AD8620BR-REEL Analog Devices Inc, AD8620BR-REEL Datasheet - Page 21
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AD8620BR-REEL
Manufacturer Part Number
AD8620BR-REEL
Description
IC,Operational Amplifier,DUAL,BIPOLAR/JFET,SOP,8PIN,PLASTIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD8610ARMZ-REEL.pdf
(24 pages)
Specifications of AD8620BR-REEL
Rohs Status
RoHS non-compliant
Design Resources
Using AD7328 in Appls with Single-Ended Industrial-Level Signals (CN0047)
Amplifier Type
J-FET
Number Of Circuits
2
Slew Rate
60 V/µs
Gain Bandwidth Product
25MHz
Current - Input Bias
3pA
Voltage - Input Offset
45µV
Current - Supply
3mA
Current - Output / Channel
45mA
Voltage - Supply, Single/dual (±)
±5 V ~ 13 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Output Type
-
-3db Bandwidth
-
Lead Free Status / RoHS Status
High Speed, Low Noise Differential Driver
The AD8620 is a perfect candidate as a low noise differential
driver for many popular ADCs. There are also other applica-
tions (such as balanced lines) that require differential drivers.
The circuit of Figure 70 is a unique line driver widely used in
industrial applications. With ±13 V supplies, the line driver can
deliver a differential signal of 23 V p-p into a 1 kΩ load. The
high slew rate and wide bandwidth of the AD8620 combine to
yield a full power bandwidth of 145 kHz while the low noise
front end produces a referred-to-input noise voltage spectral
density of 6 nV/√Hz. The design is a balanced transmission system
without transformers, where output common-mode rejection of
noise is of paramount importance. Like the transformer-based
design, either output can be shorted to ground for unbalanced
line driver applications without changing the circuit gain of 1.
This allows the design to be easily set to noninverting, inverting,
or differential operation.
Rev. F | Page 21 of 24
3
2
V+
V–
AD8610
6
1kΩ
1kΩ
R4
R3
Figure 70. Differential Driver
R8
1kΩ
R9
1kΩ
0
3
2
5
6
1kΩ
V+
V+
R1
V–
V–
1/2 AD8620
1/2 AD8620
1kΩ
1
R2
7
U2
U3
AD8610/AD8620
1kΩ
R12
R10
50Ω
R11
50Ω
V
O
2 – V
0
R13
1kΩ
O
1 = V
R5
1kΩ
R6
10kΩ
R7
1kΩ
IN
V
V
O
O
1
2