TI introduces the smallest Class-D audio amplifier for portable devices
Texas Instruments introduced a 3.2-W, mono Class-D audio amp 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. The TPA2011D1’s integrated noise filter could eliminate the need for an external filter on the inputs, reducing component count and cost. The Class-D amplifier’s 1.2-mm x 1.2-mm package size makes it 25 percent smaller than competing devices, further saving space for designers who are looking for 0.4-mm pitch for next-generation mobile phones and portable media players.
Key features and benefits of the TPA2011D1
· 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.
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