AD8065 AD8066 Analog Devices, AD8065 AD8066 Datasheet - Page 21

• Manufacturer Part Number: AD8065 AD8066
• Description: High Performance, 145 MHz Fast FET Op Amps
• Manufacturer: Analog Devices

Contributor
RF ( 2)
Amp to f
Amp (f
Amp (past f
Integrating the square of the output voltage noise spectral density
over frequency and then taking the square root allows users to
obtain the total rms output noise of the preamp. Table I summarizes
REV. B
2
–f
V
V
1
N
1
P
)
2
)
R
R
S2
S1
R
G
R
AD8066
AD8066
F
= 500
1 / 2
1 / 2
Table I. RMS Noise Contributions of Photodiode Preamp
ven
ven
ven
V
V
V
V
CC
CC
EE
EE
2 4
Figure 10. High Speed Instrumentation Amplifier
R
0.1 F
0.1 F
0.1 F
F
0.1 F
¥
¥
¥
¥
= 500
(
(
kT
f
1
C
C
S
S
¥
Expression
+
+
R
C
C
Total
F
M
M
4.7 F
4.7 F
4.7 F
4.7 F
¥
C
+
C
+
f
2
F
F
C
C
¥
F
D
1 57
+
+
.
2
–21–
2
C
C
500
500
D
R
R
F
1
3
approximations for the amplifier and feedback and source resis-
tances. Noise components for an example preamp with R
C
also listed.
)
)
S
¥
¥
= 15 pF, and C
500
R
4
f
f
2
3
–
¥
f
1
1 57
.
F
AD8065
2.2pF
= 2 pF (bandwidth of about 1.6 MHz) are
V
V EE
2.2pF
500
CC
R 2
0.1 F
0.1 F
270 mV
RMS Noise with R
C
64.5 mV
2.4 mV
31 mV
260 mV
AD8065/AD8066
S
= 15 pF, C
4.7 F
4.7 F
F
= 2 pF
V
O
F
F
= 50 kW,
= 50 kW,