ADA4310-1ACPZ-R7 Analog Devices Inc, ADA4310-1ACPZ-R7 Datasheet - Page 10

• Manufacturer Part Number: ADA4310-1ACPZ-R7
• Description: IC,Operational Amplifier,DUAL,BIPOLAR,LLCC,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of ADA4310-1ACPZ-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: 16-LFCSP
• 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
• Other names: ADA4310-1ACPZ-R7TR

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