Texas Instruments LM234
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.| Part No. | LM234 |
|---|---|
| Datasheet | LM234 Download |
| Manufacturer |  Texas Instruments |
| Description | 3-Terminal Adjustable Current Sources |
| Buy | Stock & Price |
FEATURES
1●2 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
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 ≈+0.33%/°C temperature dependence.
