Occupying a footprint of just 2.57×3.24 mm, the STA333IS single-chip digital audio system from STMicroelectronics furnishes up to 20 W of audio output power for use in space-constrained LCD and LED televisions, docking stations, and digital wireless speaker systems. With is wide operating voltage range of 4.5 V to 18 V, the device is also suitable for battery-operated equipment.
Part of ST’s Sound Terminal family, the STA333IS combines digital audio IP, such as FFX full flexible amplification, along with signal processing and power circuitry in a chip-scale package to create a high-power, single-chip solution for all-digital amplification. Its power section consists of four independent half-bridge stages. Two channels can be provided by two full bridges capable of delivering up to 10 W + 10 W of power.
The serial-audio-data input interface accepts all possible formats, including I2S. In addition to a 96-kHz internal-processing sampling rate with 24-bit precision, the STA333IS offers a 100-dB dynamic range and 100-dB signal-to-noise ratio (ternary PWM mode). Digital gain is adjustable from –80 dB to +48 dB in 0.5-dB steps, and input sampling rates are selectable from 32 kHz to 192 kHz.
Samples and production quantities of the STA333IS are available now in 5×5-bump, 0.5-mm pitch chip-scale packages, priced from $1.00 each for orders over 1000 units.
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