ISO6042HDFPR datasheet(33/56 Pages) TI2

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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 ISO604x devices are high-performance, low power, quad-channel digital isolators. These devices come

with enable pins on each side which can be used to put the respective outputs in high impedance for parallel

(multiple) driver applications. The ISO604x devices use single-ended CMOS-logic switching technology.

The supply voltage range is from 1.71V to 5.5V for both supplies, VCC1 and VCC2. Since an isolation barrier

separates the two sides, each side can be sourced independently with any voltage within the Recommended

Operating Conditions section. As an example, supplying ISO604x VCC1 with 3.3V (which is within 1.71V to 5.5V)

and VCC2 with 5V (which is also within 1.71V to 5.5V) is possible. You can use the digital isolator as a logic-level

translator in addition to providing isolation. When designing with digital isolators, keep in mind that because of

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, MCU or FPGA), and a data converter or a line transceiver, regardless of the interface

type or standard.

9.2 Typical Application

Figure 9-1 shows an isolated serial peripheral interface (SPI) for analog input with minimal SPI connections and

Figure 9-2 shows the same ADC with all digital IOs and SPI isolated.

Sitara

C2000

TM4Cxx

Microcontroller

VSS

VDDIO

GND

AINP

SCLK

SDI

SDO/DRDY

AINN

Analog

Input

VCC1

VCC2

GND1

INA

OUTD

INB

OUTA

OUTB

INC

EN1

ISO6041

OUTC

IND

EN2

SPI_SDI

SPI_SDO

SPI_CLK

SPI_nCS

GND2

VCore

ISO Barrier

ADS127L21

ADS127L18

ADS127L11

Figure 9-1. Isolated SPI for an Analog Input, Minimal SPI Connections to ADC

www.ti.com

ISO6040, ISO6041, ISO6042

SLLSFV3B – DECEMBER 2025 – REVISED AUGUST 2026

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ISO6042HDFPR Datasheet(PDF) 33 Page - Texas Instruments

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