1 Features
• Wide high-side supply range: 3 V to 27 V
• Low-side supply range: 2.7 V to 5.5 V
• Dual window comparator:
– Window comparator 1: ±20-mV to ±300-mV
adjustable threshold
– Window comparator 2: ±300-mV fixed threshold
• Supports positive-comparator mode:
– Cmp0: 600-mV to 2.7-V adjustable threshold
– Cmp2: 300-mV fixed threshold
– Cmp1 and Cmp3: Disabled
• Reference for threshold adjustment: 100 μA, ±2%
• Trip threshold error: ±1% (max) at 250 mV
• Open-drain outputs
• Propagation delay: 280 ns (typ)
• High CMTI: 15 V/ns (min)
• Safety-related certifications:
– 7000-VPK reinforced isolation per DIN EN IEC
60747-17 (VDE 0884-17)
– 5000-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 AMC23C14 is a dual, isolated window
comparator with a short response time. The opendrain
outputs are separated from the input circuitry
by an isolation barrier that is highly resistant to
magnetic interference. This barrier is certified to
provide reinforced galvanic isolation of up to 5 kVRMS
according to VDE 0884-17 and UL1577, and supports
a working voltage of up to 1 kVPK.
Both comparators have windows that are centered
around 0 V, meaning that the comparators trip if the
input exceeds the thresholds in a positive or negative
direction. One comparator has fixed thresholds of
±300 mV. The second comparator has adjustable
thresholds from ±20 mV to ±300 mV through a single
external resistor.
The AMC23C14 also supports a positive-comparator
only mode. When the voltage on the REF pin
greater than 550 mV, the negative comparators
are disabled and only the positive comparators are
functional. The reference voltage in this mode can be
as high as 2.7 V. This mode is particularly useful for
monitoring positive voltage supplies.
The AMC23C14 is available in an 8-pin, wide-body
SOIC package and is specified over the extended
industrial temperature range of –40°C to +125°C.