Linear Technology/QD Devices
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LM399H
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LM399H

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Reference
  • Characteristics: High Precision, Low Temperature Coefficient, Low Noise
  • Package: TO-5 Metal Can
  • Essence: Precision Voltage Reference
  • Packaging/Quantity: Tube/100 pieces

Specifications

  • Voltage Output: 2.5V
  • Initial Accuracy: ±0.02%
  • Temperature Coefficient: 2ppm/°C
  • Operating Temperature Range: -55°C to +125°C
  • Output Current: 10mA
  • Noise Voltage: 1.5µVrms (10Hz to 10kHz)
  • Supply Voltage: 4.5V to 40V
  • Quiescent Current: 1.5mA

Pin Configuration

The LM399H has a 3-pin configuration:

  1. Vout: Voltage Output
  2. Vin: Supply Voltage Input
  3. GND: Ground

Functional Features

  • High precision voltage reference with low temperature coefficient
  • Excellent long-term stability and low noise performance
  • Wide operating temperature range for various applications
  • Low power consumption and high output current capability
  • Easy to use in both single-ended and differential configurations

Advantages and Disadvantages

Advantages: - Exceptional accuracy and stability - Low temperature coefficient ensures reliable performance over a wide temperature range - Low noise output for sensitive applications - Versatile supply voltage range allows flexibility in system design - Robust packaging provides protection against environmental factors

Disadvantages: - Relatively higher cost compared to standard voltage references - Limited availability of alternative models with similar specifications

Working Principles

The LM399H is based on the principle of bandgap voltage reference. It utilizes a combination of bipolar and MOS technologies to achieve high precision and stability. The device generates a stable 2.5V output voltage that remains constant over temperature variations.

Detailed Application Field Plans

The LM399H is widely used in applications that require precise and stable voltage references, such as:

  1. Precision analog-to-digital converters (ADCs)
  2. Digital-to-analog converters (DACs)
  3. Voltage regulators
  4. Oscillators and frequency synthesizers
  5. Temperature sensors and control systems
  6. Test and measurement equipment
  7. Calibration standards

Alternative Models

While the LM399H is a highly regarded voltage reference, there are alternative models available with similar specifications. Some notable alternatives include:

  1. LTZ1000: A precision voltage reference with ultra-low noise and excellent long-term stability.
  2. REF102: High-precision voltage reference with low temperature coefficient and wide operating temperature range.
  3. MAX6126: Ultra-low noise, high-precision voltage reference suitable for demanding applications.
  4. ADR4550: Precision voltage reference with low drift and excellent line regulation.

These alternative models offer comparable performance and can be considered based on specific application requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LM399H en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LM399H in technical solutions:

  1. Q: What is LM399H? A: LM399H is a precision voltage reference integrated circuit (IC) commonly used in technical applications that require stable and accurate voltage references.

  2. Q: What is the voltage output range of LM399H? A: The voltage output range of LM399H is typically between 6.9V and 7.1V.

  3. Q: How accurate is LM399H? A: LM399H is known for its high accuracy, with typical initial accuracy of ±0.01% and long-term stability of ±50ppm/year.

  4. Q: Can LM399H be used as a temperature sensor? A: No, LM399H is primarily designed as a voltage reference and not intended for temperature sensing applications.

  5. Q: What is the operating temperature range of LM399H? A: LM399H can operate within a temperature range of -55°C to +125°C.

  6. Q: Is LM399H suitable for battery-powered applications? A: Yes, LM399H has low power consumption and can be used in battery-powered applications where precise voltage references are required.

  7. Q: Can LM399H be used in high-precision measurement equipment? A: Absolutely, LM399H's high accuracy and stability make it an excellent choice for high-precision measurement instruments like multimeters or data acquisition systems.

  8. Q: Does LM399H require external components for operation? A: Yes, LM399H requires a few external passive components such as resistors and capacitors to set up the desired output voltage and improve stability.

  9. Q: Can LM399H tolerate reverse polarity? A: No, LM399H is not designed to tolerate reverse polarity. Care should be taken to ensure correct polarity during installation.

  10. Q: Are there any application notes or reference designs available for LM399H? A: Yes, the manufacturer of LM399H provides application notes and reference designs that can help users understand its usage in various technical solutions.

Please note that these answers are general and may vary depending on specific use cases and requirements.