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LM134 Folha de dados(PDF) 1 Page - STMicroelectronics |
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LM134 Folha de dados(HTML) 1 Page - STMicroelectronics |
1 / 11 page 1/11 s OPERATES FROM 1V TO 40V s 0.02%/V CURRENT REGULATION s PROGRAMMABLE FROM 1µA TO 10mA s ±3% INITIAL ACCURACY DESCRIPTION The LM134/LM234/LM334 are 3-terminal adjust- able current sources characterized by: u an operating current range of 10000: 1 u an excellent current regulation u a wide dynamic voltage range of 1V t 10V The current is determined by an external resistor without requiring other external components. Reverse voltages of up to 20V will only draw a cur- rent of several microamperes. This enables the circuit to operate as a rectifier and as a source of current in a.c. applications. For the LM134/LM234/LM334, the voltage on the control pin is 64mV at +25°C and is directly pro- portional to the absolute temperature (°K). The simplest external resistor connection generates a current with ≈ 0.33%/°C temperature dependence. Zero drift can be obtained by adding an additional resistor and a diode to the external circuit. ORDER CODE Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) PIN CONNECTIONS (top view) Part Number Temperature Range Package ZD LM134 -55°C, +125°C •• LM234 -25°C, +100°C •• LM334 0°C, +70°C •• Z TO92 (Plastic Package) D SO8 (Plastic Micropackage) ADJ v+ v- 21 3 8765 1234 NC NC V- NC ADJ NC NC V+ TO92 (Top view) SO8 (Top view) LM134 LM234 - LM334 THREE TERMINAL ADJUSTABLE CURRENT SOURCES May 2003 |
Nº de peça semelhante - LM134 |
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Descrição semelhante - LM134 |
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