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LM139-MIL

SLCS160 – JUNE 2017

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Product Folder Links: LM139-MIL

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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

Logic Supply Voltage

1 µA to 4 mA

Input Overdrive Voltage

100 mV

Reference Voltage

2.5 V

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

incorrect comparisons.