ADA4310-1ARHZ-R7 Analog Devices Inc, ADA4310-1ARHZ-R7 Datasheet - Page 10
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ADA4310-1ARHZ-R7
Manufacturer Part Number
ADA4310-1ARHZ-R7
Description
IC,Operational Amplifier,DUAL,BIPOLAR,TSSOP,10PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet
1.ADA4310-1ACPZ-R7.pdf
(16 pages)
Specifications of ADA4310-1ARHZ-R7
Amplifier Type
Current Feedback
Number Of Circuits
2
Slew Rate
820 V/µs
-3db Bandwidth
190MHz
Current - Input Bias
6µA
Voltage - Input Offset
1000µV
Current - Supply
7.6mA
Voltage - Supply, Single/dual (±)
5 V ~ 12 V, ±2.5 V ~ 6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Output Type
-
Current - Output / Channel
-
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
ADA4310-1
THEORY OF OPERATION
The ADA4310-1 is a current feedback amplifier with high
output current capability. With a current feedback amplifier, the
current into the inverting input is the feedback signal, and the
open-loop behavior is that of a transimpedance, dV
The open-loop transimpedance is analogous to the open-loop
voltage gain of a voltage feedback amplifier. Figure 20 shows a
simplified model of a current feedback amplifier. Because R
proportional to 1/g
where g
analysis of the follower with gain circuit yields
where:
G
R
IN
= 1
=
V
V
+
IN
g
O
1
m
R
R
m
G
is the transconductance of the input stage. Basic
F
=
≈
G
50
×
Ω
T
Z
( )
m
s
, the equivalent voltage gain is just T
+
T
G
Z
×
( )
s
R
IN
+
R
F
O
/dI
IN
Z
or T
× g
IN
Rev. 0 | Page 10 of 16
m
is
Z
,
.
Because G × R
amplifier has relatively constant bandwidth vs. gain, the 3 dB
point being set when |T
Of course, for a real amplifier there are additional poles that
contribute excess phase, and there is a value for R
the amplifier is unstable. Tolerance for peaking and desired
flatness determines the optimum R
V
IN
IN
R
R
G
N
<< R
Figure 20. Simplified Block Diagram
F
for low gains, a current feedback
Z
| = R
I
R
F
IN
.
IN
R
T
F
Z
F
in each application.
F
V
OUT
below which