AMC23C12-Q1 Automotive, Fast Response, Reinforced Isolated Window Comparator
With Adjustable Threshold and Latch Function
1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to 125°C, T
A
• Wide high-side supply range: 3 V to 25 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, ±2%
• Trip threshold error: ±1% (max) at 250 mV
• Propagation delay: 290 ns (typ)
• High CMTI: 55 kV/μs (min)
• Open-drain output with optional latch mode
• Safety-related certifications:
– 7000-V
PK
reinforced isolation per DIN VDE V
0884-11: 2017-01
– 5000-V
RMS
isolation for 1 minute per UL1577
2 Applications
• Overcurrent or overvoltage detection in:
– HEV/EV charging piles
– HEV/EV onboard chargers (OBC)
– HEV/EV DC/DC converters
– HEV/EV traction inverters
3 Description
The AMC23C12-Q1 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
reinforced galvanic isolation of up to 5 kV
RMS
according to VDE V 0884-11 and UL1577, and
supports a working voltage of up to 1 kV
PK
.
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 AMC23C12-Q1 is available in an 8-pin, wide-
body SOIC package and is specified over the full
automotive temperature range of –40°C to +125°C.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
AMC23C12-Q1 SOIC (8) 5.85 mm × 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Low-side supply
(2.7..5.5 V)
AMC23C12-Q1
Reinforced Isolation
GND1
IN
REF
VDD1
RSHUNT
I
High-side supply
(3..27 V)
LDO
GND2
OUT
LATCH
VDD2
from MCU
to MCU
100
A
–
+
Typical Application
ADVANCE INFORMATION
AMC23C12-Q1
SBASAB6 – MARCH 2022
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change
without notice.
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