TAS2552: Dears ，I need an DAC audio amp , input is IIS ,output analog signal for Speaker ,Speaker is 8ohm,2W, powered by dc 4V . if there any device advise recommended ? easy to use ,High performance , many thanks ~

Hi, Andrew,

The TAS2552 would be a good option for your requirements.

We have other options. However, the power supply may be an issue to reach the 2W output power. You would need to decrease the output power or increase the power supply to around 5V. Please take a look at the devices below:

- TLV320DAC3100. It supports all the features that you require. However, in order to reach the 2W for an 8ohms load, the SPKVDD must be increased to 5.5V. 

http://www.ti.com/lit/ds/symlink/tlv320dac3100.pdf

- TAS2505. It also supports the power level that you mentioned, but it also requires a higher SPKVDD power supply (5.5V).

http://www.ti.com/lit/ds/symlink/tas2505.pdf

- TAS2770. It may also reach 2W, but VBAT voltage must be increased to around 5V.

http://www.ti.com/lit/ds/symlink/tas2770.pdf

Best regards,
Luis Fernando Rodríguez S.