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.
ISO732x utilize single-ended TTL-logic switching technology. Its supply voltage range is from 3 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 (i.e. μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard.
ISO7321 can be used with Texas Instruments' mixed signal micro-controller, digital-to-analog converter, transformer driver, and voltage regulator to create an isolated 4-20 mA current loop.
|At VCC1 = VCC2 = 5 V
||At VCC1 = VCC2 = 5 V
|At VCC1 = VCC2 = 3.3 V
||At VCC1 = VCC2 = 3.3 V
ICC1 and ICC2 are typical supply currents measured in mA, f is data rate measured in Mbps, CL is the capacitive load measured in pF.
Many applications in harsh industrial environment are sensitive to disturbances such as electrostatic discharge (ESD), electrical fast transient (EFT), surge and electromagnetic emissions. These electromagnetic disturbances are regulated by international standards such as IEC 61000-4-x and CISPR 22. Although system-level performance and reliability depends, to a large extent, on the application board design and layout, the ISO732x incorporate many chip-level design improvements for overall system robustness. Some of these improvements include:
Typical eye diagrams of ISO732x below indicate low jitter and wide open eye at the maximum data rate of 25 Mbps.