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INA159 Datasheet(PDF) 18 Page - Texas Instruments

Part # INA159
Description  INA826 Precision, 200-μA Supply Current, 3-V to 36-V Supply Instrumentation Amplifier With Rail-to-Rail Output
PDF  51 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

INA159 Datasheet(HTML) 18 Page - Texas Instruments

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background image
A
1
A
2
A
3
7
50 kW
50 kW
50 kW
50 kW
8
5
4
3
2
1
-IN
+IN
R
G
V+
V-
Device
G = 1 +
49.4 kW
R
G
6
RFI Filter
24.7 kW
24.7 kW
RFI Filter
Load
V = G
(V
´
V
)
-
O
IN+
IN-
0.1 F
m
0.1 F
m
+
-
V
O
R
G
Also drawn in simplified form:
Device
REF
V
O
-IN
+IN
REF
R
(1)
S
R
(1)
S
Copyright © 2016, Texas Instruments Incorporated
18
INA826
SBOS562G – AUGUST 2011 – REVISED JUNE 2020
www.ti.com
Product Folder Links: INA826
Submit Documentation Feedback
Copyright © 2011–2020, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
The Functional Block Diagram section shows the basic connections required for operation of the INA826. Good
layout practice mandates the use of bypass capacitors placed as close to the device pins as possible.
The output of the INA826 is referred to the output reference (REF) terminal, which is normally grounded. This
connection must be low-impedance to maintain good common-mode rejection. Although 5
Ω or less of stray
resistance can be tolerated when maintaining specified CMRR, small stray resistances of tens of ohms in series
with the REF pin can cause noticeable degradation in CMRR.
8.2 Functional Block Diagram
(1)
This resistor is optional if the input voltage stays above [(V–) – 2 V] or if the signal source current drive capability is
limited to less than 3.5 mA; see the Input Protection section for more details.



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