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Vedi Specifiche Tecniche

LM134H +BOM

3-Terminal Adjustable Current Source

Produttore:

Texas Instruments, Inc
ProduttorePart #:

LM134H
Scheda dati:

LM134H Scheda dati (PDF)
Function:

Current Source
Accuracy:

±3%
Voltage - Input:

1V ~ 40V
Current - Output:

Adjustable
EDA/CAD Modelli:

Richiedi modelli CAD gratuiti per LM134H

E-mail: [email protected]

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tel: +852 95804164

LM134H Descrizione generale

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.

Caratteristiche principali

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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Specifiche

Category	Integrated Circuits (ICs)Power Management (PMIC)Current Regulation/Management	Series	-
Function	Current Source	Sensing Method	-
Accuracy	±3%	Voltage - Input	1V ~ 40V
Current - Output	Adjustable	Operating Temperature	-55°C ~ 125°C
Mounting Type	Through Hole	Base Product Number	LM134

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