MAX923ESA+T

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Linear - comparators are devices used for comparing two voltage levels and generating a corresponding output based on the results of the comparison. The MAX923ESA+T is an integrated linear-comparator from Maxim Integrated, a California-based semiconductor company. It is used in applications such as precision DC/DC converters and power supply sequencing. It can also be used in current sensing and voltage monitoring applications.

Features

The MAX923ESA+T has several features that make it a suitable choice for these applications:

• Very low power consumption
• High speed response of 350 ns
• High input impedance of 10 MΩ
• High accuracy of 1 mV
• Low voltage operation of 1.2 V
• Wide operating temperature range of -40°C to 125°C
• Small form factor ( 3 mm x 3mmWQFN package)

Application Field

The MAX923ESA+T can be used for a variety of applications. These include:

• DC/DC converters – The comparator can be used to compare two voltage levels, and generate a control signal for switching between the two levels for a fast and accurate conversion.
• Power Supply Sequencing – The comparator can be used to compare two power supply voltages, and generate a signal to switch from one voltage to another in a predetermined order.
• Current sensing – The comparator can be used to compare the current in a sensing circuit vs a reference voltage. If the current exceeds the reference voltage, an alert or control signal can be generated.
• Voltage Monitoring – The comparator can be used to monitor the voltage in a given circuit. If the monitored voltage exceeds or falls below a set threshold, an alert or control signal can be generated.

Working Principle

The working principle of the MAX923ESA+T is based on the comparison of two voltage levels. The two voltage levels are referred to as Vref and VIN. The comparator compares the two signals and generates an output signal depending on the result of the comparison.

The output signal is logic high if VIN exceeds Vref and logic low if VIN is less than Vref. The output signal can also be inverted if required. The output of the comparator can also be latched to hold the condition of the last comparison. This helps in applications where there is a need to hold the last condition of the comparator.

The MAX923ESA+T also has a disable pin that can be used to disable the comparator in order to save power. This pin can be controlled through logic signals or through a logic output from an external microcontroller.

The MAX923ESA+T is an ideal choice for high accuracy, low power applications such as precision DC/DC converters, power supply sequencing, current sensing, and voltage monitoring. With its wide operating temperature range, high input impedance, and fast response, it can be used in a variety of applications.

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