4 EVM Setup and Operation

This section describes the setup and operation of the EVM for parameter-performance evaluation. Figure 4-1 shows the basic setup of the EVM with two power supplies needed to evaluate isolator performance. Power this Evaluation Module by connecting voltages to Vcc1 and Vcc2 that are within the Recommended Operating Range in the ISO164x device datasheet. Typical voltage levels for the Vcc1 and Vcc2 supplies are 3.3V and 5V. Separate power supplies can be used to provide each supply voltage, and they do not need to have the same value. If both sides are to be evaluated at the same supply voltage, only one power supply is required and can power both sides of the EVM.

Although the ISO1640 and ISO1641 devices feature bidirectional data channels, the devices perform optimally when side 1 (SDA1 and SCL1) is connected to a single controller or node of an I2C network while side 2 (SDA2 and SCL2) is connected to the I2C bus. Please note that if the ISO1641 is used, providing an input signal on the SCL2 pin does not yield any changing output on SCL1: SCL1 remains pulled up to Vcc1

Table 4-1 shows the information on jumper configurations for basic tests