• Menu
  • Product
  • Email
  • PDF
  • Order now

  • AMC1311x-Q1 Automotive, High-Impedance, 2-V Input, Reinforced Isolated Amplifiers

    • SBAS897C March   2018  – June 2022 AMC1311-Q1

      PRODUCTION DATA  

  • CONTENTS
  • SEARCH
  • AMC1311x-Q1 Automotive, High-Impedance, 2-V Input, Reinforced Isolated Amplifiers
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Switching Characteristics
    11. 6.11 Timing Diagram
    12. 6.12 Insulation Characteristics Curves
    13. 6.13 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Analog Input
      2. 7.3.2 Isolation Channel Signal Transmission
      3. 7.3.3 Analog Output
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Filter Design
        2. 8.2.2.2 Differential to Single-Ended Output Conversion
      3. 8.2.3 Application Curve
    3. 8.3 What To Do and What Not To Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

AMC1311x-Q1 Automotive, High-Impedance, 2-V Input, Reinforced Isolated Amplifiers

1 Features

  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • 2-V, high-impedance input voltage range optimized for isolated voltage measurement
  • Fixed gain: 1
  • Low DC errors:
    • AMC1311-Q1:
      • Offset error: ±9.9 mV (maximum)
      • Offset drift: ±20 µV/°C (typical)
      • Gain error: ±1% (maximum)
      • Gain drift: ±30 ppm/°C (typical)
    • AMC1311B-Q1:
      • Offset error: ±1.5 mV (maximum)
      • Offset drift: ±10 µV/°C (maximum)
      • Gain error: ±0.2% (maximum)
      • Gain drift: ±40 ppm/°C (maximum)
    • Nonlinearity: 0.04% (maximum)
  • 3.3-V operation on high-side (AMC1311B-Q1)
  • High CMTI: 100 kV/μs (AMC1311B-Q1)
  • Missing high-side supply indication
  • Safety-related certifications:
    • 7000-VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5000-VRMS isolation for 1 minute per UL1577

2 Applications

  • Isolated voltage sensing in:
    • Traction inverters
    • Onboard chargers
    • DC/DC converters

3 Description

The AMC1311-Q1 is a precision, isolated amplifier with an output separated from the input circuitry by a capacitive isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 5 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 and supports a working voltage of up to 1500 VRMS.

The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from voltages that can cause electrical damage or be harmful to an operator.

The high-impedance input of the AMC1311-Q1 is optimized for connection to high-impedance resistive dividers or any other high-impedance voltage signal source. The excellent DC accuracy and low temperature drift support accurate, isolated voltage sensing and control in closed-loop systems. The integrated missing high-side supply voltage detection feature simplifies system-level design and diagnostics.

The AMC1311-Q1 is offered with two performance grade options: AMC1311-Q1 and AMC1311B-Q1.

Device Information(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
AMC1311-Q1 SOIC (8) 5.85 mm × 7.50 mm
AMC1311B-Q1
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic

4 Revision History

Changes from Revision B (May 2020) to Revision C (June 2022)

  • Changed Features sectionGo
  • Changed isolation standard from DIN VDE V 0884-11 (VDE V 0884-11) to DIN EN IEC 60747-17 (VDE 0884-17) and updated the Insulation Specifications and Safety-Related Certifications tables accordinglyGo
  • Changed Description sectionGo
  • Changed pin names: VIN to IN, VOUTP to OUTP, and VOUTN to OUTNGo
  • Merged VOS specs for 4.5V ≤ VDD1 ≤ 5.5 V and 3.0 V ≤ VDD1 ≤ 5.5 V ranges (AMC1311B-Q1 only)Go
  • Changed VDD1 DC PSRR from –65 dB (typical) to –80 dB (typical)Go
  • Changed CMTI from 75 kV/µs (minimum), 140 kV/µs (typical) to 100 kV/µs (minimum), 150kV/µs (typical) (AMC1311B-Q1 only)Go
  • Changed VDD1UV (VDD1 falling) from 1.75 V / 2.53 V / 2.7 V to 2.4 V / 2.6 V / 2.8 V (minimum / typical / maximum)Go
  • Changed Rise, Fall, and Delay Time Definition timing diagramGo
  • Changed Reinforced Isolation Capacitor Lifetime Projection figure Go
  • Deleted histogram plots from Typical Characteristics sectionGo
  • Changed Overview sectionGo
  • Changed functional block diagramGo
  • Changed the Analog Input sectionGo
  • Changed Isolation Channel Signal Transmission sectionGo
  • Deleted Fail-Safe Output section, added Analog Output sectionGo
  • Changed Application Information section for clarityGo
  • Changed Typical Application section and subsectionsGo
  • Changed Design Requirements tableGo
  • Changed Detailed Design Procedure sectionGo
  • Added Input Filter Design sectionGo
  • Added Differential to Single-Ended Output Conversion sectionGo
  • Changed Step Response of the AMC1311B-Q1 figureGo
  • Changed Application Curve sectionGo
  • Changed What To Do and What Not To Do sectionGo
  • Changed Power Supply Recommendations sectionGo
  • Changed Layout sectionGo
  • Changed Layout Guidelines sectionGo
  • Changed recommended layout drawingGo

Changes from Revision A (June 2018) to Revision B (May 2020)

  • Changed automotive-specific Features bullets Go
  • Added Functional Safety-Capable bullets to Features list. Go
  • Changed AMC1311B-Q1 offset drift from ±15 µV/°C (max) to 10 µV/°C (max) in Features sectionGo
  • Changed AMC1311B-Q1 gain error from ±0.3% (max) to ±0.2% (max) and changed AMC1311B-Q1 gain drift from ±45 ppm/°C (max) to ±40 ppm/°C (max) in Features sectionGo
  • Changed AMC1311B-Q1 values for TCVOS, EG, and TCEG in Device Comparison Table Go
  • Added ESD classification levels to ESD Ratings tableGo
  • Changed CLR and CPG values from 9 mm to 8.5 mmGo
  • Changed Insulation Specifications table per ISO standardGo
  • Changed Safety-Related Certification table per ISO standardGo
  • Changed Safety Limiting Values description as per ISO standardGo
  • Changed TCVOS parameter minimum value from –15 μV/°C to –10 μV/°C and maximum value from 15 μV/°C to 10μV/°C for the AMC1311B-Q1 in the Electrical Characteristics tableGo
  • Changed EG parameter minimum value from –0.3% to –0.2% and maximum value from 0.3% to 0.2% for the AMC1311B-Q1 in the Electrical Characteristics tableGo
  • Changed TCEG parameter minimum value from –45 ppm/°C to –40 ppm/°C and maximum value from 45 ppm/°C to 40 ppm/°C for the AMC1311B-Q1 in the Electrical Characteristics tableGo
  • Changed Step Response of the AMC1311B-Q1 figureGo
  • Changed Step Response of the AMC1311-Q1 figureGo

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale