LF398M

Series:	--
Packaging:	Tube
Part Status:	Not For New Designs
Amplifier Type:	Sample and Hold
Number of Circuits:	1
Output Type:	--
Slew Rate:	--
Current - Input Bias:	10nA
Voltage - Input Offset:	2mV
Current - Supply:	4.5mA
Voltage - Supply, Single/Dual (±):	±5 V ~ 18 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	LF398

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Introduction

The LF398M is a high performance single-channel operational amplifier designed for a wide range of instrumentation and signal processing applications. This advanced monolithic op-amp incorporates two extremely low distortion and low noise signal paths and provides an excellent level of performance. The LF398M operates on a wide range of supply voltage and is capable of delivering high output current with a high signal-to-noise ratio, making it ideal for many linear and signal processing applications.

Application Field

The wide operating voltage range and high output current of the LF398M make it well-suited to a variety of instrumentation and signal processing applications. Some of the most popular applications include:

• Voice recognition systems: The LF398M can be used in voice recognition systems to improve the recognition accuracy by reducing noise in the signal. The low distortion, low noise, and wide operating voltage of the LF398M help to improve the recognition accuracy of such systems.
• Stroboscope: Stroboscopes are used for speed measurement and precision pulse generation. The LF398M provides a high degree of stability and accuracy for stroboscope applications.
• Precision analog-to-digital converters: The LF398M can be used in precision analog-to-digital converters (ADCs) to minimize the noise level and improve the accuracy of the digital output. The wide voltage range and high precision of the LF398M make it suitable for use in such ADCs.
• Instrumentation amplifiers: Instrumentation amplifiers are used in various types of measurements, such as pressure, vibration, or temperature. The LF398M provides high levels of linearity, low distortion, and low noise for instrumentation amplifier applications.

Working Principle

The LF398M is a single-channel operational amplifier optimized for linear and signal processing applications. It consists of two gate-controlled MOSFET (GDMOS) input stages followed by an internal current mirroring circuit.The GDMOS input stages have extremely low input bias current and are capable of supplying the necessary bias current to the MOSFET gate. The internal current mirroring circuit combines the input currents and provides them to the GDMOS transistors, which in turn control the gain of the LF398M.The GDMOS transistor provides a linear response to changes in input current and has a wide range of output/gain values. This allows the LF398M to be used in a wide range of applications that require high levels of linearity, low distortion, and low noise. The wide operating voltage of the LF398M also makes it suitable for a variety of instrumentation and signal processing applications.

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