AD8391
RG
RF
VIN+
VMID
CMID
RG
RF
VIN–
VOUT–
RL
VOUT+
TPC 19. Differential Output Test Setup
–30
VS = ؎6V
–40 RL = 21⍀
G = –5, (RG = 178⍀)
–50
–60 HD2 (FO = 500kHz)
–70
HD3 (FO = 500kHz)
–80
–90
HD2 (FO = 100kHz)
–100
HD3 (FO = 100kHz)
–110
2
6
10
14
18
22
OUTPUT VOLTAGE – V p-p
TPC 20. Differential Distortion vs. Output Voltage
–25
VS = ؎6V
RLINE = 100⍀
–35
–45
13dBm
13.5dBm 14dBm
–55
–65
–75
12.5dBm 12dBm
–85
1.7
1.8
1.9
2.0
2.1
2.2
2.3
TRANSFORMER TURNS RATIO
TPC 21. MTPR vs. Transformer Turns Ratio
–30
RL = 21⍀
–40 FOR VS = ؎6V, VOUT = 8V p-p
FOR VS = ؎1.5V, VOUT = 2V p-p
–50 G = –5
–60
HD2 @VS = ؎1.5V
–70
HD2 @ VS = ؎6V
–80
–90
–100
–110
0.01
HD3 @VS = ؎1.5V
HD3 @VS = ؎6V
0.1
1
10
FREQUENCY – MHz
TPC 22. Differential Distortion vs. Frequency
–30
VS = ؎1.5V
–40 RL = 21⍀
G = –5, (RG = 178⍀)
–50
–60 HD2 (FO = 500kHz)
–70
HD3 (FO = 500kHz)
–80
–90
HD2 (FO = 100kHz)
–100
HD3 (FO = 100kHz)
–110
0
1
2
3
4
5
6
OUTPUT VOLTAGE – V p-p
TPC 23. Differential Distortion vs. Output Voltage
–50
VS = ؎6V
RLINE = 100⍀
–55
–60
13dBm
–65
13.5dBm 14dBm
–70
–75
12.5dBm 12dBm
–80
1.7
1.8
1.9
2.0
2.1
2.2
2.3
TRANSFORMER TURNS RATIO
TPC 24. SFDR vs. Transformer Turns Ratio
–8–
REV. 0