LM334Z Adjustable Current Sources

Sophie

Published: 24 June 2021 | Last Updated: 24 June 2021

2606

LM334Z

LM334Z

STMicroelectronics

3 Pin LM334 Current regulator 1 Outputs 0°C~70°C

Purchase Guide

3 Pin LM334 Current regulator 1 Outputs 0°C~70°C

LM334Z is an adjustable current sources. This article mainly introduce its pinout, application, datasheet PDF and other detailed informations about STMicroelectronics LM334Z.

Been looking for a current source for my videos for a while and came across these LM334 (LM334Z) integrated circuits in the 3 pin TO92 package. All you need to change the current value is to chang the value of one resistor. I looked through the datasheet and then made this video where I get a few current values that hold true even when you add resistance to either end of the coponent's current path.

Quick look at my new LM334 LM334Z constant current source IC in TO92 package by electronzap

LM334Z Description

The LM334Z is 3-terminal adjustable current sources characterized by:

■ an operating current range of 10000

an excellent current regulation

a wide dynamic voltage range of 1V t 10V

The current is determined by an external resistor without requiring other external components. Reverse voltages of up to 20V will only draw a current of several microamperes. 

This enables the circuit to operate as a rectifier and as a source of current in a.c. applications. For the LM334Z, the voltage on the control pin is 64mV at +25°C and is directly proportional to the absolute temperature (°K). 

The simplest external resistor connection generates a current with approximately 0.33%/°C temperature dependence. Zero drift can be obtained by adding an additional resistor and a diode to the external circuit.


LM334Z Pinout

LM334Z Pinout.jpg

LM334Z CAD Model

Symbol

Symbol.png

Footprint

Footprint.png

3D Model

LM334Z 3D Model.jpg

LM334Z Schemetic Diagram

Schematic diagram.png

LM334Z Features

This section mentions some of the features of LM334Z Adjustable Current Sources

■ Operates from 1V to 40V

■ 0.02%/V current regulation

■ Programmable from 1µA to 10mA

■ ±3% initial accuracy


Specifications

STMicroelectronics LM334Z technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics LM334Z.
  • Type
    Parameter
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Through Hole
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Through Hole
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    TO-226-3, TO-92-3 (TO-226AA)
  • Number of Pins
    3
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    0°C~70°C
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Bulk
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Obsolete
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    1 (Unlimited)
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    LM334
  • Function

    The parameter "Function" in electronic components refers to the specific role or purpose that the component serves within an electronic circuit. It defines how the component interacts with other elements, influences the flow of electrical signals, and contributes to the overall behavior of the system. Functions can include amplification, signal processing, switching, filtering, and energy storage, among others. Understanding the function of each component is essential for designing effective and efficient electronic systems.

    Current Source
  • Number of Outputs
    1
  • Body Length or Diameter

    Body length or diameter in electronic components refers to the physical dimensions of a component's housing, typically measured in millimeters or inches. It indicates the size of the component that affects its fit within a circuit board or system. This parameter is crucial for ensuring compatibility with the design and mounting of electronic devices. It can impact heat dissipation, electrical performance, and overall assembly efficiency. Accurate measurement of body length or diameter is essential for proper component selection and placement in electronic applications.

    5mm
  • Body Breadth

    Body breadth in electronic components refers to the width of the physical body of a component, such as a resistor, capacitor, or integrated circuit. This measurement is crucial for ensuring proper fit within a circuit board or enclosure. It can affect the component's thermal performance, mechanical stability, and overall compatibility with other components in a design. Body breadth is typically specified in millimeters or inches and is an important factor in the selection and design of electronic assemblies.

    4 mm
  • Supply Voltage-Min (Vsup)

    The parameter "Supply Voltage-Min (Vsup)" in electronic components refers to the minimum voltage level required for the component to operate within its specified performance range. This parameter indicates the lowest voltage that can be safely applied to the component without risking damage or malfunction. It is crucial to ensure that the supply voltage provided to the component meets or exceeds this minimum value to ensure proper functionality and reliability. Failure to adhere to the specified minimum supply voltage may result in erratic behavior, reduced performance, or even permanent damage to the component.

    1V
  • Termination Type

    Termination Type in electronic components refers to the method used to connect the component to a circuit board or other electronic devices. It specifies how the component's leads or terminals are designed for soldering or mounting onto a PCB. Common termination types include through-hole, surface mount, and wire lead terminations. The termination type is an important consideration when selecting components for a circuit design, as it determines how the component will be physically connected within the circuit. Different termination types offer varying levels of durability, ease of assembly, and suitability for specific applications.

    SOLDER
  • Nominal Supply Current

    Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

    10mA
  • Output Current

    The rated output current is the maximum load current that a power supply can provide at a specified ambient temperature. A power supply can never provide more current that it's rated output current unless there is a fault, such as short circuit at the load.

    10μA
  • Accuracy

    Accuracy in electronic components refers to the degree to which a measured value agrees with the true or accepted value. It evaluates the precision of a component in providing correct output or measurement under specified conditions. High accuracy indicates minimal deviation from the actual value, while low accuracy shows significant error in measurement. This parameter is crucial in applications where precise data is essential for reliable performance and decision-making.

    ±3%
  • Forward Voltage

    the amount of voltage needed to get current to flow across a diode.

    40V
  • Sensors/Transducers Type

    In electronic components, the parameter "Sensors/Transducers Type" refers to the specific type of sensor or transducer that is integrated into the component. Sensors are devices that detect changes in physical properties and convert them into electrical signals, while transducers are devices that convert one form of energy into another. The type of sensor or transducer used in an electronic component can vary widely depending on the intended application, such as temperature sensors, pressure sensors, proximity sensors, accelerometers, and more. Understanding the Sensors/Transducers Type parameter is crucial for selecting the right component for a particular electronic system or device, as different types of sensors/transducers have different functionalities and performance characteristics.

    TEMPERATURE SENSOR,ANALOG,RESISTANCE BASED
  • Housing

    Housing in electronic components refers to the physical enclosure that protects the internal circuitry and components from environmental factors such as dust, moisture, and mechanical damage. It provides structural support and electrical insulation while facilitating heat dissipation. The design and materials used for housing are crucial for the reliability and performance of the electronic device, as they impact factors like thermal management, electromagnetic interference, and overall aesthetics.

    PLASTIC
  • Body Height

    In electronic components, "Body Height" refers to the vertical dimension of the component's physical body or package. It is the measurement from the bottom of the component to the top, excluding any leads or terminals. Body Height is an important parameter to consider when designing circuit boards or enclosures to ensure proper fit and clearance. It is typically specified in datasheets or technical drawings provided by the component manufacturer. Understanding the Body Height of electronic components is crucial for proper placement and integration within a circuit or system.

    5mm
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
0 Similar Products Remaining

LM334Z Application

Here are some of the applications of LM334Z Adjustable Current Sources

● Bias networks,

● Surge protection

●Low power reference

● Ramp generation

●LED driver

●Temperature sensing


LM334Z Package

TO-226-3, TO-92-3 (TO-226AA)


LM334Z Physical Dimensions

Physical Dimensions.png

LM334Z Manufacturer

STMicroelectronics is a global independent semiconductor company and is a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivaled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence trends.


Trend Analysis

Datasheet PDF

Download datasheets and manufacturer documentation for STMicroelectronics LM334Z.
Frequently Asked Questions

1.How to connect LM334 when used as a temperature sensor?

The connection only needs to connect a resistor between the R terminal and the -VIN terminal, and the voltage is DC. A few hundred ohms of resistance Rset is almost the same.

2.What IC can measure the resistance value and convert it into a digital signal to be read by the single-chip microcomputer?

There are many ways to measure resistance:
Constant current source: Some chips such as LM334 itself are a constant current source. Let a constant current flow through the measured resistance, and then use AD to measure the voltage (when the voltage is too small, use a proportional amplifier circuit composed of an operational amplifier to amplify it), and send it to the single-chip microcomputer for analysis.

3.I now need to make a constant current source power supply circuit for the sensor. The system voltage is 5V, the sensor's internal resistance is 4.5K and 3.6K, and the constant current is 0.6mA or 0.8mA. Is LM334Z OK?

LM334 doesn't work, its current is 10mA. You can use TL317CLP to realize the constant current function.
LM334Z

STMicroelectronics

In Stock: 5050

United States

China

Canada

Japan

Russia

Germany

United Kingdom

Singapore

Italy

Hong Kong(China)

Taiwan(China)

France

Korea

Mexico

Netherlands

Malaysia

Austria

Spain

Switzerland

Poland

Thailand

Vietnam

India

United Arab Emirates

Afghanistan

Åland Islands

Albania

Algeria

American Samoa

Andorra

Angola

Anguilla

Antigua & Barbuda

Argentina

Armenia

Aruba

Australia

Azerbaijan

Bahamas

Bahrain

Bangladesh

Barbados

Belarus

Belgium

Belize

Benin

Bermuda

Bhutan

Bolivia

Bonaire, Sint Eustatius and Saba

Bosnia & Herzegovina

Botswana

Brazil

British Indian Ocean Territory

British Virgin Islands

Brunei

Bulgaria

Burkina Faso

Burundi

Cabo Verde

Cambodia

Cameroon

Cayman Islands

Central African Republic

Chad

Chile

Christmas Island

Cocos (Keeling) Islands

Colombia

Comoros

Congo

Congo (DRC)

Cook Islands

Costa Rica

Côte d’Ivoire

Croatia

Cuba

Curaçao

Cyprus

Czechia

Denmark

Djibouti

Dominica

Dominican Republic

Ecuador

Egypt

El Salvador

Equatorial Guinea

Eritrea

Estonia

Eswatini

Ethiopia

Falkland Islands

Faroe Islands

Fiji

Finland

French Guiana

French Polynesia

Gabon

Gambia

Georgia

Ghana

Gibraltar

Greece

Greenland

Grenada

Guadeloupe

Guam

Guatemala

Guernsey

Guinea

Guinea-Bissau

Guyana

Haiti

Honduras

Hungary

Iceland

Indonesia

Iran

Iraq

Ireland

Isle of Man

Israel

Jamaica

Jersey

Jordan

Kazakhstan

Kenya

Kiribati

Kosovo

Kuwait

Kyrgyzstan

Laos

Latvia

Lebanon

Lesotho

Liberia

Libya

Liechtenstein

Lithuania

Luxembourg

Macao(China)

Madagascar

Malawi

Maldives

Mali

Malta

Marshall Islands

Martinique

Mauritania

Mauritius

Mayotte

Micronesia

Moldova

Monaco

Mongolia

Montenegro

Montserrat

Morocco

Mozambique

Myanmar

Namibia

Nauru

Nepal

New Caledonia

New Zealand

Nicaragua

Niger

Nigeria

Niue

Norfolk Island

North Korea

North Macedonia

Northern Mariana Islands

Norway

Oman

Pakistan

Palau

Palestinian Authority

Panama

Papua New Guinea

Paraguay

Peru

Philippines

Pitcairn Islands

Portugal

Puerto Rico

Qatar

Réunion

Romania

Rwanda

Samoa

San Marino

São Tomé & Príncipe

Saudi Arabia

Senegal

Serbia

Seychelles

Sierra Leone

Sint Maarten

Slovakia

Slovenia

Solomon Islands

Somalia

South Africa

South Sudan

Sri Lanka

St Helena, Ascension, Tristan da Cunha

St. Barthélemy

St. Kitts & Nevis

St. Lucia

St. Martin

St. Pierre & Miquelon

St. Vincent & Grenadines

Sudan

Suriname

Svalbard & Jan Mayen

Sweden

Syria

Tajikistan

Tanzania

Timor-Leste

Togo

Tokelau

Tonga

Trinidad & Tobago

Tunisia

Turkey

Turkmenistan

Turks & Caicos Islands

Tuvalu

U.S. Outlying Islands

U.S. Virgin Islands

Uganda

Ukraine

Uruguay

Uzbekistan

Vanuatu

Vatican City

Venezuela

Wallis & Futuna

Yemen

Zambia

Zimbabwe

Related Parts More