hamid2000
Junior Member level 3
Hi,
I obeyed all recommendations in PGA3210 data sheet to design and fabricate my Audio Controller board; there is a serious problem with PGA3210!
When circuit shut downs, there is a bad overshoot and discharging curve on VoutL or VoutR (pin # 14,11)... It is very similar to simple RC-discharge circuit with time constant t=R*C and occurs abut 2 seconds after power down. I disconnected all related peripheral circuit elements and focused on just PGA2310 and the problem exists yet...I checked Power Supply section, outputs, inputs, Microcontroller code and etc. This failure also occurs with/without connecting input Audio signal to VinL ,VinR(pin #16,9 of PGA3210.
I could not find any related document in forums or TI website.
I would be so thankful to hear from you.
regards.
Hamid
I obeyed all recommendations in PGA3210 data sheet to design and fabricate my Audio Controller board; there is a serious problem with PGA3210!
When circuit shut downs, there is a bad overshoot and discharging curve on VoutL or VoutR (pin # 14,11)... It is very similar to simple RC-discharge circuit with time constant t=R*C and occurs abut 2 seconds after power down. I disconnected all related peripheral circuit elements and focused on just PGA2310 and the problem exists yet...I checked Power Supply section, outputs, inputs, Microcontroller code and etc. This failure also occurs with/without connecting input Audio signal to VinL ,VinR(pin #16,9 of PGA3210.
I could not find any related document in forums or TI website.
I would be so thankful to hear from you.
regards.
Hamid