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AMC1305L25-Q1

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Automotive, ±250-mV input, current sensing reinforced isolated modulator with LVDS Interface

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Data sheet

AMC1305L25-Q1

ACTIVE
Data sheet Order now

Product details

Device type Current sensing Peak-to-peak input voltage range (V) 250mV Interface type Serial LVDS Sample rate (max) (Msps) 20 Rating Automotive CMTI (min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 85 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 36.1 SFDR (dB) 92 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 LVDS Sample rate (max) (Msps) 20 Rating Automotive CMTI (min) (kV/µs) 15 Number of input channels 1 Architecture Delta-Sigma SNR (dB) 85 Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 36.1 SFDR (dB) 92 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 (DW) 16 106.09 mm² 10.3 x 10.3
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Temperature Grade 1: –40°C to +125°C
    • HBM ESD Classification Level 2
    • CDM ESD Classification Level C6
  • Pin-Compatible Family With:
    • ±50-mV or ±250-mV Input Voltage Ranges
    • CMOS or LVDS Digital Interface Options
  • Excellent DC Performance:
    • Offset Error: ±50 µV or ±150 µV (max)
    • Offset Drift: 1.3 µV/°C (max)
    • Gain Error: ±0.3% (max)
    • Gain Drift: ±40 ppm/°C (max)
  • Safety-Related Certifications:
    • 7000-VPK Reinforced Isolation per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
    • 5000-VRMS Isolation for 1 Minute per UL1577
    • CAN/CSA No. 5A-Component Acceptance Service Notice
  • Transient Immunity: 15 kV/µs (min)
  • High Electromagnetic Field Immunity
    (see Application Note SLLA181A)
  • External 5-MHz to 20-MHz Clock Input
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Temperature Grade 1: –40°C to +125°C
    • HBM ESD Classification Level 2
    • CDM ESD Classification Level C6
  • Pin-Compatible Family With:
    • ±50-mV or ±250-mV Input Voltage Ranges
    • CMOS or LVDS Digital Interface Options
  • Excellent DC Performance:
    • Offset Error: ±50 µV or ±150 µV (max)
    • Offset Drift: 1.3 µV/°C (max)
    • Gain Error: ±0.3% (max)
    • Gain Drift: ±40 ppm/°C (max)
  • Safety-Related Certifications:
    • 7000-VPK Reinforced Isolation per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
    • 5000-VRMS Isolation for 1 Minute per UL1577
    • CAN/CSA No. 5A-Component Acceptance Service Notice
  • Transient Immunity: 15 kV/µs (min)
  • High Electromagnetic Field Immunity
    (see Application Note SLLA181A)
  • External 5-MHz to 20-MHz Clock Input

The AMC1305-Q1 device 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 V VDE V 0884-10, 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 AMC1305-Q1 is optimized for direct connection to shunt resistors or other low voltage level signal sources and supports excellent dc and ac performance. Shunt resistors are typically used to sense currents in traction inverters, onboard chargers, or other such automotive applications. By using an appropriate digital filter (that is, as integrated on the TMS320F2837x) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB (13.8 ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied with a nominal voltage of 5 V (AVDD), whereas the isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).

The AMC1305-Q1 is available in a wide-body SOIC-16 (DW) package.

The AMC1305-Q1 device 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 V VDE V 0884-10, 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 AMC1305-Q1 is optimized for direct connection to shunt resistors or other low voltage level signal sources and supports excellent dc and ac performance. Shunt resistors are typically used to sense currents in traction inverters, onboard chargers, or other such automotive applications. By using an appropriate digital filter (that is, as integrated on the TMS320F2837x) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB (13.8 ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied with a nominal voltage of 5 V (AVDD), whereas the isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).

The AMC1305-Q1 is available in a wide-body SOIC-16 (DW) package.
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Technical documentation

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Type Title Date
* Data sheet AMC1305x-Q1 High-Precision, Reinforced Isolated Delta-Sigma Modulators datasheet PDF | HTML 09 Feb 2017
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
Application note Comparing shunt- and hall-based isolated current-sensing solutions in HEV/EV (Rev. C) PDF | HTML 28 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
White paper Comparing shunt- and Hall-based current-sensing solutions in onboard chargers an (Rev. A) 19 Mar 2019
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

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Evaluation board

AMC1305L25EVM — AMC1305L25 Evaluation Module

The AMC1305L25 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 AMC1305L25EVM is a small form factor board containing all the necessary components to (...)

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