LF398M

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LF398-N MONOLITHIC SAMPLE AND HO

  • FabricanteNational Semiconductor

  • Peça do Fabricante #LF398M

  • Ficha Técnica LF398M DataSheet

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Especificações

Atributo Valor
Part Status Active
Amplifier Type Sample and Hold
Number of Circuits 1
Current - Input Bias 10 nA
Voltage - Input Offset 2 mV
Current - Supply 4.5mA
Voltage - Supply Span (Min) 10 V
Voltage - Supply Span (Max) 36 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

Visão Geral

Description

The LF398M is a precision sample-and-hold amplifier commonly used in analog signal processing applications. It allows for the sampling of an input voltage and maintains (or "holds") this value for a specified period, enabling accurate analog-to-digital conversion. Key features of the LF398M include low droop rate, which ensures minimal voltage decay during the hold phase, and high input impedance, allowing it to interface effectively with a variety of signal sources without significant loading effects.
The LF398M operates with a wide range of supply voltages and offers a fast acquisition time, making it suitable for high-speed applications. It typically includes a FET input stage for improved performance characteristics, such as low bias current and offset voltage. The device is commonly used in data acquisition systems, digital voltmeters, and audio signal processing.
Overall, the LF398M is valued for its precision, reliability, and versatility in maintaining signal integrity during the sampling process, making it a fundamental component in various electronic and instrumentation applications.

Equivalent

The LF398M is a precision sample-and-hold amplifier. Equivalent or similar products include:
1. AD781 from Analog Devices
2. ICL7650 from Intersil/Renesas
3. OPA615 from Texas Instruments
4. TL710C from Texas Instruments
5. HA5320 from Intersil/Renesas
These alternatives may have variations in specifications, so it’s essential to review their datasheets to ensure compatibility with your application.

Features

The LF398M is a precision sample-and-hold amplifier featuring high accuracy and fast acquisition times. Key features include:
1. High Accuracy: It offers a low input offset voltage and low drift over temperature, ensuring precise signal sampling.
2. Fast Acquisition: Capable of acquiring input signals quickly, making it suitable for applications requiring rapid sampling.
3. Low Droop Rate: Maintains signal integrity over time with minimal voltage droop when the hold mode is active.
4. Wide Bandwidth: Supports a wide range of input frequencies, allowing it to handle various signal types.
5. Single Supply Operation: Can operate on a single power supply, simplifying design requirements.
6. Wide Temperature Range: Suitable for use in environments with varying temperatures, maintaining performance over a broad range.
7. Compact Size: Available in a compact package, making it ideal for space-constrained applications.
These features make the LF398M suitable for applications in data acquisition systems, sample-and-hold circuits, and other precision signal processing tasks.

Pinout

The LF398M is a precision sample-and-hold amplifier IC. It typically comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. Here is a concise description of the pin functions:
1. Pin 1 (BAL/COMP): Balance/Compensation. Used for offset voltage balancing or compensation.
2. Pin 2 (V-): Negative supply voltage.
3. Pin 3 (INPUT): Signal input pin where the analog signal to be sampled is applied.
4. Pin 4 (GROUND): Ground reference for the device.
5. Pin 5 (HOLD CAPACITOR): Connection for the hold capacitor, which stores the sampled voltage.
6. Pin 6 (OUTPUT): Output pin where the held voltage is available.
7. Pin 7 (HOLD/CONTROL): Control input to switch between sample (track) and hold modes.
8. Pin 8 (V+): Positive supply voltage.
The LF398M is designed for high accuracy and low droop rate, making it suitable for precision applications where an analog signal needs to be sampled and held constant for a period of time.

Manufacturer

The LF398M is a precision sample-and-hold amplifier manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and produces a wide range of electronic components and integrated circuits. TI is well-known for its innovation in analog and digital signal processing, power management, and embedded processing solutions. As a leader in the semiconductor industry, the company serves diverse markets, including automotive, industrial, consumer electronics, and communications equipment. TI focuses on developing reliable and efficient technologies that enhance performance and functionality in various electronic devices and systems.

Application

The LF398M is a precision sample-and-hold amplifier used in various applications requiring accurate signal processing. Key application areas include:
1. Data Acquisition Systems: Ensures stable signal capture for analog-to-digital conversion.
2. Analog Signal Processing: Provides temporary storage of analog signals for filtering and analysis.
3. Telecommunications: Enhances signal integrity by stabilizing fluctuating signals.
4. Industrial Control Systems: Aids in maintaining precise control over processes by holding sensor data.
5. Medical Instruments: Used in imaging and diagnostic equipment for capturing and holding vital signal data.
6. Instrumentation: Provides accurate signal sampling in test and measurement equipment.
These applications benefit from the LF398M's low offset, low drift, and high accuracy characteristics.

Package

The LF398M is typically available in an 8-pin SOIC (Small Outline Integrated Circuit) package.

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