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AMC22C12

ACTIVE

Fast-response isolated window comparator with adjustable threshold and latch function

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Data sheet

AMC22C12

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Output type Open-drain Propagation delay time (µs) 0.24 CMTI (min) (kV/µs) 55 Rating Catalog Operating temperature range (°C) -40 to 125 Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 3000 Transient isolation voltage (VIOTM) (VPK) 4250 Working isolation voltage (VIOWM) (Vrms) 560 Creepage (min) (mm) 4 Clearance (min) (mm) 4
Number of channels 1 Output type Open-drain Propagation delay time (µs) 0.24 CMTI (min) (kV/µs) 55 Rating Catalog Operating temperature range (°C) -40 to 125 Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 3000 Transient isolation voltage (VIOTM) (VPK) 4250 Working isolation voltage (VIOWM) (Vrms) 560 Creepage (min) (mm) 4 Clearance (min) (mm) 4
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Wide high-side supply range: 3 V to 27 V
  • Low-side supply range: 2.7 V to 5.5 V
  • Adjustable threshold:
    • Window-comparator mode: ±20 mV to ±300 mV
    • Positive-comparator mode: 600 mV to 2.7 V
  • Reference for threshold adjustment: 100 µA, ±1%
  • Trip threshold error: ±1% (max) at 250 mV
  • Open-drain output with optional latch mode
  • Propagation delay: 280 ns (typ)
  • High CMTI: 55 V/ns (min)
  • Safety-related certifications:
    • 4250-VPK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 3000-VRMS isolation for 1 minute per UL1577
  • Fully specified over the extended industrial temperature range: –40°C to +125°C
  • Wide high-side supply range: 3 V to 27 V
  • Low-side supply range: 2.7 V to 5.5 V
  • Adjustable threshold:
    • Window-comparator mode: ±20 mV to ±300 mV
    • Positive-comparator mode: 600 mV to 2.7 V
  • Reference for threshold adjustment: 100 µA, ±1%
  • Trip threshold error: ±1% (max) at 250 mV
  • Open-drain output with optional latch mode
  • Propagation delay: 280 ns (typ)
  • High CMTI: 55 V/ns (min)
  • Safety-related certifications:
    • 4250-VPK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 3000-VRMS isolation for 1 minute per UL1577
  • Fully specified over the extended industrial temperature range: –40°C to +125°C

The AMC22C12 is an isolated window comparator with a short response time. The open-drain output is separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide galvanic isolation of up to 3 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports a working voltage of up to 560 VRMS.

The comparison window is centered around 0 V, meaning that the comparator trips if the absolute value of the input voltage exceeds the trip threshold value. The trip threshold is adjustable from 20 mV to 300 mV through a single external resistor and, therefore, the comparison window ranges from ±20 mV to ±300 mV. When the voltage on the REF pin is greater than 550 mV, the negative comparator is disabled and only the positive comparator is functional. The reference voltage in this mode can be as high as 2.7 V. This mode is particularly useful for monitoring voltage supplies.

The open-drain output on the device supports transparent mode (LATCH input tied to GND2) where the output follows the input state, or latch mode, where the output is cleared on the falling edge of the latch input signal.

The AMC22C12 is available in a 8-pin SOIC package and is specified over the extended industrial temperature range of –40°C to +125°C.

The AMC22C12 is an isolated window comparator with a short response time. The open-drain output is separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide galvanic isolation of up to 3 kVRMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports a working voltage of up to 560 VRMS.

The comparison window is centered around 0 V, meaning that the comparator trips if the absolute value of the input voltage exceeds the trip threshold value. The trip threshold is adjustable from 20 mV to 300 mV through a single external resistor and, therefore, the comparison window ranges from ±20 mV to ±300 mV. When the voltage on the REF pin is greater than 550 mV, the negative comparator is disabled and only the positive comparator is functional. The reference voltage in this mode can be as high as 2.7 V. This mode is particularly useful for monitoring voltage supplies.

The open-drain output on the device supports transparent mode (LATCH input tied to GND2) where the output follows the input state, or latch mode, where the output is cleared on the falling edge of the latch input signal.

The AMC22C12 is available in a 8-pin SOIC package and is specified over the extended industrial temperature range of –40°C to +125°C.
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* Data sheet AMC22C12 Fast Response, Basic Isolated Window ComparatorWith Adjustable Threshold and Latch Function datasheet (Rev. A) PDF | HTML 03 Aug 2022
Application note Design Considerations for Current Sensing in DC EV Charging Applications PDF | HTML 13 Dec 2022
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 1 (Rev. A) 05 Aug 2022
Analog Design Journal Using isolated comparators for fault detection in electric motor drives PDF | HTML 14 Mar 2022

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Evaluation board

AMC23C12EVM — AMC23C12 evaluation module for fast-response, reinforced, isolated window comparator

The AMC23C12 evaluation module (EVM) is an platform for evaluating the AMC23C12, which is an isolated window comparator with short response time and latch function. The comparator outputs are separated from the input circuitry by an isolation barrier that is certified to provide (...)

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