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AMC1304L05

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±50-mV input, precision current sensing reinforced isolated modulator with LDO & LVDS interface

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Data sheet

AMC1304L05

ACTIVE
Data sheet Order now

Product details

Device type Current sensing Input range (Vp-p) 50mV Interface type LVDS Sample rate (Max) (MSPS) 20 Rating Catalog Isolation (kV peak) 7 CMTI (Min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 77 Operating temperature range (C) -40 to 125 INL (Max) (+/-LSB) 4 Power consumption (Typ) (mW) 58
Device type Current sensing Input range (Vp-p) 50mV Interface type LVDS Sample rate (Max) (MSPS) 20 Rating Catalog Isolation (kV peak) 7 CMTI (Min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 77 Operating temperature range (C) -40 to 125 INL (Max) (+/-LSB) 4 Power consumption (Typ) (mW) 58
SOIC (DW) 16 77 mm² 10.3 x 7.5
  • Pin-compatible family optimized for shunt-resistor-based current measurements:
    • ±50-mV or ±250-mV input voltage ranges
    • CMOS or LVDS digital interface options
  • Excellent DC performance supporting high-precision sensing on system level:
    • Offset error: ±50 µV or ±100 µV (max)
    • Offset drift: 1.3 µV/°C (max)
    • Gain error: ±0.2% or ±0.3% (max)
    • Gain drift: ±40 ppm/°C (max)
  • Safety-related certifications:
    • 7000-VPK 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
  • Transient immunity: 15 kV/µs (min)
  • High electromagnetic field immunity
    (see application note SLLA181A)
  • External 5-MHz to 20-MHz clock input for
    easier system-level synchronization
  • On-chip 18-V LDO regulator
  • Fully specified over the extended industrial temperature range
  • Pin-compatible family optimized for shunt-resistor-based current measurements:
    • ±50-mV or ±250-mV input voltage ranges
    • CMOS or LVDS digital interface options
  • Excellent DC performance supporting high-precision sensing on system level:
    • Offset error: ±50 µV or ±100 µV (max)
    • Offset drift: 1.3 µV/°C (max)
    • Gain error: ±0.2% or ±0.3% (max)
    • Gain drift: ±40 ppm/°C (max)
  • Safety-related certifications:
    • 7000-VPK 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
  • Transient immunity: 15 kV/µs (min)
  • High electromagnetic field immunity
    (see application note SLLA181A)
  • External 5-MHz to 20-MHz clock input for
    easier system-level synchronization
  • On-chip 18-V LDO regulator
  • Fully specified over the extended industrial temperature range

The AMC1304 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, UL1577 and CSA standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local system ground and interfering with or damaging low voltage circuitry.

The input of the AMC1304 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 while supporting excellent ac and dc performance. By using an appropriate digital filter (that is, as integrated on the TMS320F2807x or TMS320F2837x families) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 81 dB (13.2 ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied by an integrated low-dropout (LDO) regulator that allows an unregulated input voltage between 4 V and 18 V (LDOIN). The isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).

The AMC1304 is available in a wide-body SOIC-16 (DW) package and is specified from –40°C to +125°C.

The AMC1304 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, UL1577 and CSA standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local system ground and interfering with or damaging low voltage circuitry.

The input of the AMC1304 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 while supporting excellent ac and dc performance. By using an appropriate digital filter (that is, as integrated on the TMS320F2807x or TMS320F2837x families) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 81 dB (13.2 ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied by an integrated low-dropout (LDO) regulator that allows an unregulated input voltage between 4 V and 18 V (LDOIN). The isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).

The AMC1304 is available in a wide-body SOIC-16 (DW) package and is specified from –40°C to +125°C.
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Technical documentation

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Type Title Date
* Data sheet AMC1304x High-Precision, Reinforced Isolated Delta-Sigma Modulators with LDO datasheet (Rev. F) PDF | HTML 06 Jan 2020
Certificate VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. R) 12 Jul 2022
EVM User's guide AMC1304EVM User's Guide (Rev. A) PDF | HTML 05 Jul 2022
Certificate UL Certificate of Compliance Vol4 Sec5 E181974 24 May 2022
Application note Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 28 Sep 2021
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) 28 Feb 2019
Application note Digital Filter Types in Delta-Sigma ADCs PDF | HTML 27 Jun 2017
White paper High Voltage Isolation Quality and Reliability for AMC130x 21 Jun 2016
Technical article Ditching the current transformer – Part 3: How to use shunt sensors in poly-phase metrology systems 30 Sep 2015
Technical article Ditching the current transformer – Part 2: Overcoming the disadvantages of using shunt current sensors 10 Sep 2015
Application note How to Optimize Performance of AMC1304/05M05 in Voltage Sensing 31 Aug 2015
Technical article Six ways to sense current and how to decide which to use 10 Jul 2015
Technical article Simple solutions for supplying your isolated delta-sigma modulator 01 May 2015

Design & development

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

Evaluation board

AMC1304L05EVM — AMC1304L05 Evaluation Module

The AMC1304L05 is an isolated single-channel delta-sigma (ΔΣ) modulator used in high-resolution measurement applications including current monitoring, industrial process control and motor positioning systems. The AMC1304L05EVM is a small form factor board containing all the necessary components to (...)

User guide: PDF | HTML
Not available on TI.com
Daughter card

TMDSCNCD28379D — F28379D controlCARD for C2000 Real time control development kits

TMDSCNCD28379D is an HSEC180 controlCARD based evaluation and development tool for the F2837xD,  F2837xS, and F2807x series in the TI MCU. controlCARDs are ideal to use for initial evaluation and system prototyping. controlCARDs are complete board-level modules that utilize one of two standard (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

AMC1305L25 IBIS Model (Rev. A)

SLAM225A.ZIP (15 KB) - IBIS Model
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Calculation tool

Delta Sigma Modulator Filter Calculator

SBAR010.ZIP (3354 KB)
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Package Pins Download
SOIC (DW) 16 View options

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