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LM234

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100°C 3 引腳可調節電流源

產品詳情

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 下載最新的英語版本 日期
* 數據表 LM134/LM234/LM334 3-Terminal Adjustable Current Sources 數據表 (Rev. E) 2013年 6月 20日
電子書 Tips and tricks for designing with voltage references (Rev. A) 2021年 5月 7日
更多文獻資料 使用電壓基準進行設計的提示和技巧 (Rev. A) 2021年 5月 7日
應用手冊 Precision Current Sources and Sinks Using Voltage References 2020年 6月 30日
應用手冊 TO-92 Packing Options / Ordering Instructions (Rev. A) 2010年 6月 23日

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支持的產品和硬件

支持的產品和硬件

產品
裸片和晶圓服務
LM336-2.5-MIL — 并聯電壓基準
并聯電壓基準
ATL431 — 2.5V 低 IQ 可調節精密并聯穩壓器 LM136-2.5-N — 電壓基準二極管 LM136-5.0 — 5.0V 基準二極管 LM136-5.0QML — 5.0V 基準二極管 LM136A-2.5QML — 2.5V 基準二極管 LM136A-2.5QML-SP — 耐輻射 QMLV、2.5V 并聯電壓基準 LM136A-5.0QML — 5.0V 基準二極管 LM185-1.2-N — 微功耗電壓基準二極管 LM185-1.2QML — 微功耗電壓基準二極管 LM185-1.2QML-SP — 耐輻射 QMLV、1.2V 并聯電壓基準 LM185-2.5-N — 微功耗電壓基準二極管 LM185-2.5QML — 微功耗電壓基準二極管 LM185-2.5QML-SP — 航天級 QMLV 2.5V 并聯電壓基準 LM185-ADJ — 可調節微功耗電壓基準 LM185QML — 可調節微功耗電壓基準 LM285-1.2 — 具有 -40°C 至 +85°C 工作溫度范圍的 1.235V 微功耗基準電壓 LM285-1.2-N — 溫度范圍為 -40°C 至 +85°C 的 1.235V 微功耗基準電壓二極管 LM285-2.5 — 具有 -40°C 至 +85°C 工作溫度范圍的 2.5V 微功耗基準電壓 LM285-2.5-N — 溫度范圍為 -40°C 至 +85°C 的 2.5V 微功耗基準電壓二極管 LM285-ADJ — 可調節、85°C、微功耗電壓基準 LM336-2.5 — 具有 0°C 至 70°C 工作溫度范圍的 2.5V 集成參考電路 LM336-2.5-N — 電壓基準二極管 LM336-5.0 — 5V 基準電壓二極管 LM385-1.2 — 具有 0°C 至 70°C 工作溫度范圍的 1.235V、2%、微功耗基準電壓 LM385-1.2-MIL — 微功耗電壓基準源 LM385-1.2-N — 溫度范圍為 0°C 至 70°C 的 1.235V 微功耗基準電壓二極管 LM385-2.5 — 2.5V、2%、70°C、微功耗基準電壓 LM385-2.5-N — 溫度范圍為 0°C 至 70°C 的 2.5V 微功耗基準電壓二極管 LM385-ADJ — 可調節、70°C、微功耗電壓基準 LM4030 — 超高精度并聯電壓基準 LM4040 — 固定和電壓、45μA、精密微功耗并聯電壓基準 LM4040-N — 100ppm/°C 精密微功耗并聯電壓基準 LM4040-N-Q1 — 汽車類 100ppm/°C 精密微功耗并聯電壓基準 LM4041-N — 固定和可調節、45μA、精密微功耗并聯電壓基準 LM4041-N-Q1 — 汽車類精密微功耗并聯電壓基準 LM4050-N — 50ppm/°C 精密微功耗并聯電壓基準 LM4050-N-Q1 — 汽車類 50ppm/°C 精密微功耗并聯電壓基準 LM4050QML-SP — 耐輻射 QMLV、2.5V 或 5V 并聯電壓基準 LM4051-N — 固定和可調節、精密微功耗并聯電壓基準 LM431 — 精度為 2%、1% 或 0.5% 的可調精密齊納并聯穩壓器 LM4431 — 微功耗并聯電壓基準 LMV431 — 1.5%、低電壓 (1.24V) 可調節精密并聯穩壓器 LMV431A — 1%、低電壓 (1.24V) 可調節精密并聯穩壓器 LMV431B — 0.5%、低電壓 (1.24V) 可調節精密并聯穩壓器
電流基準和電流源
LM134 — 3 端子可調節電流源 LM234 — 100°C 3 引腳可調節電流源 LM334 — 具有 0°C 至 70°C 工作溫度范圍的 3 引腳可調節電流源
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