ISL21440IUZ

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The ISL21440IUZ is a dual, precision, low-power, comparator circuit housed in a 4mm x 4mm, 20-pin QFN package. Its architecture is based on the latest low-power technology, thereby making it suitable for a wide range of applications such as precision analog-to-digital converters (ADC), signal conditioners, ultra-low-power signal amplifiers, and signal processing systems. Moreover, its integrated on-chip ESD protection and low output impedance ensure that the output of the comparator remains stable no matter what environment it is operated in.
The purpose of a comparator is to compare two input signals’ levels, usually an analog voltage and/or a current signal. Depending on which signal is greater, the output of the comparator will either be low or high. The ISL21440IUZ is no exception and is designed to provide high output immunity from inputs, low power consumption, and high accuracy. It is built with a dual, low-power CMOS structure with on-chip ESD protection and a low output impedance. The device also features a single-ended power supply operation that operates with a voltage range of +1V to +6V, making it compatible with a wide range of systems.

In terms of its application field, the ISL21440IUZ is versatile and finds application in many areas. It is commonly used in data acquisition systems, such as ADC and DACs, as a low-power, on-chip comparator. As mentioned earlier, its precision and low-power consumption make the ISL21440IUZ a preferred choice for many analog and mixed-signal systems such as signal-processing systems, power-management systems, ultra-low-power signal amplifiers, and many others. Additionally, its low output impedance enables it to bear capacitive loading without affecting the device’s output accuracy.

Working principle of ISL21440IUZ is based on dual, CMOS low-power structure. It is designed to compare two input signals and deliver a high or low output accordingly. It is able to accurately compare voltages which are within its range of -3.3V to +3.3V. The input common-mode voltage range of the device is ±2.15V; however, with an adjustable reference pin (VREF) it can be extended to ±3V. The current level at which the device provides an output is adjustable by changing the threshold latch-up current (TVCC). The device can reach a maximum speed of 400 kHz, making it an ideal choice for high-speed systems as it can quickly provide an output.

The ISL21440IUZ is a single-ended comparator circuit, which operates in a temperature range of -40°C to +85°C and consumes a maximum power of 2.3 mW at 1.8V. It also features an on-chip ESD protection that allows it to withstand up to 2 kV ESD stress. The output impedance is 0.45Ω and the maximum output current is 45mA. The input bias current of the device is 100nA and the current limit is 500 mA.

In conclusion, the ISL21440IUZ is a versatile, precision, low-power, dual comparator circuit which can be used in a wide range of applications. It features high accuracy, low power consumption, single-ended power supply operation, and on-chip ESD protection. The device can operate reliably within the temperature range of -40°C to +85°C and provide an output quickly with a maximum speed of 400 kHz. Additionally, its adjustable reference pin and threshold latch-up current make it a preferred choice in precision applications such as ADC, DACs and signal processing systems.

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