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INA240-Q1 AEC-Q100, –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection
SBOS808E
August 2016 – December 2021
INA240-Q1
PRODUCTION DATA
CONTENTS
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INA240-Q1 AEC-Q100, –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection
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
Amplifier Input Signal
8.3.1.1
Enhanced PWM Rejection Operation
8.3.1.2
Input Signal Bandwidth
8.3.2
Selecting the Sense Resistor (RSENSE)
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
8.4.2.1
Ground Referenced Output
8.4.2.2
VS Referenced Output
8.4.3
Reference Pin Connections for Bidirectional Current Measurements
8.4.3.1
Output Set to External Reference Voltage
8.4.3.2
Output Set to Midsupply Voltage
8.4.3.3
Output Set to Mid-External Reference
8.4.3.4
Output Set Using Resistor Divider
8.4.4
Calculating Total Error
8.4.4.1
Error Sources
8.4.4.2
Reference Voltage Rejection Ratio Error
8.4.4.2.1
Total Error Example 1
8.4.4.2.2
Total Error Example 2
9
Application and Implementation
9.1
Application Information
9.1.1
Input Filtering
9.2
Typical Applications
9.2.1
Inline Motor Current-Sense Application
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.3
Application Curve
9.2.2
Solenoid Drive Current-Sense Application
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.3
Application Curve
9.3
What to Do and What Not to Do
9.3.1
High-Precision Applications
9.3.2
Kelvin Connection from the Current-Sense Resistor
10
Power Supply Recommendations
10.1
Power Supply Decoupling
11
Layout
11.1
Layout Guidelines
11.1.1
Connection to the Current-Sense Resistor
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
D|8
MSOI002K
PW|8
MPDS568
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbos808e_oa
sbos808e_pm
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DATA SHEET
INA240-Q1 AEC-Q100, –4-V to 80-V, Bidirectional, Ultra-Precise Current Sense Amplifier With Enhanced PWM Rejection
1
Features
AEC-Q100 Qualified for Automotive Applications
Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
Temperature Grade 0: –40°C to +150°C Ambient Operating Temperature Range
HBM ESD Classification Level H2
CDM ESD Classification Level C5
Functional Safety-Capable
Documentation available to aid functional safety system design
Enhanced PWM Rejection
Excellent CMRR:
132-dB DC CMRR
93-dB AC CMRR at 50 kHz
Wide Common-Mode Range: –4 V to 80 V
Accuracy:
Gain Error: 0.20% (Maximum) With 2.5 ppm/°C (Maximum Drift)
Offset Voltage: ±25 μV (Maximum) With 250 nV/°C (Maximum Drift)
Available Gains:
INA240A1-Q1: 20 V/V
INA240A2-Q1: 50 V/V
INA240A3-Q1: 100 V/V
INA240A4-Q1: 200 V/V