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LM334H データシート(PDF) 1 Page - National Semiconductor (TI) |
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LM334H データシート(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page LM134/LM234/LM334 3-Terminal Adjustable Current Sources General Description The LM134/LM234/LM334 are 3-terminal adjustable current sources featuring 10,000:1 range in operating current, excel- lent 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 ad- dition, 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 abso- lute temperature (˚K). The simplest one external resistor connection, then, generates a current with ≈+0.33%/˚C tem- perature 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 be- cause 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. Features n Operates from 1V to 40V n 0.02%/V current regulation n Programmable from 1µA to 10mA n True 2-terminal operation n Available as fully specified temperature sensor n ± 3% initial accuracy Connection Diagrams SO-8 Surface Mount Package SO-8 Alternative Pinout Surface Mount Package 00569724 Order Number LM334M or LM334MX See NS Package Number M08A 00569725 Order Number LM334SM or LM334SMX See NS Package Number M08A TO-46 Metal Can Package TO-92 Plastic Package 00569712 V− Pin is electrically connected to case. Bottom View Order Number LM134H, LM234H or LM334H See NS Package Number H03H 00569710 Bottom View Order Number LM334Z, LM234Z-3 or LM234Z-6 See NS Package Number Z03A March 2005 © 2005 National Semiconductor Corporation DS005697 www.national.com |
同様の部品番号 - LM334H |
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同様の説明 - LM334H |
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