LM393DR2G Dual Comparator Low Power Open-Collector Output Wide 2V-36V Supply ESD Protected Industry Standard Cost-Effective Reliable Performance

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Features

andbull; Wide Single-Supply Range: 2.0 Vdc to 36 Vdc

andbull; Split-Supply Range: andplusmn;1.0 Vdc to andplusmn;18 Vdc

andbull; Very Low Current Drain Independent of Supply Voltage: 0.4 mA

andbull; Low Input Bias Current: 25 nA

andbull; Low Input Offset Current: 5.0 nA

andbull; Low Input Offset Voltage: 5.0 mV (max) LM293/393

andbull; Input Common Mode Range to Ground Level

andbull; Differential Input Voltage Range Equal to Power Supply Voltage

andbull; Output Voltage Compatible with DTL, ECL, TTL, MOS, and CMOS Logic Levels

andbull; ESD Clamps on the Inputs Increase the Ruggedness of the Device without Affecting Performance

andbull; NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable

andbull; These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant

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Applications

1. Level Detection and Conversion

Thanks to its open-collector output structure, it can easily achieve conversion and isolation between different voltage levels, serving as a bridge between digital and analog systems.

Specific Applications: Analog signal threshold detection for microcontrollers (Arduino, STM32), converting analog signals to digital logic levels (TTL/CMOS), system voltage monitoring (over-voltage/under-voltage protection).

2. Sensor Signal Threshold Detection

This is one of its core applications. It can compare continuous sensor signals with a reference voltage and output a digital signal to trigger subsequent actions when the signal exceeds or falls below the threshold.

Specific Applications: Photoelectric sensors, temperature control (thermostats), liquid level detection, smoke alarms, proximity switches.

3. Square Wave and Pulse Wave Generation

By configuring positive feedback (Schmitt trigger mode), it can effectively convert slowly changing or noisy analog signals into clean, sharp digital pulses, providing immunity to jitter and noise.

Specific Applications: Waveform shaping, generating square waves from sine waves, switch debouncing circuits, pulse width modulation (PWM) generation.

4. Window Comparator

Using both comparators in the LM393, a window comparator circuit can be built to determine whether a signal voltage falls within or outside two preset voltage limits (window).

Specific Applications: Battery voltage monitoring (checking if the voltage is within the normal range), safety range monitoring in process control.

5. Low-Power and Battery-Powered Devices

The LM393 operates over a wide voltage range (down to 2V) and has very low quiescent current consumption, making it ideal for power-sensitive portable devices and significantly extending battery life.

Specific Applications: Remote controls, wireless sensor nodes, portable instruments, Internet of Things (IoT) devices.

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Description

The LM393 series are dual independent precision voltage comparators capable of single or split supply operation. These devices are designed to permit a common mode range-to-ground level with single supply operation. Input offset voltage specifications as low as 2.0 mV make this device an excellent selection for many applications in consumer, automotive, and industrial electronics.

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INFORMATION

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