We use TDA7088 to create a auto-tuning FM radio. The data will be found on this website:
http://www-us6.semiconductors.com/pip/tda7088t

When it is searching the suitable frequency, the voltage will change on pin 16. Therefore, we want to use 8051 to measure the variable voltage on pin 16 and then displays the result on LCD.

We try to use a multi-meter to measure it but the result will be unstable when the lead touch the pin 16.

If anybody can solve this problem, please reply us.