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See Technical Specifications

LM334MX/NOPB

0°C to 70°C 3-pin adjustable current source

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM334MX/NOPB
Datasheet:

LM334MX/NOPB Datasheet (PDF)
Iout/Iz (max) (mA):

0.01
Vin (min) (V):

0.8
Vin (max) (V):

40
Operating temperature range (°C):

-40 to 85, 0 to 70
EDA/CAD Models:

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LM334MX/NOPB General Description

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.

The LM134 is specified over a temperature range of −55°C to +125°C, the LM234 from −25°C to +100°C and the LM334 from 0°C to +70°C. These devices are available in TO hermetic, TO-92 and SOIC-8 plastic packages.

Key Features

Operates From 1V to 40V
0.02%/V Current Regulation
Programmable From 1µA to 10mA
True 2-Terminal Operation
Available as Fully Specified Temperature Sensor
±3% Initial Accuracy

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Specifications

Iout/Iz (max) (mA)	0.01	Vin (min) (V)	0.8
Vin (max) (V)	40	Operating temperature range (°C)	-40 to 85, 0 to 70
Initial accuracy (max) (%)	6	Rating	Catalog
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	8	feature-cecc-qualified	No
feature-esd-protection	Yes	feature-escc-qualified
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No