AD8331 Analog Devices, AD8331 Datasheet - Page 10
![no-image](/images/manufacturer_photos/0/0/56/analog_devices_sml.jpg)
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
AD8331/AD8332
500
400
300
200
100
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
100
0.1
Figure 22. Short-Circuit Input-Referred Noise vs. Frequency
10
100k
0
0
1
0
0
Figure 23. Short-Circuit Input-Referred Noise vs. V
R
HILO = LO OR HI
S
= 0, R
HILO = LO
Figure 21. Output-Referred Noise vs. V
f = 10MHz
FB
0.2
0.2
= ∞, V
HILO = HI
R
HILO = LO OR HI, f = 10MHz
S
GAIN
1M
= 0, R
FREQUENCY (Hz)
0.4
0.4
= 1V
FB
V
V
GAIN
= ∞,
GAIN
(V)
(V)
0.6
0.6
10M
0.8
GAIN
0.8
GAIN
100M
1.0
1.0
Rev. C | Page 10 of 32
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
Figure 24. Short-Circuit Input-Referred Noise vs. Temperature
1.0
0.1
7
6
5
4
3
2
1
0
10
50
–50
1
Figure 26. Noise Figure vs. R
f = 5MHz, R
R
V
SIMULATION
S
GAIN
= 0, R
INCLUDES NOISE OF VGA
–30
Figure 25. Input-Referred Noise vs. R
= 1V, f = 10MHz
FB
100
FB
R
R
= ∞,
S
= ∞ , V
IN
–10
= THERMAL NOISE ALONE
SOURCE RESISTANCE (Ω)
SOURCE RESISTANCE ( Ω )
R
= 50Ω
10
100Ω
200Ω
FB
75Ω
TEMPERATURE (°C)
GAIN
= ∞
10
= 1V
S
for Various Values of R
30
100
50
S
70
IN
1k
1k
90