LM293DR2

Current - Output (Typ):	--
Base Part Number:	LM293
Supplier Device Package:	8-SOIC
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	--
Hysteresis:	--
Propagation Delay (Max):	--
CMRR, PSRR (Typ):	--
Current - Quiescent (Max):	2.5mA
Series:	--
Current - Input Bias (Max):	--
Voltage - Input Offset (Max):	--
Voltage - Supply, Single/Dual (±):	2 V ~ 36 V, ±1 V ~ 18 V
Output Type:	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Number of Elements:	2
Type:	General Purpose
Part Status:	Obsolete
Packaging:	Cut Tape (CT)

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LM293DR2 Linear - Comparators Application Field and Working Principle

The LM293DR2 is a linear-comparator. It is used to amplify the magnitude of input signals and produce an output that is proportional to the magnitude of the input. This device is capable of both positive and negative input voltage signals and is suited for low power, medium accuracy applications.

Application Field

The LM293DR2 is primarily used to compare two voltage signals and produce an output based on the comparison result. It is commonly used in various electronic circuit applications such as analog comparators, power supply control, temperature and pressure monitoring, as well as in analog-to-digital converters and analog integrated circuits. The LM293DR2 is also suitable for general purpose analog feedback and servo motor control applications. It has been used in a range of robotics systems, including robotic arms and autonomous vehicles. Additionally, the device has found use in the field of medical instrumentation for patient monitoring.

Working Principle

The LM293DR2 is a linear-comparator, which means it can compare two voltage signals and produce an output based on the comparison result. It accepts two input voltage signals, referred to as V1 and V2. The LM293DR2 compares the magnitude of the two inputs and produces an output voltage (Vs) that is proportional to the difference of the two. The output of the device, Vs, will be at the positive or negative supply rail, depending on the slope of the input signal, which is determined by the hysteresis voltage (VH) and the offset voltage (VO). The hysteresis voltage (VH) is the voltage difference between the two inputs at which the output changes state; this helps to reduce noise and false triggering of the device. The offset voltage (VO) is an adjustable voltage applied between the two inputs in order to correct any output errors due to mismatch in their magnitudes. The offset voltage can be adjusted using an external resistor connected to the pin on the LM293DR2 labeled V1.

Conclusion

The LM293DR2 is a linear-comparator used for comparison applications such as analog comparators, analog-to-digital converters, power supply control, and medical instrumentation. It is capable of amplifying input signals and producing an output voltage proportional to the difference of the two input voltages. The output voltage is determined by the slope of the input and is affected by the hysteresis and offset voltages. The device is suitable for low power, medium accuracy applications.

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