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LM139JB датащи(PDF) 8 Page - Texas Instruments

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номер детали LM139JB
подробное описание детали  Quad Differential Comparators
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производитель  TI1 [Texas Instruments]
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LM139JB датащи(HTML) 8 Page - Texas Instruments

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LM139-MIL
SLCS160 – JUNE 2017
www.ti.com
Product Folder Links: LM139-MIL
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
8 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. Validate and test
the design implementation to confirm system functionality.
8.1 Application Information
Typically, a comparator compares either a single signal to a reference, or to two different signals. Many users
take advantage of the open-drain output to drive the comparison logic output to a logic voltage level to an MCU
or logic device. The wide supply range and high voltage capability makes the LM139-MIL device optimal for level
shifting to a higher or lower voltage.
8.2 Typical Application
Figure 7. Single-Ended and Differential Comparator Configurations
8.2.1 Design Requirements
For this design example, use the parameters listed in Table 1 as the input parameters.
Table 1. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Input Voltage Range
0 V to Vsup-1.5 V
Supply Voltage
4.5 V to VCC maximum
Logic Supply Voltage
0 V to VCC maximum
Output Current (RPULLUP)
1 µA to 4 mA
Input Overdrive Voltage
100 mV
Reference Voltage
2.5 V
Load Capacitance (CL)
15 pF
8.2.2 Detailed Design Procedure
When using the LM139-MIL in a general comparator application, determine the following:
Input voltage range
Minimum overdrive voltage
Output and drive current
Response time
8.2.2.1 Input Voltage Range
When choosing the input voltage range, the input common-mode voltage range (VICR) must be taken in to
account. If temperature operation is above or below 25°C the VICR can range from 0 V to VCC– 2 V. This limits
the input voltage range to as high as VCC– 2 V and as low as 0 V. Operation outside of this range can yield
incorrect comparisons.


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