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ISO6431FDFPRQ1 Datasheet(PDF) 28 Page - Texas Instruments |
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ISO6431FDFPRQ1 Datasheet(HTML) 28 Page - Texas Instruments |
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28 / 47 page  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 ISO643x-Q1 devices are high-performance, low power, triple-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 ISO643x-Q1 devices use single-ended CMOS-logic switching technology. The supply voltage range is from 2.25V 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 ISO643x-Q1 VCC1 with 3.3V (which is within 2.25V to 5.5V) and VCC2 with 5V (which is also within 2.25V 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 3 Channel Typical Application shows an ADC application. VCC1 VCC2 GND1 GND2 NC 16 11 14 2, 8 9, 15 INA OUTC 1 6 3 4 5 ISO6431-Q1 VSS VDDIO EN1 EN2 7 10 INB 13 12 OUTA OUTB INC SPI_SDI SPI_CLK SPI_SDO +VBD AGND CH0 CS SCLK SDI SDO ADS7953-Q1 CH15 BDGND +VA REFP MXO AINP REFM VIN GND VOUT REF5025A-Q1 VS MBR0520L MBR0520L 1:1.33 D2 SN6501-Q1 D1 VCC GND 3.3V IN EN GND OUT TPS76333-Q1 3.3VISO 16 Analog Inputs ISO Barrier 0.1µF 0.1µF NC 4.7kΩ 4.7kΩ MSPM0 C2000 AM2xxx TM4Cxx Figure 9-1. 3 Channel Typical Application ISO6431-Q1 SLVSJ21 – JUNE 2026 www.ti.com 28 Submit Document Feedback Copyright © 2026 Texas Instruments Incorporated Product Folder Links: ISO6431-Q1 |
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