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LM285LP-1-2 데이터시트(PDF) 8 Page - Texas Instruments

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부품명 LM285LP-1-2
상세설명  Micropower Voltage References
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LM285LP-1-2 데이터시트(HTML) 8 Page - Texas Instruments

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36 k
1.2 V
5 V
LM385-1.2
LM285-1.2, LM385-1.2, LM385B-1.2
SLVS075J – APRIL 1989 – REVISED JANUARY 2015
www.ti.com
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The The LM285-1.2, LM385-1.2, and LM385-1.2 devices create a voltage reference for to be used for a variety of
applications including amplifiers, power supplies, and current-sensing circuits. The following application shows
how to use these devices to establish a voltage reference.
9.2 Typical Application
Figure 8. Generating Reference Voltage with a Resistive Current Source
9.2.1 Design Requirements
The key design requirement when using this device as a voltage reference is to supply the LM385 with a
minimum Cathode Current (IZ), as indicated in Electrical Characteristics.
9.2.2 Detailed Design Procedure
In order to generate a constant and stable reference voltage, a current greater than IZ(MIN) must be sourced into
the cathode of this device. This can be accomplished using a current regulating device such as LM334 or a
simple resistor. For a resistor, its value should be equal to or greater than (Vsupply - Vreference) ÷ IZ(MIN) .
8
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Copyright © 1989–2015, Texas Instruments Incorporated
Product Folder Links: LM285-1.2 LM385-1.2 LM385B-1.2


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