参数资料
型号: LM334Z#TRPBF
厂商: Linear Technology
文件页数: 1/12页
文件大小: 160K
描述: IC CURRENT SOURCE TO92-3
标准包装: 2,000
功能: 电流源
输入电压: 0.8 V ~ 40 V
电流 - 输出: 10mA
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: TO-226-3、TO-92-3(TO-226AA)成形引线
供应商设备封装: TO-92-3
包装: 带卷 (TR)
LM134 Series
1
APPLICATIO S
DESCRIPTIO
FEATURES
TYPICAL APPLICATIO
s
Current Mode Temperature Sensing
s
Constant Current Source for Shunt References
s
Cold Junction Compensation
s
Constant-Gain Bias for Bipolar Differential Stage
s
Micropower Bias Networks
s
Buffer for Photoconductive Cell
s
Current Limiter
s
1礎 to 10mA Operation
s
0.02%/V Regulation
s
0.8V to 40V Operating Voltage
s
Can be Used as Linear Temperature Sensor
s
Draws No Reverse Current
s
Supplied in Standard Transistor Packages
Constant Current Source
and Temperature Sensor
The LM134 is a three-terminal current source designed to
operate at current levels from 1礎 to 10mA, as set by an
external resistor. The device operates as a true two-
terminal current source, requiring no extra power connec-
tions 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%/癈 at room temperature. For example, a device
operating at 298礎 will have a temperature coefficient of
1礎/癈. The temperature dependence is extremely accu-
rate and repeatable. Devices specified as temperature
sensors in the 100礎 to 1mA range are the LM134-3,
LM234-3 and the LM134-6, LM234-6, with the dash
numbers indicating ?癈 and ?癈 accuracies, respec-
tively.
If a zero temperature coefficient current source is re-
quired, this is easily achieved by adding a diode and a
resistor.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Remote Temperature Sensor with Voltage Output
Operating Current vs Temperature
V
+
V

R
R
SET
226&
V
IN
 e 5V
R1
10k
10mV/癒
LM234-3
TA01a
OPERATING CURRENT (礎)
0
500
400
300
200
100
0
400
 TA01b
100
200
300
500
225
125
25
75
175
275
R
SET
 = 226&
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