SLLU322A September   2020  – October 2022 ISO1640

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Overview
  5. 3Pin Configurations of Isolated I2C Transceivers
  6. 4EVM Setup and Operation
  7. 5Bill of Materials
  8. 6EVM Schematic and PCB

EVM Setup and Operation

CAUTION:

Note that this EVM is for operating-parameter performance evaluation only and not designed for isolation voltage testing. Any voltage applied above the 5.5-V maximum recommended operating voltage of the isolators may damage the EVM.

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.

GUID-20200924-CA0I-ZSTF-2GMZ-LMBV0TRJ3VVJ-low.gif Figure 4-1 Basic EVM Operation

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

Table 4-1 Jumper Descriptions
Label Description
U1 ISO164xD,by default populated as ISO1640D
U2 ISO1640DW/ISO1641DW,by default not populated
P1 2-pin jumper for Side 1 power supply, Vcc1
P2 2-pin jumper for Side 2 power supply, Vcc2
P3 3-pin jumper to Vcc1, GND1, and SDA1
P4 3-pin jumper to Vcc2, GND2, and SDA2
P5 3-pin jumper to Vcc1, GND1, and SCL1
P6 3-pin jumper to Vcc2, GND2, and SCL2