ISO7240CFDW datasheet(28/46 Pages) TI1

28 / 46 page

ISO7240CF, ISO7240C, ISO7240M

ISO7241C, ISO7241M, ISO7242C, ISO7242M

SLLS868R – SEPTEMBER 2007 – REVISED SEPTEMBER 2015

www.ti.com

10 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.

10.1 Application Information

ISO724x use single-ended TTL or CMOS-logic switching technology. Its supply voltage range is from 3.15 V to

5.5 V for both supplies, VCC1 and VCC2. When designing with digital isolators, it is important to keep in mind that

due to the single-ended design structure, digital isolators do not conform to any specific interface standard and

are only intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed

between the data controller (that is,

μC or UART), and a data converter or a line transceiver, regardless of the

interface type or standard.

10.2 Typical Application

10.2.1 Isolated Data Acquisition System for Process Control

ISO724x can be used with Texas Instruments' precision analog-to-digital converter and mixed signal micro-

controller to create an advanced isolated data acquisition system as shown in Figure 19.

Figure 19. Isolated Data Acquisition System for Process Control

10.2.1.1 Design Requirements

Unlike optocouplers, which need external components to improve performance, provide bias, or limit current,

ISO724x only needs two external bypass capacitors to operate.

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ISO7240CFDW 데이터시트(PDF) 28 Page - Texas Instruments