LM234

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100°C 3 引脚可调节电流源

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Iout/Iz (max) (mA) 0.01 Vin (min) (V) 0.8 Vin (max) (V) 40 Operating temperature range (°C) -25 to 100 Initial accuracy (max) (%) 3 Rating Catalog
Iout/Iz (max) (mA) 0.01 Vin (min) (V) 0.8 Vin (max) (V) 40 Operating temperature range (°C) -25 to 100 Initial accuracy (max) (%) 3 Rating Catalog
TO-92 (LP) 3 19.136 mm² 5.2 x 3.68
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM134/LM234/LM334 3-Terminal Adjustable Current Sources 数据表 (Rev. E) 2013年 6月 20日
电子书 Tips and tricks for designing with voltage references (Rev. A) 2021年 5月 7日
更多文献资料 使用电压基准进行设计的提示和技巧 (Rev. A) 2021年 5月 7日
应用手册 Precision Current Sources and Sinks Using Voltage References 2020年 6月 30日
应用手册 TO-92 Packing Options / Ordering Instructions (Rev. A) 2010年 6月 23日

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并联电压基准
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电流基准
LM134 3 端子可调节电流源 LM234 100°C 3 引脚可调节电流源 LM334 具有 0°C 至 70°C 工作温度范围的 3 引脚可调节电流源
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TO-92 (LP) 3 Ultra Librarian

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