Connect mcp3551

I have a MCP3551 (22 bits adc) and it is equipped with the following connections to be interfaced with an Arduino - SCK - SDO/!RDY - !CS. Has someone used this before and can you tell me with library and which output to use?

Hey ssijbesma,

Maybe this link will help:

Good luck!

Problem solved: :wink:

This example demonstrate the usage of the A/D Converter with MCP3551 library.
#include <MCP3551.h>
#include <SPI.h>

const int MCPPin = 10;
Connect SCK to CLK (pin 13 on Uno)
Connect SDO/!RDY to MOSI (pin 12 on Uno)
Connect !CS to MCPPIN (pin 10 on Uno)

//Create an instance of MCP3551 connected to the MCPPIN
MCP3551 myADC(MCPPin);

void setup() {


void loop() {

ssijbesma Can you share that library?