Typical Performance Characteristics–AD8321
0.6
30
20
f = 10MHz
GAIN ERROR – dB
10
0
71D
OUTPUT NOISE – nV/
Hz
70
f = 10MHz
PD
=1
60
0.3
50
GAIN – dB
0
–10
46D
–0.3
f = 42MHz
40
–0.6
f = 65MHz
–0.9
–1.2
23D
–20
–30
–40
0.1
30
20
00D
10
0
8
16 24 32 40 48 56
GAIN CONTROL – Decimal
64
72
1
10
100
FREQUENCY – MHz
1000
0
8
16 24 32 40 48 56
GAIN CONTROL – Decimal
64
72
Figure 4. Gain Error vs. Gain Control
Figure 5. AC Response
Figure 6. Output Referred Noise vs.
Gain Control
70
PD
= 1
60
–30
f
O
= 65MHz
V
IN
= 0.137V p-p
(P
IN
= –15dBm)
(P
OUT
= 11dBm @
MAX GAIN)
–47
OUTPUT NOISE – nV/
Hz
DISTORTION – dBc
DISTORTION – dBc
MAX GAIN
(71D)
50
–40
P
IN
= –14dBm
(P
OUT
= 12dBm @
MAX GAIN)
P
IN
= –13dBm
(P
OUT
= 13dBm @
MAX GAIN)
P
IN
= –15dBm
(P
OUT
= 11dBm @
MAX GAIN)
–50
–50
HD3
40
–53
–60
HD2
30
MIN GAIN
(00D)
20
10
1
10
FREQUENCY – MHz
100
–56
P
IN
= –17dBm
(P
OUT
= 9dBm @
MAX GAIN)
–70
–80
0
8
16 24 32 40 48 56
GAIN CONTROL – Decimal
64
72
–59
5
15
25
35
45
55
FUNDAMENTAL FREQUENCY – MHz
65
Figure 7. Output Referred Noise vs.
Frequency
Figure 8. Harmonic Distortion vs.
Gain Control
Figure 9. Second Order Harmonic
Distortion vs. Frequency for Various
Input Levels
–47
P
IN
= –13dBm
(P
OUT
= 13dBm @
MAX GAIN)
–50
20
30
DISTORTION – dBc
P
IN
= –14dBm
(P
OUT
= 12dBm @
MAX GAIN)
0
3RD ORDER INTERCEPT – dBm
P
O
= 11dBm
MAX GAIN
29
28
27
26
25
24
23
P
O
= 11dBm
MAX GAIN
P
OUT
– dBm
–20
–53
P
IN
= –15dBm
(P
OUT
= 11dBm @
MAX GAIN)
P
IN
= –17dBm
(P
OUT
= 9dBm @
MAX GAIN)
–59
5
15
25
35
45
55
FUNDAMENTAL FREQUENCY – MHz
65
–40
–56
–60
–80
41.0
41.4
41.8
42.2
42.6
FREQUENCY – MHz
43.0
22
5
15
35
45
25
FREQUENCY – MHz
55
65
Figure 10. Third Order Harmonic
Distortion vs. Frequency for Various
Input Levels
Figure 11. Two-Tone Intermodula-
tion Distortion
Figure 12. Third Order Intercept vs.
Frequency
REV. 0
–5–
AD [ ANALOG DEVICES ]
