Texas Instruments announced the TPA2011D1 the smallest Class-D audio amplifier for portable devices. It delivers 3.2-W, mono output and comes with an integrated digital-to-analog converter (DAC) noise filter that reduces codec noise by as much as 82 percent compared to devices without this feature.
- 3.2-W into 4 Ohms at 5 V produces 22 percent louder audio than competing solutions with no audible pop, a common challenge in portable devices.
- Integrated DAC noise filter reduces DAC out-of-band noise by 82 percent for clearer sound. The integrated image reject filter provides a low-pass cutoff frequency of 130 kHz, which could eliminate the need for an external filter on the inputs for lower component count and cost.
- The 1.2-mm x 1.2-mm, 0.4-mm pitch 9-ball wafer chip scale package (WCSP) saves board space and simplifies design.
- 1.5-mA quiescent current results in 50 percent lower power than other amplifiers for higher battery efficiency and improved battery life.
The TI TPA2011D1 is now avialable in a 1.2-mm x 1.2-mm, 0.4-mm pitch, 9-ball WCSP and is priced at $0.85 in 1,000-unit quantities.