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AMC1204-Q1

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Automotive, ±250-mV input, precision current sensing basic isolated modulator

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Data sheet

AMC1204-Q1

ACTIVE
Data sheet Order now

Product details

Device type Current sensing Peak-to-peak input voltage range (V) 250mV Interface type Serial Sample rate (max) (Msps) 0.078 Rating Automotive CMTI (min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 84 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 88 SFDR (dB) 82 Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 4250 Working isolation voltage (VIOWM) (Vrms) 849 Transient isolation voltage (VIOTM) (VPK) 4.25 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 Sample rate (max) (Msps) 0.078 Rating Automotive CMTI (min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 84 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 88 SFDR (dB) 82 Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 4250 Working isolation voltage (VIOWM) (Vrms) 849 Transient isolation voltage (VIOTM) (VPK) 4.25 Creepage (min) (mm) 8.5 Clearance (min) (mm) 8.5
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • ±250-mV Input Voltage Range Optimized for Shunt Resistors
  • Certified Digital Isolation:
    • CSA, IEC60747-5-2, and UL1577 Approved
    • Isolation Voltage: 4250 VPEAK
    • Working Voltage: 1200 VPEAK
    • Transient Immunity: 15 kV/µs
  • Long Isolation Barrier Lifetime (see Application Report SLLA197)
  • High Electromagnetic Field Immunity
    (see Application Note SLLA181A)
  • Outstanding AC Performance:
    • SNR: 84 dB (min)
    • THD: –80 dB (max)
  • Excellent DC Precision:
    • INL: ±8 LSB (max)
    • Gain Error: ±2.5% (max)
  • External Clock Input for Easier Synchronization
  • Fully Specified Over the Extended Automotive Temperature Range
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • ±250-mV Input Voltage Range Optimized for Shunt Resistors
  • Certified Digital Isolation:
    • CSA, IEC60747-5-2, and UL1577 Approved
    • Isolation Voltage: 4250 VPEAK
    • Working Voltage: 1200 VPEAK
    • Transient Immunity: 15 kV/µs
  • Long Isolation Barrier Lifetime (see Application Report SLLA197)
  • High Electromagnetic Field Immunity
    (see Application Note SLLA181A)
  • Outstanding AC Performance:
    • SNR: 84 dB (min)
    • THD: –80 dB (max)
  • Excellent DC Precision:
    • INL: ±8 LSB (max)
    • Gain Error: ±2.5% (max)
  • External Clock Input for Easier Synchronization
  • Fully Specified Over the Extended Automotive Temperature Range

The AMC1204-Q1 is a 1-bit digital output, isolated delta-sigma (ΔΣ) modulators that can be clocked at up to 20 MHz. The digital isolation of the modulator output is provided by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide basic galvanic isolation of up to 4250 VPEAK according to UL1577, IEC60747-5-2, and CSA standards or specifications.

The AMC1204-Q1 provides a single-chip solution for measuring the small signal of a shunt resistor across an isolated barrier. These types of resistors are typically used to sense currents in motor control inverters, green energy generation systems, and other industrial applications. The AMC1204-Q1 differential inputs easily connect to the shunt resistor or other low-level signal sources. An internal reference eliminates the need for external components. When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 is achieved at a data rate of 78 kSPS.

A 5-V analog supply (AVDD) is used by the modulator while the isolated digital interface operates from a 3-V, 3.3-V, or 5-V supply (DVDD). The AMC1204-Q1 is available in SO-16 (DW) packages and are specified from –40°C to 125°C.

The AMC1204-Q1 is a 1-bit digital output, isolated delta-sigma (ΔΣ) modulators that can be clocked at up to 20 MHz. The digital isolation of the modulator output is provided by a silicon dioxide (SiO2) barrier that is highly resistant to magnetic interference. This barrier has been certified to provide basic galvanic isolation of up to 4250 VPEAK according to UL1577, IEC60747-5-2, and CSA standards or specifications.

The AMC1204-Q1 provides a single-chip solution for measuring the small signal of a shunt resistor across an isolated barrier. These types of resistors are typically used to sense currents in motor control inverters, green energy generation systems, and other industrial applications. The AMC1204-Q1 differential inputs easily connect to the shunt resistor or other low-level signal sources. An internal reference eliminates the need for external components. When used with an appropriate external digital filter, an effective number of bits (ENOB) of 14 is achieved at a data rate of 78 kSPS.

A 5-V analog supply (AVDD) is used by the modulator while the isolated digital interface operates from a 3-V, 3.3-V, or 5-V supply (DVDD). The AMC1204-Q1 is available in SO-16 (DW) packages and are specified from –40°C to 125°C.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet 20 MHz Second-Order Isolated Delta-Sigma Modulator for Current-Shunt Measurement datasheet (Rev. B) 12 Dec 2012
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. Y) 20 Aug 2025
White paper Vergleich isolierter Verstärker und isolierter Modulatoren (Rev. B) PDF | HTML 19 Aug 2024
White paper 절연 증폭기와 절연 모듈레이터 비교 (Rev. B) PDF | HTML 19 Aug 2024
Application brief Shunt-Widerstandsauswahl für isolierte Datenwandler PDF | HTML 15 Aug 2024
Application brief 절연 데이터 컨버터를 위한 션트 레지스터 선택 PDF | HTML 15 Aug 2024
Application brief HEV/EV의 션트 및 홀 기반 절연 전류 감지 솔루션 비교 (Rev. C) PDF | HTML 16 Jul 2024
Application brief Vergleich von isolierten Shunt- und Hall-basierten Strommesslösungen in Hybrid- und Elektrofahrzeugen (Rev. C) PDF | HTML 16 Jul 2024
White paper Comparing Isolated Amplifiers and Isolated Modulators (Rev. B) PDF | HTML 04 Jun 2024
Application note Clock Edge Delay Compensation With Isolated Modulators Digital Interface to MCUs (Rev. A) PDF | HTML 12 Jan 2024
Application brief 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
Application brief Comparing shunt- and hall-based isolated current-sensing solutions in HEV/EV (Rev. C) PDF | HTML 28 Mar 2023
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 1 (Rev. A) 05 Aug 2022
Certificate CSA Certification (Certificate: 220991) (Rev. A) 23 Oct 2015

Design & development

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Evaluation board

AMC1204EVM — AMC1204 evaluation module for 1-bit, 20-MHz, second-order, isolated delta-sigma modulator

The AMC1204 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 AMC1204EVM is a small form factor board containing all the necessary (...)

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