LM239ADR

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LM239ADR is a Linear-Comparator, a general-purpose low-power quad differential comparator made by Texas Instruments. It has four independent, high-speed voltage comparators that provide a response time of typically 8 microseconds, making it an ideal solution for applications requiring high-speed performance, such as clock and data recovery circuitry. This low-power, low-price device will provide a wide range of system design advantages including cost, reduced power consumption, and improved performance.

LM239ADR applications include motor control, temperature measurement, analog-to-digital converters and sensor interface, over-voltage monitoring, voltage-sensing comparator, flash analog-to-digital converters, and audio voltage detection.

The LM239ADR features two comparator inputs, with a selectable, adjustable threshold level. The device also features a low-voltage adjustment pin, which provides a reference voltage other than the power supply voltage to the input pins. This allows the device to handle a wide range of inputs, from small voltages to large voltages. The device also has a common mode input range of -1V to VCC +1V. This input range allows the device to accept both differential and single-ended inputs.

The LM239ADR also has a logic-level output. The output is set high if the input voltage is greater than the reference voltage, otherwise it is set low. This output can be used to drive a TTL/CMOS logic device, for example a driver for a motor, or to control other particular system functions.

The LM239ADR is fully specified for operation with a supply voltage of +/- 5 V and a maximum temperature of +125°C. It is offered in an 8-pin PDIP or SOIC package. It requires only 1.2mA quiescent current and consumes only 1µA in power-down mode.

The LM239ADR draws low-power and provides high-speed performance with adjustable or selectable threshold and hysteresis levels. This attractive package of features makes Comparator suitable for a variety of applications.

The operating principle of the LM239ADR can be understood in a few simple steps. The device has two inputs and a reference voltage. When a voltage is applied to the input terminals, it is compared to the reference voltage. If the input voltage is higher than the reference voltage, the output is set to logic high, otherwise the output is set low.

The LM239ADR also has an adjustable threshold level. The adjustable threshold level is set by a resistor/capacitor network. The device can be configured for either positive or negative hysteresis via the hysteresis control pin. The hysteresis control pin allows the user to adjust the hysteresis level to provide improved response over a wide range of input voltages.

The LM239ADR is a great choice for applications requiring high-speed performance, such as clock and data recovery circuitry. It is low-power, cost-effective, and provides adjustable or selectable threshold and hysteresis levels. Additionally, the device can easily deal with a wide range of input voltage levels, and provides a logic level output that can be used to drive a TTL/CMOS logic device.

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