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LM121H/883

更新时间： 2024-09-15 22:09:47
品牌 Logo 应用领域
美国国家半导体 - NSC 模拟IC信号电路放大器
页数 文件大小 规格书
11页 210K
描述
LM221/LM321 Precision Preamplifiers

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中文翻译

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LM121H/883 技术参数

是否Rohs认证：不符合生命周期：Obsolete
包装说明：,Reach Compliance Code：unknown
HTS代码：8542.39.00.01风险等级：5.91
Is Samacsys：N模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：O-MBCY-W8JESD-609代码：e0
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-25 °C
封装主体材料：METAL封装形状：ROUND
封装形式：CYLINDRICAL峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified表面贴装：NO
技术：BIPOLAR温度等级：OTHER
端子面层：Tin/Lead (Sn/Pb)端子形式：WIRE
端子位置：BOTTOM处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LM121H/883 数据手册

 浏览型号LM121H/883的Datasheet PDF文件第2页浏览型号LM121H/883的Datasheet PDF文件第3页浏览型号LM121H/883的Datasheet PDF文件第4页浏览型号LM121H/883的Datasheet PDF文件第5页浏览型号LM121H/883的Datasheet PDF文件第6页浏览型号LM121H/883的Datasheet PDF文件第7页 
February 1995  
LM221/LM321 Precision Preamplifiers  
General Description  
The LM221 series are precision preamplifiers designed to  
operate with general purpose operational amplifiers to dras-  
tically decrease dc errors. Drift, bias current, common mode  
and supply rejection are more than a factor of 50 better than  
standard op amps alone. Further, the added dc gain of the  
LM221 decreases the closed loop gain error.  
the LM221. The full differential input and high common-  
mode rejection are another advantage over choppers. For  
applications where low bias current is more important than  
drift, the operating current can be reduced to low values.  
High operating currents can be used for low voltage noise  
with low source resistance. The programmable operating  
current of the LM221 allows tailoring the input characteris-  
tics to match those of specialized op amps.  
g
The LM221 series operates with supply voltages from 3V  
to 20V and has sufficient supply rejection to operate from  
g
b a  
The LM221 is specified over a 25 C to 85 C range and  
unregulated supplies. The operating current is programma-  
ble from 5 mA to 200 mA so bias current, offset current, gain  
and noise can be optimized for the particular application  
while still realizing very low drift. Super-gain transistors are  
used for the input stage so input error currents are lower  
than conventional amplifiers at the same operating current.  
Further, the initial offset voltage is easily nulled to zero.  
§
§
the LM321 over a 0 C to 70 C temperature range.  
a
§
§
Features  
Y
Guaranteed drift of LM321AÐ0.2 mV/ C  
§
Y
Y
Y
Y
Y
Y
Guaranteed drift of LM221 seriesÐ1 mV/ C  
§
Offset voltage less than 0.4 mV  
Bias current less than 10 nA at 10 mA operating current  
CMRR 126 dB minimum  
The extremely low drift of the LM221 will improve accuracy  
on almost any precision dc circuit. For example, instrumen-  
tation amplifier, strain gauge amplifiers and thermocouple  
amplifiers now using chopper amplifiers can be made with  
120 dB supply rejection  
Easily nulled offset voltage  
Typical Applications  
Thermocouple Amplifier with Cold Junction Compensation  
*Set for 2.98V at output with LM113  
shorted. Output should equal ambi-  
ent temperature at 10 mV/ K.  
§
Adjust for output reading in C.  
²
§
TL/H/7769–1  
C
1995 National Semiconductor Corporation  
TL/H/7769  
RRD-B30M115/Printed in U. S. A.  
1234567...11

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