Datasheet

−30
−27
−24
−21
−18
−15
−12
−9
−6
−3
0
3
10 100 500
LNA INPUT HPF CHARACTERISTICS
Frequency (KHz)
Amplitude (dB)
01
00
11
10
−30
−25
−20
−15
−10
−5
0
5
0 10 20 30 40 50 60
Frequency (MHz)
Amplitude (dB)
10MHz
15MHz
20MHz
30MHz
0
50
100
150
200
250
300
350
400
450
500
500k 4.5M 8.5M 12.5M 16.5M 20.5M
Impedance Magnitude Response
Frequency (Hz)
Impedance (Ohms)
50 Ohms
100 Ohms
200 Ohms
400 Ohms
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
10
500k 4.5M 8.5M 12.5M 16.5M 20.5M
Impedance Phase Response
Frequency (Hz)
Phase (Degrees)
50 Ohms
100 Ohms
200 Ohms
400 Ohms
2000
4000
6000
8000
10000
12000
500k 4.5M 8.5M 12.5M 16.5M 20.5M
Impedance Magnitude Response
Frequency (Hz)
Impedance (Ohms)
Open
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
10
500k 4.5M 8.5M 12.5M 16.5M 20.5M
Impedance Phase Response
Frequency (Hz)
Phase (Degrees)
Open
AFE5808A
www.ti.com SLOS729B –OCTOBER 2011–REVISED APRIL 2012
TYPICAL CHARACTERISTICS (continued)
Figure 8. Input Impedance without Active Termination Figure 9. Input Impedance without Active Termination
(Magnitude) (Phase)
Figure 10. Input Impedance with Active Termination Figure 11. Input Impedance with Active Termination (Phase)
(Magnitude)
Figure 12. Low-Pass Filter Response Figure 13. LNA High-Pass Filter Response vs. Reg59[3:2]
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