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LM234

現行

100°C 3 接腳可調整電流源

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產品規格表

LM234

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Iout/Iz (max) (mA) 10 Vin (min) (V) 0.8 Vin (max) (V) 40 Initial accuracy (max) (%) 3 Operating temperature range (°C) -25 to 100
Rating Catalog Iout/Iz (max) (mA) 10 Vin (min) (V) 0.8 Vin (max) (V) 40 Initial accuracy (max) (%) 3 Operating temperature range (°C) -25 to 100
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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類型 標題 日期
* Data sheet LM134/LM234/LM334 3-Terminal Adjustable Current Sources datasheet (Rev. E) 2013年 6月 20日
E-book Tips and tricks for designing with voltage references (Rev. A) 2021年 5月 7日
Application note Precision Current Sources and Sinks Using Voltage References 2020年 6月 30日
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 2019年 6月 28日
Application note TO-92 Packing Options / Ordering Instructions (Rev. A) 2010年 6月 23日

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分流電壓參考
  • ATL431 — 2.5-V 低 IQ 可調整精密分流穩壓器
  • LM136-2.5-N — 電壓參考二極體
  • LM136-5.0 — 5.0 V 參考二極體
  • LM136-5.0QML — 5.0 V 參考二極體
  • LM136A-2.5QML — 2.5 V 參考二極體
  • LM136A-2.5QML-SP — 抗輻射 QMLV、2.5-V 分流電壓參考
  • LM136A-5.0QML — 5.0 V 參考二極體
  • LM185-1.2-N — 微功耗電壓參考二極體
  • LM185-1.2QML — 微功耗電壓參考二極體
  • LM185-1.2QML-SP — 抗輻射 QMLV、1.2-V 分流電壓參考
  • LM185-2.5-N — 微功耗電壓參考二極體
  • LM185-2.5QML — 微功耗電壓參考二極體
  • LM185-2.5QML-SP — 航太級 QMLV 2.5V 分流電壓參考
  • LM185-ADJ — 可調整微電源電壓參考
  • LM185QML — 可調整微電源電壓參考
  • LM285-1.2 — 1.235-V、–40°C 至 +85°C、微功率電壓參考
  • LM285-1.2-N — 1.235-V、–40°C 至 +85°C 微功耗電壓參考二極體
  • LM285-2.5 — 2.5-V、–40°C 至 +85°C、微功率電壓參考
  • LM285-2.5-N — 2.5-V、–40°C 至 +85°C 微功耗電壓參考二極體
  • LM285-ADJ — 可調式 85°C 微功耗電壓參考
  • LM336-2.5 — 0°C 至 70°C、2.5-V 整合式參考電路
  • LM336-2.5-N — 電壓參考二極體
  • LM336-5.0 — 5-V 參考二極體
  • LM385-1.2 — 1.235-V、2%、0°C 至 70°C 微功率電壓參考
  • LM385-1.2-MIL — 微功耗電壓參考
  • LM385-1.2-N — 1.235-V、0°C 至 70°C 微功耗電壓參考二極體
  • LM385-2.5 — 2.5-V、2%、70°C、微功率電壓參考
  • LM385-2.5-N — 2.5-V、0°C 至 70°C 微功耗電壓參考二極體
  • LM385-ADJ — 可調式 70°C 微功耗電壓參考
  • LM4030 — 超高精確分流電壓參考
  • LM4040 — 固定電壓、45-µA 精密微功率分流電壓參考
  • LM4040-N — 100-ppm/°C 精密微功率分流電壓參考
  • LM4040-N-Q1 — 車用 100-ppm/°C 精密微功率分流電壓參考
  • LM4041-N — 固定式與可調式 45-µA 精密微功率分流電壓參考
  • LM4041-N-Q1 — 車用精密微功率分流電壓參考
  • LM4050-N — 50-ppm/°C 精密微功率分流電壓參考
  • LM4050-N-Q1 — 車用 50-ppm/°C 精密微功率分流電壓參考
  • LM4050QML-SP — 抗輻射 QMLV、2.5-V 或 5-V 分流電壓參考
  • LM4051-N — 固定式與可調式精密微功率分流電壓參考
  • LM431 — 2%、1% 或 0.5% 準確度，可調整精密齊納分流穩壓器
  • LM4431 — 微功耗分流電壓參考
  • LMV431 — 1.5% 低電壓 (1.24-V) 可調式精密分流穩壓器
  • LMV431A — 1% 低電壓 (1.24-V) 可調式精密分流穩壓器
  • LMV431B — 0.5% 低電壓 (1.24-V) 可調式精密分流穩壓器
當前文獻的參考和來源
  • LM134 — 3 端子可調節電流源
  • LM234 — 100°C 3 接腳可調整電流源
  • LM334 — 0°C 至 70°C 3 接腳可調整電流源
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