+

½ LM2903

Vref

Vin

+

½ LM2903

Vin-

Vin+

C

L

C

L

14

LM193, LM293, LM293A, LM393, LM393A, LM2903, LM2903V, LM393B, LM2903B

SLCS005AA – OCTOBER 1979 – REVISED SEPTEMBER 2019

www.ti.com

Product Folder Links: LM193 LM293 LM293A LM393 LM393A LM2903 LM2903V LM393B LM2903B

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Copyright © 1979–2019, 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. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The device is typically used to compare a single signal to a reference or two signals against each other. 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 this comaprator 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-2 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 device 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

comparisons.