Datasheet

AD8400/AD8402/AD8403
Rev. E | Page 17 of 32
FREQUENCY (Hz)
X
NORMALIZED GAIN FLATNESS (0.1dB/DIV)
10 10k 1M100k100 1k
R=10kΩ
R = 100kΩ
R=50kΩ
CODE = 80
H
V
DD
=5V
T
A
=25°C
01092-027
Figure 27. Normalized Gain Flatness vs. Frequency
(See Figure 43)
DIGITAL INPUT VOLTAGE (V)
I
DD
– SUPPLY CURRENT (mA)
10
1
0.01
0.1
T
A
=25°C
V
DD
=5V
V
DD
=3V
01234
01092-028
5
Figure 28. Supply Current vs. Digital Input Voltage
FREQUENCY (Hz)
PSRR (dB)
80
0
100 1M1k 10k 100k
60
40
20
V
DD
=+5VDC ± 1V p-p AC
T
A
=25 ° C
CODE = 80
H
C
L
= 10pF
V
A
=4V,V
B
=0V
01092-029
Figure 29. Power Supply Rejection Ratio vs. Frequency
(See Figure 40)
FREQUENCY (Hz)
GAIN (dB)
0
–6
1k 10k 1M
–30
–36
–42
–12
–24
–18
100k
6
12



V
IN
= 100mV rms
V
DD
=5V
R
L
=1M Ω
f
–3dB
= 700kHz, R = 10k Ω
f
–3dB
= 71kHz, R = 100k Ω
f
–3dB
= 125kHz, R = 50k Ω
01092-030
Figure 30. −3 dB Bandwidths
FREQUENCY (Hz)
I
DD
– SUPPLY CURRENT
(
μ
A)
1k 1M 10M10k 100k
1200
1000
800
600
400
200
0
A
B
C
D
A: V
DD
=5.5V
CODE = 55
H
B: V
DD
=3.3V
CODE = 55
H
C: V
DD
=5.5V
CODE = FF
H
D: V
DD
=3.3V
CODE = FF
H
01092-031
T
A
=25 ° C
Figure 31. Supply Current vs. Clock Frequency
V
BIAS
(V)
R
ON
(
Ω)
160
0
140
80
60
40
20
120
100
0123456
T
A
=25 ° C
V
DD
=2.7V
V
DD
=5.5V
01092-032
Figure 32. AD8403 Incremental Wiper On Resistance vs. V
DD
(See Figure 39)