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LM334 MWC
Integrated Circuits (ICs)

LM334 MWC

Active
Texas Instruments

0°C TO 70°C 3-PIN ADJUSTABLE CURRENT SOURCE

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsAN-C V/F Converter ICs Handle Frequency-to-Voltage Needs (Rev. B)TO-92 Packing Options / Ordering Instructions (Rev. A)+6
LM334 MWC
Integrated Circuits (ICs)

LM334 MWC

Active
Texas Instruments

0°C TO 70°C 3-PIN ADJUSTABLE CURRENT SOURCE

Deep-Dive with AI

DocumentsAN-C V/F Converter ICs Handle Frequency-to-Voltage Needs (Rev. B)TO-92 Packing Options / Ordering Instructions (Rev. A)+6

Technical Specifications

Parameters and characteristics for this part

SpecificationLM334 MWC
Accuracy6 %
Current - OutputAdjustable
FunctionCurrent Source
Mounting TypeSurface Mount
Operating Temperature [Max]70 °C
Operating Temperature [Min]0 °C
Package / CaseDie
Supplier Device PackageWafersale
Voltage - Input [Max]40 V
Voltage - Input [Min]1 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

DistributorPackageQuantity$
DigikeyBulk 1593$ 0.48
Texas InstrumentsNOT REQUIRED 1$ 0.85
100$ 0.66
250$ 0.48
1000$ 0.34

Description

General part information

LM334 Series

The LM134/LM234/LM334 are 3-terminal adjustable current sources featuring 10,000:1 range in operating current, excellent current regulation and a wide dynamic voltage range of 1V to 40V. Current is established with one external resistor and no other parts are required. Initial current accuracy is ±3%. The LM134/LM234/LM334 are true floating current sources with no separate power supply connections. In addition, reverse applied voltages of up to 20V will draw only a few dozen microamperes of current, allowing the devices to act as both a rectifier and current source in AC applications.

The sense voltage used to establish operating current in the LM134 is 64mV at 25°C and is directly proportional to absolute temperature (°K). The simplest one external resistor connection, then, generates a current with ≈+0.33%/°C temperature dependence. Zero drift operation can be obtained by adding one extra resistor and a diode.

Applications for the current sources include bias networks, surge protection, low power reference, ramp generation, LED driver, and temperature sensing. The LM234-3 and LM234-6 are specified as true temperature sensors with ensured initial accuracy of ±3°C and ±6°C, respectively. These devices are ideal in remote sense applications because series resistance in long wire runs does not affect accuracy. In addition, only 2 wires are required.