1 Features

• Wide high-side supply range: 3 V to 27 V

• Low-side supply range: 2.7 V to 5.5 V

• Adjustable threshold: 20 mV to 2.7 V

• Reference current for threshold adjustment:

– 100 μA, ±1

• Trip threshold error: ±1 (max) at 250 mV

• Open-drain output with optional latch mode

• Propagation delay: 240 ns (typ)

• High CMTI: 75 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

2 Applications

• Overcurrent or overvoltage detection in:

– Motor drives

– Frequency inverters

– Solar inverters

– DC/DC converters

3 Description

The AMC22C11 is an isolated 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 trip threshold is adjustable from 20 mV to 450 mV

in low-hysteresis mode and from 600 mV to 2.7 V

in high-hysteresis mode through a single external

resistor.

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 AMC22C11 is available in an 8-pin SOIC

package and is specified over the extended industrial

temperature range of –40°C to +125°C.