LM234Z-3/NOPB
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Texas Instruments LM234Z-3/NOPB

Manufacturer No:
LM234Z-3/NOPB
Manufacturer:
Texas Instruments
Package:
Bulk
Description:
IC CURRENT SOURCE 3% TO92-3
Delivery:
Payment:
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Product Introduction

Overview

The LM234Z-3/NOPB is a 3-terminal adjustable current source produced by Texas Instruments. This device is part of the LM134/LM234/LM334 family, known for their versatility and precision in current regulation. The LM234Z-3/NOPB operates within a temperature range of -25°C to +100°C, making it suitable for a variety of applications requiring stable current sources over a wide temperature range.

Key Specifications

ParameterUnitsMinTypMax
Operating Voltage RangeV140
Reverse VoltageV20
Set Current RangeμA110,000
Set Current Error (V+=2.5V)%±1±2
Temperature Coefficient of Set Current%/°C0.336%
Operating Temperature Range°C-25100
Power DissipationmW400
ESD SusceptibilityV2000

Key Features

  • Operates from 1V to 40V, allowing for a wide dynamic voltage range.
  • Programmable from 1μA to 10mA with a simple external resistor connection.
  • True 2-terminal operation with no separate power supply connections required.
  • Excellent current regulation with 0.02%/V.
  • Available as a fully specified temperature sensor with ±3°C initial accuracy.
  • Reverse applied voltages of up to 20V draw only a few dozen microamperes of current, making it suitable for AC applications.

Applications

  • Bias networks: The LM234Z-3/NOPB can be used to provide stable current sources in biasing circuits.
  • Surge protection: Its ability to handle reverse voltages makes it useful in surge protection circuits.
  • Low power reference: Ideal for applications requiring low power current references.
  • Ramp generation: Can be used to generate ramps in various circuits.
  • LED driver: Suitable for driving LEDs with precise current control.
  • Temperature sensing: The device can be used as a temperature sensor due to its temperature-dependent current output.

Q & A

  1. What is the operating voltage range of the LM234Z-3/NOPB?
    The operating voltage range is from 1V to 40V.
  2. What is the temperature range for the LM234Z-3/NOPB?
    The operating temperature range is from -25°C to +100°C.
  3. How is the set current programmed in the LM234Z-3/NOPB?
    The set current is programmed using a simple external resistor connection.
  4. What is the maximum power dissipation for the LM234Z-3/NOPB?
    The maximum power dissipation is 400 mW.
  5. Is the LM234Z-3/NOPB suitable for AC applications?
    Yes, it can handle reverse applied voltages of up to 20V, making it suitable for AC applications.
  6. What is the initial accuracy of the set current for the LM234Z-3/NOPB?
    The initial accuracy of the set current is ±3%.
  7. Can the LM234Z-3/NOPB be used as a temperature sensor?
    Yes, it can be used as a temperature sensor due to its temperature-dependent current output.
  8. What is the ESD susceptibility of the LM234Z-3/NOPB?
    The ESD susceptibility is 2000V.
  9. What packages are available for the LM234Z-3/NOPB?
    The device is available in TO-92 packages.
  10. Does the LM234Z-3/NOPB have built-in ESD protection?
    No, it has limited built-in ESD protection, and precautions should be taken during storage and handling.

Product Attributes

Function:Current Source
Sensing Method:- 
Accuracy:±1%
Voltage - Input:1V ~ 40V
Current - Output:Adjustable
Operating Temperature:-25°C ~ 100°C
Mounting Type:Through Hole
Package / Case:TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:TO-92-3
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Similar Products

Part Number LM234Z-3/NOPB LM234Z-6/NOPB
Manufacturer Texas Instruments Texas Instruments
Product Status Active Active
Function Current Source Current Source
Sensing Method - -
Accuracy ±1% ±2%
Voltage - Input 1V ~ 40V 1V ~ 40V
Current - Output Adjustable Adjustable
Operating Temperature -25°C ~ 100°C -25°C ~ 100°C
Mounting Type Through Hole Through Hole
Package / Case TO-226-3, TO-92-3 (TO-226AA) TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package TO-92-3 TO-92-3

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