Anterwell Technology Ltd.
Anterwell Technology Ltd.
Large Original stock of IC Electronics Components, Transistors, Diodes etc.
High Quality, Reasonable Price, Fast Delivery.
Anterwell Technology Ltd.
Large Original stock of IC Electronics Components, Transistors, Diodes etc.
High Quality, Reasonable Price, Fast Delivery.
Product Details:
Payment & Shipping Terms:
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| V+ To V− Reverse Voltage: | 20V | R Pin To V− Voltage: | 5V |
|---|---|---|---|
| Set Current: | 10 MA | Power Dissipation: | 400 MW |
| ESD Susceptibility (Note 6): | 2000VC | ||
| High Light: | multi emitter transistor,silicon power transistors |
||
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
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 guaranteed 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 guaranteed 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-46 hermetic, TO-92 and SO-8 plastic packages.
Absolute Maximum Ratings
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
|
V+ to V− Forward Voltage LM134/LM234/LM334 LM234-3/LM234-6 |
40V 30V |
| V+ to V− Reverse Voltage | 20V |
| R Pin to V− Voltage | 5V |
| Set Current | 10 mA |
| Power Dissipation | 400 mW |
| ESD Susceptibility (Note 6) | 2000V |
|
Operating Temperature Range (Note 5) LM134 |
−55˚C to +125˚C |
| Soldering Information | 260˚C |
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