LM334S Constant Current Source and Temperature Sensor

The LM134 is a three-terminal current source designed to operate at current levels from 1µA to 10mA, as set by an external resistor. The device operates as a true two-terminal current source, requiring no extra power connections 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 298µA will have a temperature coefficient of 1µA/°C. The temperature dependence is extremely accurate and repeatable. Devices specified as temperature sensors in the 100µA 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, respectively.

If a zero temperature coefficient current source is required, this is easily achieved by adding a diode and a resistor.

产品特点 Features

1µA to 10mA Operation
0.02%/V Regulation
0.8V to 30V Operating Voltage
Can Be Used as linear Temperature Sensor
Draws No Reverse Current
Supplied in Standard Transistor Packages

参数

应用

Current Mode Temperature Sensing
Constant Current Source for Shunt References
Cold Junction Compensation
Constant-Gain Bias for Bipolar Differential Stage
Micropower Bias Networks
Buffer for Photoconductive Cell
Current Limiter

典型应用图

LM334S 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LM334S8	SO	8	C	$1.92	$1.45
LM334S8#PBF	SO	8	C	$1.92	$1.45
LM334S8#TR	SO	8	C	$1.98	$1.51
LM334S8#TRPBF	SO	8	C	$1.98	$1.51
LM334Z	TO-92	3	C	$1.92	$1.45
LM334Z#PBF	TO-92	3	C	$1.92	$1.45
LM334Z#TR	TO-92	3	C	$1.98	$1.51
LM334Z#TRPBF	TO-92	3	C	$1.98	$1.51

LM334S 数据手册及相关资料下载

数据手册 (英文) : LM134 Series - Constant Current Source and Temperature Sensor.PDF
可靠性数据 : R132 Reliability Data .PDF