Hi all.
Trying to feed a dynamic microphone on differential mode with no preamplification to a 8002 power amplifier chip, I have doubts which gain setting resistors are to be tailored and the proper way to manage the chip gain.
I can only guess the 32Ω microphone level inputted differentially at 'Audio in', perhaps 1mV.
Goal is to get maximum stable gain to output ~ 0.5W for a RL = 4Ω. Supply Vdd is 3V. Voice range only.
The internal power amplifier for Vout2 has a fixed gain of 1; only inverts the Vout1 signal.
Do both input resistors at INN and INP have to be same value ?
Does the resistor at BP and the Rf at top have to be the same value ?
Any considerations I should be aware of ?
Trying to feed a dynamic microphone on differential mode with no preamplification to a 8002 power amplifier chip, I have doubts which gain setting resistors are to be tailored and the proper way to manage the chip gain.
I can only guess the 32Ω microphone level inputted differentially at 'Audio in', perhaps 1mV.
Goal is to get maximum stable gain to output ~ 0.5W for a RL = 4Ω. Supply Vdd is 3V. Voice range only.
The internal power amplifier for Vout2 has a fixed gain of 1; only inverts the Vout1 signal.
Do both input resistors at INN and INP have to be same value ?
Does the resistor at BP and the Rf at top have to be the same value ?
Any considerations I should be aware of ?