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  • AMC1336 Small, High-Precision, Reinforced Isolated Delta-Sigma Modulator for Voltage Sensing Applications

    • SBAS951B August   2019  – April 2020 AMC1336

      PRODUCTION DATA.  

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  • AMC1336 Small, High-Precision, Reinforced Isolated Delta-Sigma Modulator for Voltage Sensing Applications
  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. Table 1.  Absolute Maximum Ratings
    2. Table 2.  ESD Ratings
    3. Table 3.  Recommended Operating Conditions
    4. Table 4.  Thermal Information
    5. Table 5.  Power Ratings
    6. Table 6.  Insulation Specifications
    7. Table 7.  Safety-Related Certifications
    8. Table 8.  Safety Limiting Values
    9. Table 9.  Electrical Characteristics
    10. Table 10. Switching Characteristics
    11. 6.1       Insulation Characteristics Curves
    12. 6.2       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 Modulator
      3. 7.3.3 Isolation Channel Signal Transmission
      4. 7.3.4 Clock Input
      5. 7.3.5 Digital Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Output Behavior in Case of a Full-Scale Input
      2. 7.4.2 AVDD Diagnostics and Fail-Safe Output
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Digital Filter Usage
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
      4. 8.2.4 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 Device Support
      1. 11.1.1 Device Nomenclature
        1. 11.1.1.1 Isolation Glossary
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE
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DATA SHEET

AMC1336 Small, High-Precision, Reinforced Isolated Delta-Sigma Modulator for Voltage Sensing Applications

1 Features

  • Input structure optimized for voltage measurements:
    • Input voltage range: ±1 V
    • Input resistance: 1.5 GΩ (typ)
  • Excellent DC performance:
    • Offset error: ±0.5 mV (max)
    • Offset drift: ±4 µV/°C (max)
    • Gain error: ±0.25% (max)
    • Gain drift: ±40 ppm/°C (max)
  • Transient immunity: 115 kV/µs (typ)
  • Missing high-side supply detection
  • Safety-related certifications:
    • 8000-VPEAK reinforced isolation per DIN VDE V 0884-11: 2017-01
    • 5700-VRMS isolation for 1 minute per UL1577
    • IEC 62368-1 end equipment standard

2 Applications

  • Isolated AC and DC voltage measurement in:
    • Uninterruptible power supplies
    • Photovoltaic inverters
    • Motor drives

3 Description

The AMC1336 is a precision, delta-sigma (ΔΣ) modulator with the output separated from the input circuitry by a capacitive double isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced isolation of up to 8000 VPEAK according to the DIN VDE V 0884-11 and UL1577 standards. Used in conjunction with isolated power supplies, this isolated modulator separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The unique wide, bipolar. ±1-V input voltage range of the AMC1336 and its high input resistance support direct connection of the device to resistive dividers in high-voltage applications. When used with a digital filter (for instance, as integrated in the TMS320F28004x, TMS320F2807x or TMS320F2837x microcontroller families) to decimate the output bitstream, the device can achieve 16 bits of resolution with a dynamic range of 87 dB at a data rate of 82 kSPS.

On the high-side, the AMC1336 is supplied by a
3.3-V or 5-V power supply. The isolated digital interface operates from a 3.0-V, 3.3-V or 5-V power supply.

The AMC1336 performance is specified over the extended industrial temperature range of –40°C to +125°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
AMC1336 SOIC (8) 5.85 mm × 7.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Device Images

Simplified Schematic

AMC1336 frontpage_bas951.gif

4 Revision History

Changes from A Revision (December 2019) to B Revision

  • Changed PD (AVDD = DVDD = 5.5 V) from 88 mW to 90.75 mW.Go
  • Changed PD1 (AVDD = 5.5 V) from 55 mW to 57.75 mWGo
  • Added UL certification file number.Go

Changes from * Revision (August 2019) to A Revision

  • Changed document status from advance information to production dataGo

5 Pin Configuration and Functions

DWV Package
8-Pin SOIC
Top View

Pin Functions

PIN I/O DESCRIPTION
NO. NAME
1 AVDD — Analog (high-side) power supply, 3.0 V to 5.5 V.
See the Power Supply Recommendations section for decoupling recommendations.
2 AINP I Noninverting analog input
3 AINN I Inverting analog input
4 AGND — Analog (high-side) ground reference
5 DGND — Digital (controller-side) ground reference
6 DOUT O Modulator bitstream output, updated with the rising edge of the clock signal present on CLKIN. Use the rising edge of the clock to latch the modulator bitstream at the input of the digital filter device.
7 CLKIN I Modulator clock input with internal pulldown resistor (typical value: 1 MΩ). The clock signal must be applied continuously for proper device operation; see the Clock Input section for additional details.
8 DVDD — Digital (controller-side) power supply, 2.7 V to 5.5 V.
See the Power Supply Recommendations section for decoupling recommendations.

6 Specifications

Table 1. Absolute Maximum Ratings

see(1)
MIN MAX UNIT
Power-supply voltage AVDD to AGND –0.3 6.5 V
DVDD to DGND –0.3 6.5
Analog input voltage On the AINP and AINN pins AGND – 5 AVDD + 0.5 V
Digital input voltage On the CLKIN pin DGND – 0.5 DVDD + 0.5 V
Digital output voltage On the DOUT pin DGND – 0.5 DVDD + 0.5 V
Input current Continuous, any pin except power-supply pins –10 10 mA
Temperature Junction, TJ 150 °C
Storage, Tstg –65 150
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Table 3. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Table 2. ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

 
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