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To assess whether an unknown input is between two precise reference threshold voltages, a window detector circuit—also known as a window comparator circuit or dual edge limit detector circuit—is utilised.
To find over- or under-voltage, it uses two comparators. The common input voltage is detected by each comparator by comparison to one of two reference voltages, often upper and lower limits.
The input is recognised as being within the so-called “window” between the upper and lower reference by the outputs of a logic gate like AND.
Window detectors are utilised in production-line testing, level sensor and control systems, digital computers, and industrial alarms.
The Global window comparator market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
A wide-supply voltage window comparator with an operating range of 1.8V to 36V is the Texas Instruments TPS3701 36V Window Comparator.
Two open-drain outputs (OUTA and OUTB) with a 25V rating each are included in the device along with two precision comparators with internal 400mV references for over- and undervoltage detection.
Use the TPS3701 as a window comparator or as two separate voltage monitors; external resistors are used to set the monitored voltage.
When the voltage at the INA pin falls below the negative threshold, OUTA is driven low. When the voltage rises above the positive threshold, OUTA is driven high.
When the voltage at the INB pin exceeds the positive threshold, OUTB is pushed low. Conversely, when the voltage falls below the negative threshold, OUTB is driven high.
Hysteresis for noise rejection is integrated into both comparators of the TPS3701, ensuring steady output operation without false triggering.
