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LM134H +BOM
3-Terminal Adjustable Current Source
TO-46-
Manufacturer:
-
Mfr.Part #:
LM134H
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Datasheet:
-
Function:
Current Source
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Accuracy:
±3%
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Voltage - Input:
1V ~ 40V
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Current - Output:
Adjustable
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EDA/CAD Models:
Availability: 4878 PCS
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LM134H 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 ≈+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 ensured 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 specified 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 hermetic, TO-92 and SOIC-8 plastic packages.
Key Features
- 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
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Specifications
Category | Integrated Circuits (ICs)Power Management (PMIC)Current Regulation/Management | Series | - |
Function | Current Source | Sensing Method | - |
Accuracy | ±3% | Voltage - Input | 1V ~ 40V |
Current - Output | Adjustable | Operating Temperature | -55°C ~ 125°C |
Mounting Type | Through Hole | Base Product Number | LM134 |
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In Stock: 4,878
Minimum Order: 1
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