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LM234Z-3 Datasheet(PDF) 1 Page - Texas Instruments |
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LM234Z-3 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 26 page LM134, LM234, LM334 www.ti.com SNVS746E – MARCH 2000 – REVISED MAY 2013 LM134/LM234/LM334 3-Terminal Adjustable Current Sources Check for Samples: LM134, LM234, LM334 1 FEATURES The sense voltage used to establish operating current 2 • Operates From 1V to 40V in the LM134 is 64mV at 25°C and is directly • 0.02%/V Current Regulation proportional to absolute temperature (°K). The • Programmable From 1 μA to 10mA simplest one external resistor connection, then, generates a current with ≈+0.33%/°C temperature • True 2-Terminal Operation dependence. Zero drift operation can be obtained by • Available as Fully Specified Temperature adding one extra resistor and a diode. Sensor Applications for the current sources include bias • ±3% Initial Accuracy networks, surge protection, low power reference, ramp generation, LED driver, and temperature DESCRIPTION sensing. The LM234-3 and LM234-6 are specified as The LM134/LM234/LM334 are 3-terminal adjustable true temperature sensors with ensured initial current sources featuring 10,000:1 range in operating accuracy of ±3°C and ±6°C, respectively. These current, excellent current regulation and a wide devices are ideal in remote sense applications dynamic voltage range of 1V to 40V. Current is because series resistance in long wire runs does not established with one external resistor and no other affect accuracy. In addition, only 2 wires are required. parts are required. Initial current accuracy is ±3%. The LM134 is specified over a temperature range of The LM134/LM234/LM334 are true floating current −55°C to +125°C, the LM234 from −25°C to +100°C sources with no separate power supply connections. and the LM334 from 0°C to +70°C. These devices In addition, reverse applied voltages of up to 20V will are available in TO hermetic, TO-92 and SOIC-8 draw only a few dozen microamperes of current, plastic packages. allowing the devices to act as both a rectifier and current source in AC applications. Connection Diagrams Figure 1. SOIC-8 Surface Mount Package Figure 2. SOIC-8 Alternative Pinout Surface Mount Package (LM334M; LM334M/NOPB; LM334MX; LM334MX/NOPB) (LM334SM; LM334SM/NOPB; LM334SMX; LM334SMX/NOPB) See Package Number D See Package Number D Figure 3. TO Metal Can Package (Bottom View) Figure 4. TO-92 Plastic Package (Bottom View) See Package Number NDV See Package Number LP 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2000–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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