Datasheet

AD5425 Data Sheet
Rev. C | Page 10 of 24
Figure 16. Supply Current vs. Input Voltage
Figure 17. Threshold Voltages vs. Supply Voltage
Figure 18. Reference Multiplying Bandwidth—All 1s Loaded
Figure 19. Midscale Transition, V
REF
= 3.5 V
Figure 20. Reference Multiplying Bandwidth vs. Frequency and Code
Figure 21. Reference Multiplying Bandwidth vs. Frequency and
Compensation Capacitor
03161-016
INPUT VOLTAGE (V)
50 1 2 3 4
CURRENT (mA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
DD
= 3V
V
DD
= 2.5V
V
DD
= 5V
T
A
= 25°C
03161-017
VOLTAGE (V)
5.52.5 3.0 3.5 4.0 4.5 5.0
THRESHOLD VOLTAGE (V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
T
A
= 25°C
V
IL
V
IH
03161-018
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
AD8083 AMPLIFIER
03161-019
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
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
07xFF TO 0x800
03161-020
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
T
A
= 25°C
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
INPUT
C
COMP
= 1.8pF
AD8083 AMPLIFIER
03161-021
FREQUENCY (Hz)
100M10k 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