Other Parts Discussed in Thread: OPA1612, OPA1622, INA1620
Dear TI Team,
I want to clarify some points with PCM1794A DAC typical connection given in Figure 23 and 24 of the datasheet and ask some other related questions.
1. If I want to pull down pins 1,2,3,10,11,12 to ground, do I have to tie them with resistor or it can be tied to ground directly? What resistor nominals should be used if tied with resistor? What pins are allowed to be tied directly and which should be tied with resistor?
2. In Figure 23 and 24 of the named datasheet, DAC outputs are connected to "Differential to Single Converter With Low-Pass Filter" inputs directly and there's no resistor or simple RC filter installed in between them. Is it OK to follow the schematic provided in datatsheet ?
3. In SBAA333, SBOA237 and TIDU672c documents given some usefull schematics which use OPA1612 and OPA1622 opamps for I/V and Differential to SE Stages. My question is if I use those schematics and opamps recomended, will they provide sufficient output power to feed the 16-32 Ohm headphones or I will have to add another stage after OPA1622 as an amplifier?