Datasheet

REV. B
AD8309
–6–
FREQUENCY – MHz
25
15
1
RSSI SLOPE – mV/dB
24
23
22
21
20
19
18
17
16
10 100 1000
Figure 13. RSSI Slope vs. Frequency Using Termination of
52.3
Ω in Series with 4.7 nH
2ns PER HORIZONTAL DIVISION
LIMITER OUTPUTS 100mV PER VERTICAL DIVISION
2mV PER VERTICAL DIVISION
Figure 14. Limiter Output at 300 MHz for a Sine Wave
Input of –60 dBV (–47 dBm), Using an R
LOAD
of 50 Ω and an
R
LIM
of 100 Ω
12.5ns PER HORIZONTAL
DIVISION
1mV PER VERTICAL DIVISION
LIMITER OUTPUTS
50mV PER VERTICAL DIVISION
INPUT
LMLO
LMHI
Figure 15. Limiter Response at LMHI, LMLO with Pulsed
Sine Input of –70 dBV (–57 dBm) at 50 MHz; R
LOAD
= 50 Ω ,
R
LIM
= 200 Ω
FREQUENCY – MHz
–103
–113
1
RSSI INTERCEPT – dBV
–104
–105
–106
–107
–108
–109
–110
–111
–112
10 100 1000
Figure 16. RSSI Intercept vs. Frequency Using Termina-
tion of 52.3
Ω in Series with 4.7 nH
R
LIM
– V
12
0
CURRENT – mA
10
8
6
4
2
0
100 200 300 400 450
LIMITER OUTPUT CURRENT
ADDITIONAL SUPPLY CURRENT
150 250 35050
14
Figure 17. Additional Supply Current and Limiter Out-
put Current vs. R
LIM
INPUT LEVEL – dBm Re 50V
10
–60
NORMALIZED
LIMITER PHASE RESPONSE – Degrees
8
6
4
2
0
–10
–50 –30 –20 –10 10
–2
–4
–6
–8
–40 0
T
A
= +858C
T
A
= +258C
T
A
= –408C
Figure 18. Normalized Limiter Phase Response vs. Input
Level. Frequency = 100 MHz; T
A
= –40 ° C, +25 ° C and +85 ° C