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INA821 Datasheet(PDF) 17 Page - Texas Instruments

Part # INA821
Description  PGA848 Low-Noise, Wide-Bandwidth, Scope Gain, Single-Ended Output, Programmable Gain Instrumentation Amplifier
PDF  22 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

INA821 Datasheet(HTML) 17 Page - Texas Instruments

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8.4.2 Layout Example
IN–
4
IN+
1
2
3
DA_IN–
OUT
REF
9
DA_IN+
12
11
10
PAD
R2
GND
IN+
R1
GND
C4
C2
C7
C6
ADC_IN
Use ground pours for
shielding the input
signal pairs
Place bypass
capacitors as close to
IC as possible
R3
C8
Consider using
thermal vias for
heatsinking
Cutouts on ground
planes underneath
input pins can reduce
stray capacitance, for
better phase margin
GND
VS+
R2
R1
C2
PGA848
ADC
IN
REF
OUT
Connect feedback
capacitors between
OUT and DA_IN–
(optional)
A<2:0>
DGND
IN–
A2
A0
C1
GND
LVSS
VS
C5
VS+
LVDD
Optional noise filtering
capacitors
C1
VS
C6
C7
C8
R3
Connect feedback
capacitors between
REF and DA_IN+
(optional)
C4
C5
C9
ADC_REF / 2
GND
C9
ADC_REF / 2
VIN+
VIN
VLVDD
VLVSS
Figure 8-6. Example Schematic and Associated PCB Layout
www.ti.com
PGA848
SBOSAN4 – AUGUST 2025
Copyright © 2025 Texas Instruments Incorporated
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17
Product Folder Links: PGA848



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