AD8018
16
18
V
S
= 8.00
15
16
V
S
= 5.00
14
V
S
= 5.25
P
LINE
– dBm
14
P
LINE
– dBm
13
V
S
= 5.00
V
S
= 4.75
12
12
V
S
= 4.50
10
V
S
= 4.75
11
8
V
S
= 3.33
10
3.0
3.2
3.4
3.8
4.0
4.2
4.4
3.6
TRANSFORMER TURNS RATIO
4.6
4.8
6
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
TRANSFORMER TURNS RATIO
4.6
4.8
TPC 19. Line Power vs. Turns Ratio; MTPR = –65 dBc,
f = 43 kHz
TPC 22. Line Power vs. Turns Ratio; –75 dBc Out-of-Band
SFDR, f = 361 kHz
–20
V
S
= 5V
R
LINE
= 100
f = 93kHz
10M
1M
100k
PHASE
200
150
100
–30
TRANSIMPEDANCE –
–50
–60
P = 13dBm
P = 13.5dBm
P = 14dBm
P = 12.5dBm
P = 12dBm
1k
100
10
1
TRANSIMPEDANCE
0
–50
–100
–150
–200
–70
0.1
–80
3
4
TRANSFORMER TURNS RATIO – N
5
0.01
1k
10k
100k
1M
10M
FREQUENCY – Hz
100M
1G
TPC 20. MTPR vs. Turns Ratio
TPC 23. Open Loop Transimpedance and Phase
–30
V
S
= 5V
R
LINE
= 100
f = 361kHz
20
LOGIC 1 TO 0
18
DECREASING
16
14
INCREASING
12
–50
SFDR – dBc
–60
P = 12.5dBm
P = 13dBm
P = 13.5dBm
P = 14dBm
–70
TOTAL SUPPLY CURRENT – mA
–40
10
LOGIC 0 TO 1
8
–80
P = 12dBm
3
4
TRANSFORMER TURNS RATIO – N
5
–90
6
0.86
0.88
0.90
0.92
0.94
0.96
0.98
POWER-DOWN VOLTAGE – Volts
1.00
1.02
TPC 21. Out-of-Band SFDR vs. Turns Ratio for Various
Line Power
TPC 24. Power-Up/-Down Threshold Voltage
REV. 0
–7–
PHASE – Degrees
–40
MTPR – dBc
10k
50
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