LMV422MM/NOPB

Voltage - Input Offset:	1mV
Base Part Number:	LMV422
Supplier Device Package:	10-VSSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	2.7 V ~ 5.5 V, ±1.35 V ~ 2.75 V
Current - Output / Channel:	16mA
Current - Supply:	400µA
Series:	--
Current - Input Bias:	5pA
Gain Bandwidth Product:	8MHz
Slew Rate:	3.8 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	General Purpose
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LMV422MM/NOPB Application Field and Working Principle

The LMV422MM/NOPB is an instrumentation grade, single op amp designed for a variety of amplifier and buffer applications. It is a high-speed, low-noise, single-supply operational amplifier. The LMV422MM/NOPB is bipolar-verified, offers open loop gain, wide dynamic range and low noise power output. It is a part of National Semiconductor\'s instrumentation amplifier family and operates from a 4.5 V supply voltage.

Features and Benefits

The LMV422MM/NOPB is a low-noise single op amp designed for a variety of amplifier and buffer applications. The LMV422MM/NOPB comes with a high common-mode rejection ratio (CMRR), low power consumption and wide bandwidth. It is also protected against reverse polarity and common mode failure.The LMV422MM/NOPB also provides industry-leading low-noise performance of -124dBV through 0.5V/div in single-supply operation. Its high speed operation with lower noise power output enables the part to be used in audio applications.The LMV422MM/NOPB also provides fast settling time and wide dynamic range along with its high CMRR. Its high common-mode rejection minimizes the noise from external circuitry. The part is stable over both temperature and supply voltage and is ideal for battery operated devices.

Applications

The LMV422MM/NOPB has been designed for a variety of amplifier and buffer applications. It is suitable for a variety of linear applications such as amplifiers, bridges, filters, power amplifiers and summing circuits. The part is also ideal for applications such as photo-diode amplifiers, comparators, integrating circuits and instrumentation circuits.

Working Principle

The LMV422MM/NOPB has a highly integrated design which includes a transconductance amplifier as well as a voltage and current feedback to reduce noise and ensure stability in the closed loop state. The current feedback is used to attenuate the 1/f noise floor at high gains, while the voltage feedback provides frequency compensation over an extended range of gains.The amplifier also includes common mode rejection and isolation of the inverting and non-inverting inputs. This is done by a differential amplifier which is used to sense the differential signal between the inputs. The differential amplifier signals are then used to provide a feedback signal for the voltage and current feedback circuits. The differential amplifier is also used to reject common-mode signals, ensuring high performance and reliable operation over a wide range of signal levels.The part also features short-circuit current limiting, overtemperature protection and reverse polarity protection. The short-circuit protection is used to prevent the amplifier from exceeding its maximum power output, while the reverse-polarity protection prevents damage to the part due to reverse voltage and current. The overtemperature protection is used to protect the part from overheating, preventing damage due to excessive temperature.

Conclusion

The LMV422MM/NOPB is a high-speed, low-noise single op amp that is bipolar-verified and performs excellent in a variety of amplifier and buffer applications. It is protected against reverse polarity, common mode failure and also provides industry-leading low- noise performance. The part also features short-circuit current limiting, overtemperature protection and reverse-polarity protection, ensuring reliable operation over a wide range of signal levels. The LMV422MM/NOPB is an ideal choice for a variety of linear applications.

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