AD8331 Analog Devices, AD8331 Datasheet - Page 9
AD8331
Manufacturer Part Number
AD8331
Description
Ultralow Noise VGAs with Preamplifier and Programmable RIN
Manufacturer
Analog Devices
Datasheet
1.AD8331.pdf
(32 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8331ARQZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
100
10k
100
0.1
10
1k
10
35
30
25
20
15
10
100k
100k
1
5
0
R
R
49.6
SINGLE ENDED, PIN VOH OR VOL
R
R
R
SAMPLE SIZE = 100
0.2V < V
FB
FB
R
R
Figure 17. LNA Input Impedance vs. Frequency for
L
FB
FB
FB
FB
= ∞
= 6.65kΩ, C
= 3.01kΩ, C
= 1.1kΩ, C
Figure 16. Output Impedance vs. Frequency
R
= 549Ω, C
= 412Ω, C
= 270Ω, C
Figure 15. Gain Scaling Factor Histogram
49.7 49.8
FB
GAIN
= ∞, C
Various Values of R
< 0.7V
SH
SH
SH
SH
SH
SH
SH
= 1.2pF
= 8.2pF
GAIN SCALING FACTOR
1M
1M
= 0pF
= 0pF
= 0pF
= 12pF
= 22pF
49.9 50.0
FREQUENCY (Hz)
FREQUENCY (Hz)
50.1 50.2 50.3
FB
and C
10M
10M
SH
50.4
50.5
100M
100M
Rev. C | Page 9 of 32
Figure 20. LNA Frequency Response, Unterminated, Single-Ended
–10
–15
–20
Figure 18. Smith Chart, S11 vs. Frequency, 0.1 MHz to 200 MHz
–10
–15
–20
20
15
10
–5
20
15
10
–5
100k
100k
5
0
5
0
0 Ω
R
R
R
IN
FB
FB
= 100 Ω ,
= 549 Ω
R
R
–25j
= ∞
IN
FB
25j
= 75 Ω ,
= 412 Ω
Single-Ended, for Various Values of R
Figure 19. LNA Frequency Response,
R
R
IN
FB
17 Ω
= 200 Ω ,
1M
1M
= 1.1k Ω
for Various Values of R
R
R
IN
FB
= 6k Ω ,
= ∞
FREQUENCY (Hz)
FREQUENCY (Hz)
R
50j
IN
–50j
= 1k
10M
10M
R
Ω
IN
R
R
IN
FB
= 500
= 50 Ω
= 270 Ω
Ω
AD8331/AD8332
,
FB
100M
100j
100M
–100j
R
AND 100
IN
f = 100kHz
IN
= 50
R
R
IN
IN
Ω
= 200
Ω
= 200
, 75
Ω
Ω
Ω
1G
1G
,