BU7251SG-TR

Current - Input Bias (Max):	1pA @ 3V
Base Part Number:	BU7251
Supplier Device Package:	5-SSOP
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Operating Temperature:	-40°C ~ 105°C
Hysteresis:	--
Propagation Delay (Max):	550ns
CMRR, PSRR (Typ):	80dB CMRR, 80dB PSRR
Current - Quiescent (Max):	35µA
Current - Output (Typ):	6mA @ 3V
Series:	--
Voltage - Input Offset (Max):	11mV @ 3V
Voltage - Supply, Single/Dual (±):	1.8 V ~ 5.5 V, ±0.9 V ~ 2.75 V
Output Type:	Push-Pull
Number of Elements:	1
Type:	General Purpose
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Linear - Comparators

Comparators are electronic components used to compare two input voltages and outputs a logical level dependent on the output from the comparison. Linear-comparators are most commonly used in the analog-to-digital conversion process and are designed to be used for applications where the input voltages are highly sensitive. The BU7251SG-TR is a low-power comparator used in such applications.

Application Field

The BU7251SG-TR was designed to be an ultra-low power consumption comparator with high speed and low differential input voltage. It is used in a variety of applications such as mobile handsets and portable electronic devices. For example, it can be used in touchscreens and other devices where precise position sensing of a finger tip is required. It is also used in audio applications for power saving and for precise feedback to a digital signal processor.

Working Principle

The BU7251SG-TR has two active voltage inputs, the inverting input (Vin) and the non-inverting input (Vref). When the voltage of the inverting input is less than the non-inverting input, the output will be low. Conversely, if the voltage of the inverting input is higher than the non-inverting input, the output will be high.The output of the comparator is a voltage level which is determined by the difference between the two input voltages. In order to ensure accurate comparison, it is important that the input voltages are matched. This can be done by using external components, such as voltage regulators or operational amplifiers, to adjust the input voltages.In addition, the BU7251SG-TR features a hysteresis adjustment to ensure that the comparator does not oscillate when the voltage between the two inputs is very close. This hysteresis adjustment can be set using an external resistor on the hysteresis terminal.

Advantages

The BU7251SG-TR has a number of advantages over other comparators, namely its low power consumption, high speed, and low differential input voltage. It is also lower-cost than some of its competitors.The low power consumption of the BU7521SG-TR is beneficial for portable and mobile applications, allowing for extended run times for the device. The high speed of the comparator is beneficial for applications which require quick response times, such as touchscreens. Finally, the low differential input voltage ensures that the comparator is not affected by electrostatic interference.

Conclusion

The BU7521SG-TR is a low-power comparator used in a variety of applications, such as mobile handsets and portable electronic devices. It has a number of advantages over its competitors, including its low power consumption, high speed, and low differential input voltage. The hysteresis adjustment ensures that the comparator does not oscillate when the input voltages are very close, allowing for accurate and reliable comparisons.

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