I2C Isolator 2 click

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  • MIKROE-2609
  • MIKROE-2609
I2C Isolator 2 click  provides I2C lines and power isolation for slave devices. It carries...more
Product information "I2C Isolator 2 click"
I2C Isolator 2 click provides I2C lines and power isolation for slave devices. It carries the ADM3260 dual I2C isolator with an integrated DC-to-DC converter. I2C Isolator 2 click is designed to run on either 3.3V or 5V power supply. The click communicates with the target microcontroller over an I2C interface with additional functionality provided by the PWM pin on the mikroBUS™ line.

ADM3260 features

The ADM3260 is a hot swappable digital and power isolator with two nonlatching, bidirectional communication channels, supporting a complete isolated I2C interface, and an integrated isolated dc-to-dc converter, supporting up to 150 mW of isolated power conversion.

The bidirectional I2C channels eliminate the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers. 

How it works

The screw terminal on the board can be connected to I2C and power connections of an I2C slave device.


Type Isolator
Applications Isolated I2C, SMBus, and PMBus interfaces, multilevel I2C interfaces, central office switching, telecommunication and data communication equipment, etc
On-board modules ADM3260 dual I2C isolator
Key Features up to 150 mW output power
Key Benefits integrated DC-to-DC converter
Interface GPIO,I2C
Peripherals include two pars of screw terminals
Input Voltage 5V,5V
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)

Pinout diagram

This table shows how the pinout on I2C Isolator 2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
  NC 1 AN PWM 16 PDIS Power disable
  NC 2 RST INT 15 NC  
  NC 3 CS TX 14 NC  
  NC 4 SCK RX 13 NC  
  NC 5 MISO SCL 12 SCL I2C Clock
  NC 6 MOSI SDA 11 SDA I2C Data
Power supply +3.3V 7 3.3V 5V 10 +5V Power supply
Ground GND 8 GND GND 9 GND Ground

Jumpers and Settings

Designator Name Default Position Default Option Description
JP1 VIO SEL. Left 3V3 Power Supply Voltage Selection 3V3/5V, left position 3V3, right position 5V
JP2 VIO ISO Left 3V3 Isolated Power Supply Voltage Selection 3V3/5V, left position 3V3, right position 5V

Buttons and LEDs

Designator Name Type Description
CN1   SCREW TERMINAL VCC, GND isolated connection.
CN2   SCREW TERMINAL SCL SDA isolated connection


Code snippet

The following code snippet is an example of a read sequence using I2C.

1 I2C1_Start();              // issue I2C start signal
2 I2C1_Wr(0xA2);             // send byte via I2C  (device address + W)
3 I2C1_Wr(2);                // send byte (data address)
4 I2C1_Repeated_Start();     // issue I2C signal repeated start
5 I2C1_Wr(0xA3);             // send byte (device address + R)
6 LATB = I2C1_Rd(0);         // Read the data (NO acknowledge)
7 I2C1_Stop();               // issue I2C stop signal


 mikroBUS™ Standard specification 

 ADM3260 datasheet

 I2C Isolator 2 click schematic

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