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INA351 Cost and Size Optimized, Low Power, 1.8V to 5.5V Selectable Gain Instrumentation Amplifier with Integrated Reference Buffer
SBOSAD5D
December 2022 – November 2024
INA351
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INA351 Cost and Size Optimized, Low Power, 1.8V to 5.5V Selectable Gain Instrumentation Amplifier with Integrated Reference Buffer
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Gain-Setting
7.3.1.1
Gain Error and Drift
7.3.2
Input Common-Mode Voltage Range
7.3.3
EMI Rejection
7.3.4
Typical Specifications and Distributions
7.3.5
Electrical Overstress
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.1.1
Reference Pin
8.1.2
Input Bias Current Return Path
8.2
Typical Applications
8.2.1
Resistive-Bridge Pressure Sensor
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.1.1.1
PSpice® for TI
9.2
Documentation Support
9.2.1
Related Documentation
9.3
Receiving Notification of Documentation Updates
9.4
Support Resources
9.5
Trademarks
9.6
Electrostatic Discharge Caution
9.7
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DSG|8
MPDS308C
RUG|10
MPQF216A
DDF|8
MPDS569D
Thermal pad, mechanical data (Package|Pins)
DSG|8
QFND141I
RUG|10
QFND221
Orderable Information
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Data Sheet
INA351
Cost and Size Optimized, Low Power, 1.8V to 5.5V Selectable Gain Instrumentation Amplifier with Integrated Reference Buffer
1
Features
Designed for size, cost, and power conscious applications
Selectable gain options with integrated reference buffer
G = 10 or G = 20 (
INA351
ABS)
G = 30 or G = 50 (
INA351
CDS)
Space saving ultra-small package options
10-pin X2QFN (RUG) – 3mm
2
8-pin WSON (DSG) – 4mm
2
8-pin SOT23-THN (DDF) – 4.64mm
2
Optimized performance for 10-bit to 14-bit systems
CMRR: 95dB (typical) across all gains
Offset voltage: 0.2mV (typical) across all gains
Gain error (typical):
0.015% for G = 10, G = 50
0.020% for G = 20, G = 30
Bandwidth: 100kHz for G = 10 (typical)
Drives 500pF with less than 20% overshoot (typical)
Optimized quiescent current: 110µA (typical)
Shutdown option for power conscious applications
Supply range: 1.8V (±0.9V) to 5.5V (±2.75V)
Specified temperature range: –40°C to 125°C
2
Applications
Bridge network sensing
Differential to single-ended conversion
Weigh scale
Analog input module
Flow transmitter
Wearable fitness and activity monitor
Blood glucose monitor
Pressure and temperature sensing
Note: 90kΩ for
INA351
ABS and 145kΩ for
INA351
CDS
Simplified Internal Schematic