参数资料
型号: LM385BZ-2.5/NOPB
厂商: National Semiconductor
文件页数: 8/22页
文件大小: 0K
描述: IC VREF SHUNT 2.5V TO-92-3
标准包装: 1,800
基准类型: 分流器
输出电压: 2.5V
容差: ±3%
温度系数: 150ppm/°C
通道数: 1
电流 - 阴极: 20µA
电流 - 输出: 20mA
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: TO-226-3、TO-92-3 标准主体
供应商设备封装: TO-92-3
包装: 散装
产品目录页面: 1308 (CN2011-ZH PDF)
其它名称: *LM385BZ-2.5
*LM385BZ-2.5/NOPB
LM385BZ-2.5NS
SNVS743D – DECEMBER 1999 – REVISED MARCH 2013
Calibration
Calibration
1.
2.
Short LM385-2.5-N, adjust R3 for I OUT =temp at 1 μ A/°K.
Remove short, adjust R2 for correct reading in centigrade
Figure 20. 0°C–100°C Thermomemter
1.
2.
Short LM385-2.5-N, adjust R3 for I OUT =temp at 1.8 μ A/°K
Remove short, adjust R2 for correct reading in °F
Figure 21. 0°F–50°F Thermomemter
Adjustment Procedure
1.
2.
Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature multiplied by the thermocouple Seebeck
coefficient.
Adjust zero ADJ pot until voltage across R2 equals the thermocouple Seebeck coefficient multiplied by 273.2.
Figure 22. Micropower Thermocouple Cold Junction Compensator
Thermocouple Type (1)
J
T
K
S
Seebeck
Coefficient
( μ V/°C)
52.3
42.8
40.8
6.4
R1
( Ω )
523
432
412
63.4
R2
( Ω )
1.24k
1k
953 Ω
150 Ω
Voltage Across R1
@25°C
(mV)
15.60
12.77
12.17
1.908
Voltage Across R2
(mV)
14.32
11.78
11.17
1.766
(1)
Typical supply current 50 μ A
8
Copyright ? 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM185-2.5-N LM285-2.5-N LM385-2.5-N
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