Multiple MCP4922, but the last is clipping the value.

[urbanpixellab]

Hi i have 4 SPI DACs MCP4922 running on a Teensy 3.2. The first three are working fine (Output is till 5V) but the last one is clipping the output at around 4.2V. I measured the vdd and vref on the last mcp and they are fine, like the others. As vref and vdd i am using the vin(5v) from the Teensy.
Any ideas what this could be?

 

[urbanpixellab]

I solved it after researching and testing today.
I found on the page from Paul (https://www.pjrc.com/author/paul/page/3/) to add a pull up resistor of 10k to cs. This did the trick now the last one isn't clipping any more.

 

[PaulStoffregen]

Glad that old SPI article helped.