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ISO7740FDWR Datasheet(PDF) 31 Page - Texas Instruments |
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ISO7740FDWR Datasheet(HTML) 31 Page - Texas Instruments |
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31 / 52 page  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 ISO774x devices are high-performance, 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 multi-controller driving applications and reduce power consumption. The ISO774x devices use single-ended CMOS-logic switching technology. The voltage range is from 2.25 V to 5.5 V for both supplies, VCC1 and VCC2. 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, μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard. 8.2 Typical Application Figure 8-1 shows the isolated serial peripheral interface (SPI). Vcc1 Vcc2 GND1 GND2 OUTA 16 14 13 2,8 9,15 4 XOUT XIN 5 6 2 MSP430 G2132 (14-PW) INA OUTD 1 3 4 5 6 ISO7741 DVss DVcc 0.1 F 0.1 F 0.1 F EN1 EN2 7 10 INB 12 11 OUTB OUTC IND 0.1 F INC SDI P1.4 SCLK SDO 9 6 7 8 4.7 k 4.7 k 28 VBD AGND CH0 1,22 CS 26 23 24 25 SCLK SDI 20 SDO ADS7953 CH15 5 BDGND 27 32 VA 31 REFP 2 MXO 3 AINP REFM 30 VIN GND VOUT 2 6 4 REF5025 1 F 10 F VS 0.1 F MBR0520L MBR0520L 1:1.33 0.1 F 3 1 D2 SN6501 D1 Vcc 4,5 2 GND 3.3 V IN EN GND OUT 4 1 2 3 TLV70733 10 F 3.3 VISO 10 F 22 F 16 Analog Inputs ISO-BARRIER Copyright © 2016, Texas Instruments Incorporated Figure 8-1. Isolated SPI for an Analog Input Module With 16 Input www.ti.com ISO7740, ISO7741, ISO7742 SLLSEP4J – MARCH 2016 – REVISED OCTOBER 2024 Copyright © 2024 Texas Instruments Incorporated Submit Document Feedback 31 Product Folder Links: ISO7740 ISO7741 ISO7742 |
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