Si470x breakout on 5V

Si470x breakout on 5V#201321

By BigPilot - Fri Dec 07, 2018 10:18 am

- Fri Dec 07, 2018 10:18 am #201321

I noticed that most projects using the Si470x tuner breakout are using 3.3V to drive the board. However, in the Si4702 datasheet I noticed that it can be powered by 5V. Is it safe to use it with a 5V microcontroller such as the Teensy 2.0 (AVR) I'm using?

Re: Si470x breakout on 5V#201334

By BigPilot - Sat Dec 08, 2018 12:41 am

- Sat Dec 08, 2018 12:41 am #201334

Also, the schematic says: '2.7V < VCC < 3.3V', implying that the board cannot be powered by 5V.

Re: Si470x breakout on 5V#201336

By BLH - Sat Dec 08, 2018 4:49 am

- Sat Dec 08, 2018 4:49 am #201336

I would say no.
Look at the data sheet again. VD and VA can be 5 volts. The VIO voltage is rated 1.5 to 3.6 volts.
The schematic shows VD,VA and VIO are all on one voltage input connection.