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参数资料
| 型号： | LM134MWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, UUC |
| 封装： | WAFER |
| 文件页数： | 8/20页 |
| 文件大小： | 362K |
| 代理商： | LM134MWC |
National P/N LM334 - 3-Terminal Adjustable Current Source
LM334Z
3
MSL Full production N/A
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$0.4650
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LM334
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LM334H
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MSL Full production N/A
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$1.5200
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[logo]2T
LM334H
LM334 MDC
Full production
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N/A Samples
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LM334 MWC
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General Description
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 [Approximate]+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 guaranteed 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 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
q
Operates from 1V to 40V
q
0.02%/V current regulation
q
Programmable from 1A to 10mA
q
True 2-terminal operation
q
Available as fully specified temperature sensor
q
±3% initial accuracy
Application Notes
Title
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file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM334.html (2 of 3) [Aug-09-2002 11:49:52 AM]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM134Z | 制造商: 功能描述: 制造商:undefined 功能描述: |
| LM134ZT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Three terminal adjustable current sources |
| LM135 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Precision temperature sensors |
| LM135_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Precision temperature sensors |
| LM135A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Precision Temperature Sensors |
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