数据搜索系统,热门电子元器件搜索 |
|
LM221 数据表(PDF) 1 Page - National Semiconductor (TI) |
|
|
LM221 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page TLH7769 February 1995 LM221LM321 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 series operates with supply voltages from g3V to g20V and has sufficient supply rejection to operate from unregulated supplies The operating current is programma- ble from 5 mAto200 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 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 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 The LM221 is specified over a b25 Cto a85 C range and the LM321 over a 0 Cto a70 C temperature range Features Y Guaranteed drift of LM321A02 mV C Y Guaranteed drift of LM221 series1 mV C Y Offset voltage less than 04 mV Y Bias current less than 10 nA at 10 mA operating current Y CMRR 126 dB minimum Y 120 dB supply rejection Y Easily nulled offset voltage Typical Applications Thermocouple Amplifier with Cold Junction Compensation TLH7769 1 Set for 298V at output with LM113 shorted Output should equal ambi- ent temperature at 10 mV K Adjust for output reading in C C1995 National Semiconductor Corporation RRD B30M115Printed in U S A |
类似零件编号 - LM221 |
|
类似说明 - LM221 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |