AD8066ARZ-R7 Analog Devices Inc, AD8066ARZ-R7 Datasheet - Page 25

• Manufacturer Part Number: AD8066ARZ-R7
• Description: IC,Operational Amplifier,DUAL,BIPOLAR/JFET,SOP,8PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: FastFET™r

Specifications of AD8066ARZ-R7

• Design Resources: Precision, Bipolar Configuration for the AD5426/32/43 8-Bit to12-Bit DACs (CN0036) Precision, Bipolar, Configuration for AD5450/1/2/3 8-14bit Multiplying DACs (CN0053)
• Amplifier Type: Voltage Feedback
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 180 V/µs
• -3db Bandwidth: 145MHz
• Current - Input Bias: 3pA
• Voltage - Input Offset: 400µV
• Current - Supply: 6.6mA
• Current - Output / Channel: 30mA
• Voltage - Supply, Single/dual (±): 5 V ~ 24 V, ±2.5 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 5. RMS Noise Contributions of Photodiode Preamp
Contributor
R
Amp to f
Amp (f
Amp to (past f
HIGH SPEED JFET INPUT INSTRUMENTATION
AMPLIFIER
Figure 60 shows an example of a high speed instrumentation
amplifier with high input impedance using the
AD8065/AD8066. The dc transfer function is
For G = +1, it is recommended that the feedback resistors for
the two preamps be set to a low value (for instance 50 Ω for
50 Ω source impedance). The bandwidth for G = +1 is 50 MHz.
For higher gains, the bandwidth is set by the preamp, equaling
F
(×2)
V
Inamp
2
OUT
– f
1
1
)
=
−
3dB
(
V
2
)
N
=
−
(
V
f
CR
P
V
V
Expression
VEN ×
VEN
VEN
N
P
)
×
⎛
⎜
⎜
⎝
2
1
R
×
R
+
G
R
S2
S1
4
×
×
) (
1000
/
R
kT
R
2
G
G
C
C
f
×
×
1
S
S
⎞
⎟
⎟
⎠
R
R
+
+
F
F
C
C
)
×
M
M
f
C
C
+
2
+
R
AD8066
F
AD8066
F
×
F
C
2
= 500Ω
1
C
F
1 / 2
1 / 2
.
57
D
V
V
V
+
V
CC
EE
EE
CC
R
+
2
0.1μF
0.1μ F
0.1μF
F
0.1μ F
C
Figure 60. High Speed Instrumentation Amplifier
= 500Ω
C
D
F
×
×
f
f
2
3
4.7μF
4.7μF
4.7μF
4.7μF
−
×
Rev. J | Page 25 of 28
. 1
f
1
57
500Ω
500Ω
R1
R3
Common-mode rejection of the in-amp is primarily
determined by the match of the resistor ratios R1:R2 to R3:R4.
It can be estimated
The summing junction impedance for the preamps is equal to
R
500Ω
R4
F
|| 0.5(R
RMS Noise with R
64.5 μV
2.4 μV
31 μV
260 μV
270 μV (Total)
V
V
CM
O
G
=
). This is the value to be used for matching purposes.
(
(
1
AD8065
2.2pF
δ
+
1
δ
−
V
1
V
2.2pF
500Ω
CC
δ
EE
)
R2
0.1μ F
2
δ
0.1μF
)
2
F
= 50 kΩ, C
4.7μF
4.7μ F
S
= 15 pF, C
AD8065/AD8066
V
O
F
= 2 pF