Datasheet
AD8331/AD8332/AD8334
Rev. G | Page 14 of 56
03199-019
35
SAMPLE SIZE = 100
0.2V < V
GAIN
< 0.7V
0
5
10
15
20
25
30
49.6 50.550.450.350.250.150.049.949.849.7
% TOTAL
GAIN SCALING FACTOR
Figure 19. Gain Scaling Factor Histogram
03199-020
100
10
1
0.1
100k 100M10M1M
OUTPUT IMPEDANCE ()
FREQUENCY (Hz)
SINGLE ENDED, PIN VOH OR PIN VOL
R
L
=
Figure 20. Output Impedance vs. Frequency
03199-021
10k
1k
100
10
100k 100M10M1M
INPUT IMPEDANCE ()
FREQUENCY (Hz)
R
IZ
= 6.65k, C
SH
= 0pF
R
IZ
= 3.01k, C
SH
= 0pF
R
IZ
= 1.1k, C
SH
= 1.2pF
R
IZ
= 549, C
SH
= 8.2pF
R
IZ
= 412, C
SH
= 12pF
R
IZ
= 270, C
SH
= 22pF
R
IZ
= , C
SH
= 0pF
Figure 21. LNA Input Impedance vs.
Frequency for Various Values of R
IZ
and C
SH
R
IN
= 50,
R
IZ
= 270
R
IN
= 75,
R
IZ
= 412
R
IN
= 100,
R
IZ
= 549
R
IN
= 200,
R
IZ
= 1.1k
R
IN
= 6k,
R
IZ
=
0 17
100j
50j
–50j
–100j
25j
–25j
f
= 100kHz
03199-022
Figure 22. Smith Chart, S11 vs. Frequency,
0.1 MHz to 200 MHz for Various Values of R
IZ
20
15
10
5
0
–15
–10
–5
100k 1M 10M 100M 500M
GAIN (dB)
FREQUENCY (Hz)
03199-023
V
IN
= 10mV p-p
R
IN
= 50
R
IN
= 75
R
IN
= 100
R
IN
= 200
R
IN
= 500
R
IN
= 1k
Figure 23. LNA Frequency Response, Single-Ended, for Various Values of R
IN
20
15
10
5
0
–15
–10
–5
100k 1M 10M 100M 500M
GAIN (dB)
FREQUENCY (Hz)
03199-024
R
IZ
=
Figure 24. Frequency Response for Unterminated LNA, Single-Ended