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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Famc21c12″>View Datasheet
Texas Instruments AMC21C12 Isolated Window Comparator is an isolated window comparator with an open-drain output and an optional latch function. The open-drain output is galvanically isolated from the input circuitry by an isolation barrier, which is highly resistant to magnetic interference. The isolation barrier supports a working voltage of up to 200VRMS or 280VDC and transient overvoltages of up to 570VRMS or 800VDC.
The comparison window is centered at 0V, meaning that the comparator trips if the absolute value of the input voltage exceeds the trip threshold value. A single external resistor adjusts the trip threshold from 20mV to 300mV. The comparison window ranges from ±20mV to ±300mV. The negative comparator is disabled when the voltage on the REF pin is greater than 550mV, and only the positive comparator is functional. The reference voltage in this mode can be as high as 2.7V. 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 Texas Instruments AMC21C12 is available in an 8-pin, 0.65mm pitch VSON package and is specified over the extended industrial temperature range of –40°C to +125°C.
