AD8034 Analog Devices, AD8034 Datasheet - Page 22

• Manufacturer Part Number: AD8034
• Manufacturer: Analog Devices

Specifications of AD8034

• -3db Bandwidth: 80MHz
• Slew Rate: 80V/µs
• Vos: 1mV
• Ib: 1.5pA
• # Opamps Per Pkg: 2
• Input Noise (nv/rthz): 11nV/rtHz
• Vcc-vee: 5V to 24V
• Isy Per Amplifier: 3.5mA
• Packages: SOIC,SOT

AD8033/AD8034
The output noise over frequency of the preamp is shown in
Figure 63.
The pole in the loop transmission translates to a zero in the
noise gain of the amplifier, leading to an amplification of the
input voltage noise over frequency. The loop transmission zero
introduced by C
noise gain extends past the preamp signal bandwidth and is
eventually rolled off by the decreasing loop gain of the amplifier.
Keeping the input terminal impedances matched is recommended
to eliminate common-mode noise peaking effects that add to
the output noise.
Integrating the square of the output voltage noise spectral density
over frequency and then taking the square root results in the
total rms output noise of the preamp.
F
limits the amplification. The bandwidth of the
Rev. D | Page 22 of 24
VEN
f
1
RF NOISE
Figure 63. Photodiode Voltage Noise Contributions
NOISE DUE TO AMPLIFIER
f
f
f
f
2
1
2
3
=
=
=
2πR
2πR
(C
S
1
+ C
F
F
(C
C
FREQUENCY (Hz)
F
M
F
+ 2C
VEN (C
+ C
f
CR
1
S
D
+ C
+ C
F
M
+ C
F
+ 2C
)/C
S
F
+ C
D
)
M
+ 2C
D
)/C
F
f
3