LM334H/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Current Source
• Characteristics: Precision, Adjustable, Temperature Compensated
• Package: TO-92
• Essence: The LM334H/NOPB is a three-terminal adjustable current source that can be used to generate a precise current with temperature compensation.
• Packaging/Quantity: Available in tubes of 50 units or reels of 2,000 units.

Specifications

• Operating Voltage Range: 1V to 40V
• Output Current Range: 1µA to 10mA
• Temperature Coefficient: 0.33%/°C
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM334H/NOPB has three pins:

1. Pin 1 (Anode): Connected to the positive terminal of the power supply.
2. Pin 2 (Cathode): Connected to the load or circuit where the precise current is required.
3. Pin 3 (Adjust): Connected to an external resistor to set the desired output current.

Functional Features

• Precise and adjustable current source.
• Temperature compensated for stable performance across varying temperatures.
• Wide operating voltage range allows flexibility in different applications.
• Low quiescent current consumption.
• High output impedance for improved stability.

Advantages and Disadvantages

Advantages: - Provides a precise and stable current source. - Temperature compensation ensures consistent performance. - Easy to use and adjust the output current. - Can operate over a wide range of voltages.

Disadvantages: - Limited output current range compared to some other current sources. - Requires an external resistor for setting the output current.

Working Principles

The LM334H/NOPB is based on the principle of a two-transistor current source. It uses a precision bandgap reference and a temperature-compensated biasing circuit to generate a stable and adjustable current. The output current is set by an external resistor connected to the Adjust pin.

Detailed Application Field Plans

The LM334H/NOPB can be used in various applications, including:

1. Battery Charging: Precisely control the charging current for different battery types.
2. LED Driver: Provide a constant current to drive LEDs for consistent brightness.
3. Sensor Biasing: Generate a stable current for sensor biasing in measurement circuits.
4. Temperature Sensors: Use as a current source for temperature sensors to ensure accurate readings.
5. Analog Circuits: Provide a stable reference current for analog circuits, such as filters or amplifiers.

Detailed and Complete Alternative Models

• LM134: Similar functionality with a lower operating voltage range.
• LM336: Provides a precise voltage reference instead of a current source.
• LT3092: Adjustable current source with higher output current capability.

Note: This is not an exhaustive list, and there are other alternative models available from different manufacturers.

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