3.5V REF
NRG = 1.184nVs
0x7FF TO 0x800
Figure 29. Midscale Transition VREF = 3.5 V