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AMC1306E25

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±250-mV input, precision current sensing reinforced isolated modulator with Manchester code

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Data sheet

AMC1306E25

ACTIVE
Data sheet Order now

Product details

Device type Current sensing Peak-to-peak input voltage range (V) 250mV Interface type Serial CMOS Sample rate (max) (Msps) 21 Rating Catalog CMTI (min) (kV/µs) 50 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 82 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 45 SFDR (dB) 83 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5
Device type Current sensing Peak-to-peak input voltage range (V) 250mV Interface type Serial CMOS Sample rate (max) (Msps) 21 Rating Catalog CMTI (min) (kV/µs) 50 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 82 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 45 SFDR (dB) 83 Isolation rating Reinforced Withstand isolation voltage (VISO) (Vrms) 5000 Working isolation voltage (VIOWM) (Vrms) 1500 Transient isolation voltage (VIOTM) (VPK) 7 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5
SOIC (DWV) 8 67.275 mm² 5.85 x 11.5
  • Pin-compatible family optimized for shunt-resistor-based current measurements:
    • ±50-mV or ±250-mV input voltage ranges
    • Manchester coded or uncoded bitstream options
  • Excellent DC performance:
    • Offset error: ±50 µV or ±100 µV (max)
    • Offset drift: 1 µV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±40 ppm/°C (max)
  • Transient immunity: 100 kV/µs (typ)
  • System-level diagnostic features
  • Safety-related certifications:
    • 7000-VPEAK reinforced isolation per DIN VDE V 0884-11: 2017-01
    • 5000-VRMS isolation for 1 minute per UL1577
    • CAN/CSA no. 5A-component acceptance service notice and IEC 62368-1 end equipment standard
  • Fully specified over the extended industrial temperature range: –40°C to +125°C
  • Pin-compatible family optimized for shunt-resistor-based current measurements:
    • ±50-mV or ±250-mV input voltage ranges
    • Manchester coded or uncoded bitstream options
  • Excellent DC performance:
    • Offset error: ±50 µV or ±100 µV (max)
    • Offset drift: 1 µV/°C (max)
    • Gain error: ±0.2% (max)
    • Gain drift: ±40 ppm/°C (max)
  • Transient immunity: 100 kV/µs (typ)
  • System-level diagnostic features
  • Safety-related certifications:
    • 7000-VPEAK reinforced isolation per DIN VDE V 0884-11: 2017-01
    • 5000-VRMS isolation for 1 minute per UL1577
    • CAN/CSA no. 5A-component acceptance service notice and IEC 62368-1 end equipment standard
  • Fully specified over the extended industrial temperature range: –40°C to +125°C

The AMC1306 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 7000 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 input of the AMC1306 is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The unique low input voltage range of the ±50-mV device allows significant reduction of the power dissipation through the shunt and supports excellent ac and dc performance. The output bitstream of the AMC1306 is Manchester coded (AMC1306Ex) or uncoded (AMC1306Mx), depending on the derivate. By using an integrated digital filter (such as those in the TMS320F2807x or TMS320F2837x microcontroller families) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS.

The bitstream output of the Manchester coded AMC1306Ex versions support single-wire data and clock transfer without having to consider the setup and hold time requirements of the receiving device.

The AMC1306 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 7000 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 input of the AMC1306 is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The unique low input voltage range of the ±50-mV device allows significant reduction of the power dissipation through the shunt and supports excellent ac and dc performance. The output bitstream of the AMC1306 is Manchester coded (AMC1306Ex) or uncoded (AMC1306Mx), depending on the derivate. By using an integrated digital filter (such as those in the TMS320F2807x or TMS320F2837x microcontroller families) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS.

The bitstream output of the Manchester coded AMC1306Ex versions support single-wire data and clock transfer without having to consider the setup and hold time requirements of the receiving device.
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Technical documentation

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Type Title Date
* Data sheet AMC1306x Small, High-Precision, Reinforced Isolated Delta-Sigma Modulators With High CMTI datasheet (Rev. C) PDF | HTML 16 Jan 2020
Application note Shunt Resistor Selection for Isolated Data Converters PDF | HTML 04 May 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023
Certificate UL Certificate of Compliance Vol4 Sec5 E181974 (Rev. A) 23 Jan 2023
Certificate VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. R) 12 Jul 2022
Certificate TUEV Technical Report No. 713203936 20 Oct 2021
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) 28 Feb 2019
Technical article Get cerTIfied, not certi-FRIED! Electromagnetic compatibility testing explained (Part 4) 06 Feb 2015
Technical article Using delta-sigma modulators for isolated high-voltage measurements 09 Jan 2015
Technical article Part III: Get CerTIfied, not certi-FRIED! Electromagnetic compatibility testing explained 02 Dec 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

AMC1306EVM — AMC1306 small reinforced isolated modulator evaluation module

The AMC1306 devices are 1-bit modulators with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO2) isolation barrier. The isolation barrier provides galvanic isolation of up to 8000 VPEAK. When used in combination with an FPGA or other digital filter, AMC1306 (...)
User guide: PDF
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Simulation model

AMC1306M25 IBIS Model (Rev. A)

SBAM315A.ZIP (35 KB) - IBIS Model
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Calculation tool

Delta Sigma Modulator Filter Calculator

SBAR010.ZIP (3354 KB)
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Reference designs

TIDA-00914 — Reinforced Isolated Phase Current Sense Reference Design with Small Delta Sigma Modulators

This reference design realizes a reinforced isolated 3-phase inverter sub-system using isolated IGBT gate drivers and isolated current/voltage sensors. Precise in-line shunt based motor phase current sensing is done with AMC1306E25 delta sigma modulators. The modulator output is Manchester-encoded (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01420 — Basic Isolated Three-Phase Compact Power Stage Reference Design for Industrial Drives

This three-phase, compact power stage reference design for industrial drives, which uses a UCC53xx gate driver to support basic capacitive isolation requirements, provides an increased lifespan and better propagation delay match over optocouplers to minimize inverter deadband distortions and (...)
Design guide: PDF
Schematic: PDF
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SOIC (DWV) 8 View options
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