On 11/2/20 12:10 PM, Leif M wrote:
Do they really burn out at around 10mW, That is not much. I plan to play with an amplifier putting out more than that. I'll use an attenuator so mine is safe but accidents happen.
well, the input circuit for port 2 has a 56 ohm resistor across it (part of a 50 ohm input attenuator) -
It's a fairly small chip, but it can probably take 50 mW without too much trouble for a short time. (0402 = 62 mW, 0603 = 100mW, 0805=125 mW) (see )
Put 10 W into it, and the resistor probably vanishes.
The attenuator is about 20 dB (10:1 voltage ratio)
The input to the mixer would be the next thing, but you'd have to swing past the supply a fair amount, which would be about 1.75V rms..
So blowing up the mixer would be 17V input.. the resistor will die first
If you put reverse power into Port 1, the same sort of analysis applies, you've got the resistor bridge, and ultimately the Si53541 output. Again, probably one of those "don't swing past the supplies".
There's about 50 ohms to ground, spread across multiple resistors.
