AD8067 Analog Devices, AD8067 Datasheet - Page 21

• Manufacturer Part Number: AD8067
• Manufacturer: Analog Devices

Specifications of AD8067

• Vcc-vee: 5V to 24V
• Isy Per Amplifier: 7mA
• Packages: SOT
• -3db Bandwidth: 54MHz
• Slew Rate: 640V/µs
• Vos: 200µV
• Ib: 0.6pA
• # Opamps Per Pkg: 1
• Input Noise (nv/rthz): 6.6nV/rtHz

The composite amplifier is set for a gain of 100. The overall gain
is set by
The output stage is set for a gain of 10; therefore, the AD8067
has an effective gain of 10, thereby allowing it to maintain a
bandwidth in excess of 55 MHz.
The circuit can be tailored for different gain values; keeping the
ratios roughly the same ensures that the bandwidth integrity is
maintained. Depending on the board layout, Capacitor C5 can
be required to reduce ringing on the output. The gain bandwidth
and pulse responses are shown in Figure 58, Figure 59, and
Figure 60.
Layout of this circuit requires attention to the routing and
length of the feedback path. It should be kept as short as
possible to minimize stray capacitance.
Figure 57. AD8067/AD8009 Composite Amplifier A
51.1Ω
INPUT
R1
V
V
O
I
=
4
3
AD8067
R2
R1
+5V
–5V
+
5
2
1
0.1μF
10μF
C4
C3
1
4.99kΩ
0.1μF
10μF
R2
C1
C2
C5
5pF
R3
21.5Ω
10μF
10μF
C9
C7
2
3
AD8009
+5V
–5V
7
4
200Ω
R4
V
= 100, GBWP = 6.1 GHz
6
0.001μF
0.001μF
0.01μF
0.1μF
C10
C11
C8
C6
50Ω
R5
OUTPUT
Rev. A | Page 21 of 24
44
42
40
38
36
34
32
30
28
26
24
0.1
CH1
CH1
1V
200mV
Figure 58. Gain Bandwidth Response
Figure 59. Large Signal Response
Figure 60. Small Signal Response
T
T
1
FREQUENCY – MHz
M 25ns CH1 0V
M 25ns CH1 0V
10
C1 AMPL
4V
C1 AMPL
480mV
AD8067
100