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LM234

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100°C 3 引腳可調(diào)節(jié)電流源

產(chǎn)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(biāo)題 下載最新的英語版本 日期
* 數(shù)據(jù)表 LM134/LM234/LM334 3-Terminal Adjustable Current Sources 數(shù)據(jù)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(xiàn)資料 使用電壓基準(zhǔn)進(jìn)行設(shè)計(jì)的提示和技巧 (Rev. A) 2021年 5月 7日
應(yīng)用手冊(cè) Precision Current Sources and Sinks Using Voltage References 2020年 6月 30日
應(yīng)用手冊(cè) TO-92 Packing Options / Ordering Instructions (Rev. A) 2010年 6月 23日

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計(jì)算工具

SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR — Shunt Voltage Reference External Resistor Quick Start Calculator

This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)

支持的產(chǎn)品和硬件

支持的產(chǎn)品和硬件

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