Datasheet

AD8336
Rev. C | Page 11 of 28
OUTPUT RESISTANCE (Ω)
0.1
1
100
1k
10
FREQUENCY (Hz)
1M 500M100M10M
0.01
100k
V
S
= ±12V
V
S
= ±5V
V
S
= ±3V
06228-027
Figure 27. Output Resistance vs. Frequency of the VGA
for Three Values of Supply Voltage (V
S
)
(See Figure 61)
OUTPUT-REFERRED NOISE (nV/
√Hz
)
1000
900
800
700
600
500
400
300
200
0
100
–800
V
GAIN
(mV)
–600 –200–400 400 600200 800
0
T = +125°C
T = +85°C
T = +25°C
T = –40°C
T = –55°C
f= 5MHz
06228-028
Figure 28. Output-Referred Noise vs. V
GAIN
at Various Temperatures (T)
(See Figure 62)
0–800
V
GAIN
(mV)
–600 –200–400 400 600200 800
OUTPUT-REFERRED NOISE (nV/
√Hz
)
3000
2700
2400
2100
1800
1500
1200
900
600
300
0
f = 5MHz
PREAMP GAIN = 20×
T = +125°C
T = +85°C
T = +25°C
T = –40°C
T = –55°C
06228-029
0–800
V
GAIN
(mV)
–600 –200–400 400 600200 800
INPUT-REFERRED NOISE (nV/√Hz)
1k
100
10
1
f = 5MHz
PREAMP GAIN = 4×
PREAMP GAIN = 20×
0
6228-030
INPUT-REFERRED NOISE (nV/
√Hz
)
Figure 29. Output-Referred Noise vs. V
GAIN
at Various Temperatures (T)
When the Preamp Gain is 20×
(See Figure 62)
Figure 30. Input-Referred Noise vs. V
GAIN
for Preamp Gains of 4× and 20×
(See Figure 62)
2
3
5
6
100k
4
FREQUENCY (Hz)
1M 100M10M
0
1
V
GAIN
= 0.7V
V
S
= ±12V
V
S
= ±5V
V
S
= ±3V
06228-031
Figure 31. Short-Circuit Input-Referred Noise vs. Frequency at Maximum Gain
for Three Values of Supply Voltage (V
S
)
(See Figure 62)
2
3
5
6
100k
4
1M 100M10M
INPUT-REFERRED NOISE (nV/
√Hz)
0
1
V
GAIN
= 0.7V
PREAMP GAIN = –3×
FREQUENCY (Hz)
06228-032
Figure 32. Short-Circuit Input-Referred Noise vs. Frequency
at Maximum Inverting Gain
(See Figure 73)