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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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Type Title 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. W) 31 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
White paper Comparing isolated amplifiers and isolated modulators (Rev. A) 28 Feb 2019
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 (...)

User guide: PDF
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Calculation tool

SBAR010 — Delta Sigma Modulator Filter Calculator

Supported products & hardware

Supported products & hardware

Products
Isolated ADCs
AMC1106E05 — Small Basic Isolated Delta-Sigma Modulator With ±50mV Input and Manchester-Encoded CMOS Interface AMC1106M05 — ±50-mV input, precision current sensing basic isolated modulator AMC1203 — ±250-mV input, precision current sensing basic isolated modulator with int clock AMC1204 — ±250-mV input, precision current sensing basic isolated modulator AMC1204-Q1 — Automotive, ±250-mV input, precision current sensing basic isolated modulator AMC1210 — 4-channel digital filter for delta-sigma modulators AMC1303E0510 — ±50-mV input, current sensing reinforced isolated modulator with 10-MHz int clock & Manchester code AMC1303E0520 — ±50-mV input, current sensing reinforced isolated modulator with 20-MHz int clock & Manchester code AMC1303E2510 — ±250-mV input, current sensing reinforced isolated modulator with 10-MHz int clock & Manchester code AMC1303E2520 — ±250-mV input, current sensing reinforced isolated modulator with 20-MHz int clock & Manchester code AMC1303M0510 — ±50-mV input, precision current sensing reinforced isolated modulator with 10-MHz int clock AMC1303M0520 — ±50-mV input, precision current sensing reinforced isolated modulator with 20-MHz int clock AMC1303M2510 — ±250-mV input, precision current sensing reinforced isolated modulator with 10-MHz int clock AMC1303M2520 — ±250-mV input, precision current sensing reinforced isolated modulator with 20-MHz int clock AMC1304L05 — ±50-mV input, precision current sensing reinforced isolated modulator with LDO & LVDS interface AMC1304L05-Q1 — Automotive, ±50-mV input, current sensing reinforced isolated modulator with LDO & LVDS interface AMC1304L25 — ±250-mV input, precision current sensing reinforced isolated modulator with LDO & LVDS Interface AMC1304L25-Q1 — Automotive, ±250-mV input, current sensing reinforced isolated modulator with LDO & LVDS Interface AMC1304M05 — ±50-mV input, precision current sensing reinforced isolated modulator with LDO AMC1304M05-Q1 — Automotive, ±50-mV input, precision current sensing reinforced isolated modulator with LDO AMC1304M25 — ±250-mV input, precision current sensing reinforced isolated modulator with LDO AMC1304M25-Q1 — Automotive, ±250-mV input, precision current sensing reinforced isolated modulator with LDO AMC1305L25 — ±250-mV input, precision current sensing reinforced isolated modulator with LVDS interface AMC1305L25-Q1 — Automotive, ±250-mV input, current sensing reinforced isolated modulator with LVDS Interface AMC1305M05 — ±50-mV input, precision current sensing reinforced isolated modulator AMC1305M05-Q1 — Automotive, ±50-mV input, precision current sensing reinforced isolated modulator AMC1305M25 — ±250-mV input, precision current sensing reinforced isolated modulator AMC1305M25-Q1 — Automotive, ±250-mV input, precision current sensing reinforced isolated modulator AMC1306E05 — ±50-mV input, precision current sensing reinforced isolated modulator with Manchester code AMC1306E25 — ±250-mV input, precision current sensing reinforced isolated modulator with Manchester code AMC1306M05 — ±50-mV input, precision current sensing reinforced isolated modulator AMC1306M25 — ±250-mV input, precision current sensing reinforced isolated modulator AMC1336 — ±1-V input, precision voltage sensing reinforced isolated modulator AMC1336-Q1 — Automotive, ±1-V input, precision voltage sensing reinforced isolated delta-sigma modulator AMC3306M05 — ±50-mV input, precision current sensing reinforced isolated modulator with integrated DC/DC AMC3306M25 — ±250-mV input, precision current sensing reinforced isolated modulator with integrated DC/DC AMC3336 — ±1-V input, precision voltage sensing reinforced isolated modulator with integrated DC/DC AMC3336-Q1 — Automotive ±1-V input, precision voltage sensing reinforced isolated modulator with integrated DC/DC
Precision ADCs
ADS1201 — High Dynamic Range Delta-Sigma Modulator ADS1202 — Current-shunt delta-sigma modulator, 10MHz CLK, +/-250mV input, 16-bit resolution ADS1203 — Current-shunt delta-sigma modulator, 10MHz CLK, +/-250mV input, 16-bit resolution, ext ref option ADS1204 — Four Delta-Sigma Modulators, 10MHz CLK, 0-5V Input, 16-Bit Resolution ADS1205 — Two 1-Bit, 10MHz, 2nd-Order, Delta-Sigma Modulator ADS1208 — 10MHz Modulator With Built-in Current Excitation for Hall Sensors ADS1209 — 16-Bit, 10MHz, 2-Ch, Delta-Sigma Modulator AMC1035 — Precision delta-sigma modulator with ±1-V bipolar input and 2.5-V reference output AMC1035-Q1 — Automotive precision delta-sigma modulator with ±1-V bipolar input and 2.5-V reference output
Hardware development
Evaluation board
AMC1304L25EVM — AMC1304L25 Evaluation Module
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Package Pins Download
SOIC (DW) 16 View options
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