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LM134H データシート(PDF) 1 Page - Linear Technology |
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LM134H データシート(HTML) 1 Page - Linear Technology |
1 / 12 page LM134 Series 1 APPLICATIO S DESCRIPTIO FEATURES TYPICAL APPLICATIO s Current Mode Temperature Sensing s Constant Current Source for Shunt References s Cold Junction Compensation s Constant-Gain Bias for Bipolar Differential Stage s Micropower Bias Networks s Buffer for Photoconductive Cell s Current Limiter s 1 µA to 10mA Operation s 0.02%/V Regulation s 0.8V to 40V Operating Voltage s Can be Used as Linear Temperature Sensor s Draws No Reverse Current s Supplied in Standard Transistor Packages Constant Current Source and Temperature Sensor The LM134 is a three-terminal current source designed to operate at current levels from 1 µA to 10mA, as set by an external resistor. The device operates as a true two- terminal current source, requiring no extra power connec- tions or input signals. Regulation is typically 0.02%/V and terminal-to-terminal voltage can range from 800mV to 40V. Because the operating current is directly proportional to absolute temperature in degrees Kelvin, the device will also find wide applications as a temperature sensor. The temperature dependence of the operating current is 0.336%/ °C at room temperature. For example, a device operating at 298 µA will have a temperature coefficient of 1 µA/°C. The temperature dependence is extremely accu- rate and repeatable. Devices specified as temperature sensors in the 100 µA to 1mA range are the LM134-3, LM234-3 and the LM134-6, LM234-6, with the dash numbers indicating ±3°C and ±6°C accuracies, respec- tively. If a zero temperature coefficient current source is re- quired, this is easily achieved by adding a diode and a resistor. , LTC and LT are registered trademarks of Linear Technology Corporation. Remote Temperature Sensor with Voltage Output Operating Current vs Temperature V+ V– R RSET 226 Ω VIN ≥ 5V R1 10k 10mV/ °K LM234-3 TA01a OPERATING CURRENT ( µA) 0 500 400 300 200 100 0 400 TA01b 100 200 300 500 225 125 25 –75 –175 –275 RSET = 226Ω |
同様の部品番号 - LM134H |
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同様の説明 - LM134H |
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