Datasheet

Data Sheet ADA4940-1/ADA4940-2
Rev. C | Page 15 of 32
–
20
–130
0.01
0.1
110
SPURIOUS-FREE DYNAMIC RANGE (dBc)
FREQUENCY (MHz)
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
08452-030
V
OUT, dm
= 2V p-p
LFCSP: R
L
= 1k
LFCSP: R
L
= 200
SOIC: R
L
= 1k
SOIC: R
L
= 200
Figure 31. Spurious-Free Dynamic Range vs. Frequency at
R
L
= 200 Ω and R
L
= 1kΩ
–
20
–150
–2.5 2.5
HARMONIC DISTORTION (dBc)
V
OCM
(V)
–140
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–2.0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 2.0
V
OUT, dm
= 2V p-p
HD2 AT 1MHz
HD2 AT 100kHz
HD3 AT 1MHz
HD3 AT 100kHz
08452-025
Figure 32. Harmonic Distortion vs. V
OCM
for 100 kHz and 1 MHz,
±2.5 V Supplies (LFCSP)
–
20
–130
0.01 0.1 1 10
HARMONIC DISTORTION (dBc)
FREQUENCY (MHz)
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
HD3 AT V
OUT, dm
= 8V p-p
HD2 AT V
OUT, dm
= 8V p-p
HD2 AT V
OUT, dm
= 4V p-p
HD2 AT V
OUT, dm
= 2V p-p
HD3 AT V
OUT, dm
= 2V p-p
08452-026
HD3 AT V
OUT, dm
= 4V p-p
Figure 33. Harmonic Distortion vs. Frequency for Various V
OUT, dm
(LFCSP)
–140
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–
20
012345678910
HARMONIC DISTORTION (dBc)
V
OUT, dm
(V p-p)
V
S
= ±1.5V HD3
V
S
= +3V, 0V HD3
V
S
= +3V, 0V HD2
V
S
= ±3.5V HD3
V
S
= ±2.5V HD3
V
S
= ±3.5V HD2
V
S
= ±1.5V HD2
f = 1MHz
08452-027
V
S
= ±2.5V HD2
Figure 34. Harmonic Distortion vs. V
OUT, dm
for Various Supplies, f = 1 MHz
(LFCSP)
–
20
–140
03.02.5
HARMONIC DISTORTION (dBc)
V
OCM
(V)
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
0.5 1.0 1.5 2.0
+V
S
= +3V, –V
S
= 0V
V
OUT, dm
= 2V p-p
HD2 AT 1MHz
HD3 AT 1MHz
HD3 AT 100kHz
HD2 AT 100kHz
08452-028
Figure 35. Harmonic Distortion vs. V
OCM
for 100 kHz and 1 MHz, 3 V Supply
(LFCSP)
–
20
–140
0.01 0.1 1 10
HARMONIC DISTORTION (dBc)
FREQUENCY (MHz)
–120
–130
–110
–100
–90
–80
–70
–60
–50
–40
–30
V
OUT, dm
= 2V p-p
08452-029
HD3, R
F
= R
G
= 499
HD2, R
F
= R
G
= 499
HD3, R
F
= R
G
= 1k
HD2, R
F
= R
G
= 1k
Figure 36. Harmonic Distortion vs. Frequency for Various R
F
and R
G
(LFCSP)