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INA254 80-V, High-Voltage, ±75-A Integrated Precision Shunt, Bidirectional, Zero-Drift Current-Shunt Monitor
SLOS974A
June 2021 – March 2023
INA254
PRODUCTION DATA
CONTENTS
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INA254 80-V, High-Voltage, ±75-A Integrated Precision Shunt, Bidirectional, Zero-Drift Current-Shunt Monitor
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Integrated Shunt Resistor
8.3.2
Short-Circuit Duration
8.3.3
Temperature Stability
8.3.4
Enhanced PWM Rejection Operation
8.3.5
Input Signal Bandwidth
8.4
Device Functional Modes
8.4.1
Adjusting the Output Midpoint With the Reference Pins
8.4.2
Reference Pin Connections for Unidirectional Current Measurements
8.4.3
Ground Referenced Output
8.4.4
Reference Pin Connections for Bidirectional Current Measurements
8.4.4.1
Output Set to External Reference Voltage
8.4.5
Output Set to Mid-Supply Voltage
8.4.6
Output Set to Mid-External Reference
8.4.7
Output Set Using Resistor Divider
9
Application and Implementation
9.1
Application Information
9.1.1
Input Filtering
9.2
Typical Applications
9.2.1
Speaker Enhancements and Diagnostics Using Current Sense Amplifier
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.3
Application Curve
9.3
Power Supply Recommendations
9.4
Layout
9.4.1
Layout Guidelines
9.4.2
Layout Example
10
Device and Documentation Support
10.1
Device Support
10.1.1
Development Support
10.2
Documentation Support
10.2.1
Related Documentation
10.3
Receiving Notification of Documentation Updates
10.4
Support Resources
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
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DATA SHEET
INA254 80-V, High-Voltage, ±75-A Integrated Precision Shunt, Bidirectional, Zero-Drift Current-Shunt Monitor
1
Features
Precision integrated 400-µΩ shunt resistor
Continuous ±75 A at 25°C
Continuous ±50 A from –40°C to +85°C
Shunt resistor tolerance: 0.5% (maximum)
Low drift: 10 ppm/°C (0°C to 125°C)
Low inductance: 2 nH
High accuracy
System gain error: 0.5% (maximum)
System gain drift: 45 ppm/°C (maximum)
Input offset current: ±62.5 mA (maximum)
Input offset drift: 625 µA/°C (maximum)
DC CMRR > 120-dB
90-dB AC CMRR at 50 kHz
Enhanced PWM rejection
Wide common-mode range: –4 V to +80 V
Available gains: 20 mV/A, 40 mV/A,
and 75 mV/A
2
Applications
48-V motor controls
DC/DC converters
Medical cordless tools
Solenoid and actuators
Remote I/O link control
