AD620AR Analog Devices Inc, AD620AR Datasheet - Page 18
AD620AR
Manufacturer Part Number
AD620AR
Description
IC AMP INST LP LN 18MA 8SOIC
Manufacturer
Analog Devices Inc
Datasheet
1.AD620ARZ.pdf
(20 pages)
Specifications of AD620AR
Slew Rate
1.2 V/µs
Rohs Status
RoHS non-compliant
Design Resources
Low Cost Programmable Gain Instrumentation Amplifier Circuit Using ADG1611 and AD620 (CN0146)
Amplifier Type
Instrumentation
Number Of Circuits
1
-3db Bandwidth
1MHz
Current - Input Bias
500pA
Voltage - Input Offset
30µV
Current - Supply
900µA
Current - Output / Channel
18mA
Voltage - Supply, Single/dual (±)
4.6 V ~ 36 V, ±2.3 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
No. Of Amplifiers
1
Bandwidth
120kHz
Supply Current
1.3mA
Amplifier Case Style
SOIC
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Programmable Gain Max
10000
Output Type
-
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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AD620
GROUND RETURNS FOR INPUT BIAS CURRENTS
Input bias currents are those currents necessary to bias the
input transistors of an amplifier. There must be a direct return
path for these currents. Therefore, when amplifying “floating”
input sources, such as transformers or ac-coupled sources, there
must be a dc path from each input to ground, as shown in
Figure 47, Figure 48, and Figure 49. Refer to A Designer’s Guide
to Instrumentation Amplifiers (free from Analog Devices) for
more information regarding in-amp applications.
Figure 47. Ground Returns for Bias Currents with Transformer-Coupled Inputs
+ INPUT
– INPUT
R
G
AD620
–V
+V
S
S
REFERENCE
LOAD
TO POWER
GROUND
SUPPLY
V
OUT
Rev. G | Page 18 of 20
Figure 48. Ground Returns for Bias Currents with Thermocouple Inputs
Figure 49. Ground Returns for Bias Currents with AC-Coupled Inputs
100k Ω
+ INPUT
– INPUT
100k Ω
– INPUT
+ INPUT
R
G
R
G
AD620
AD620
+V
–V
S
–V
S
+V
S
S
REFERENCE
REFERENCE
LOAD
TO POWER
LOAD
GROUND
TO POWER
SUPPLY
GROUND
SUPPLY
V
OUT
V
OUT