MCP3421 pinouts ?

Hello,

on my very little MCP3421 (SOT23-6) is no orientation mark or text visible. Is there a way to find the pinouts with some simple measurements ?

http://ww1.microchip.com/downloads/en/DeviceDoc/22003b.pdf

Is there any working Arduino code available to drive this ADC ?

wally

wally123: on my very little MCP3421 (SOT23-6) is no orientation mark or text visible. Is there a way to find the pinouts with some simple measurements ?

Apply 5V (or you could use 3V) through a 1K to 10K series resistor across the middle pins, and measure the voltage across those pins. If it's about 0.7V then you have the 5V applied the wrong way round. If it's close to 5V then you almost certainly have it the right way round, so you know which pin is Vss and which is Vdd.

There should be either a horseshoe indentation or pin 1 spot (as shown on the datasheet), or a groove or line down the pins 1-3 side.

thank you for this info ! now it works :)