Quad audio amp offers spatial array processing

Quad audio amp offers spatial array processing

Simplifying the design and programming of spatially enhanced audio systems for multispeaker portable products, the LM48901 quad Class D spatial array features an edge-rate-controled PWM architecture. The chip aids tablet/laptop computer audio that is hindered by tightly spaced speakers and audio that lacks clarity and depth. The chip, along with companion software, solves this problem with easy-to-use audio effect programming that converts a small soundstage into an immersive sound experience with two to 16 speakers.

The IC also has a spatial-processing DSP, four Class D amplifiers, an 18-bit stereo A/D converter, a PLL, and I2 S and I2 C interfaces. Output power is 1.7 W typ with RL = 8 Ω and THD+N ≤ 10%. The chip’s THD+N is 0.06% typ and PSRR at 217 Hz is 71 dB typ. Shutdown current is just 1 μA typ. ($2.50 ea/1,000 — available now.)

By Jim Harrison

Texas Instruments , Dallas , TX
Information 800-477-8924
www.ti.com