STA333ML STMicroelectronics

STA333ML 2-channel microless high-efficiency digital audio system Sound Terminal Features PowerSSO-36 Wide supply voltage range (4.5 - 20 V) with exposed 2 x 20 W into 8 at V = 18 V pad down (EPD) CC PowerSSO-36 exposed pad package 2 channels of 24-bit DDX Description 100-dB SNR and dynamic range Selectable 32 kHz to 48 kHz input sample STA333ML is a single die embedding digital audio rates processing and high-efficiency power amplification, capable of operating without the aid Automatic zero-detect mute of an external microcontroller. Automatic invalid input detect mute The STA333ML is part of the Sound Terminal 2 2-channel I S input data interface family that provides full digital audio streaming to Selectable clock input ratio (256 or 364 * fs) the speakers and offers cost effectiveness, low power dissipation and sound enrichment. Max power correction for lower full power 96 kHz internal processing sample rate, 24-bit The STA333ML combines a unique 24-bit DDX precision digital class-D ternary modulator together with an extremely low R stereo power DMOS stage. dsON Thermal overload and short-circuit protection The latter is capable of a total output power of embedded 2 x 20 W with outstanding performance in terms Filterless configuration capable of efficiency (>90 %), THD, SNR and EMI. The microless feature allows its use in low-cost Applications applications (cradle, digital speakers, audio LCD terminals) where no microcontroller is needed. DVD The serial audio data interface accepts the Cradle 2 universally used I S format. Basic features, like 2 oversampling clock, gain, I S format can be set Digital speaker using a minimal number of selection pins. Wireless speaker cradle STA333ML is self-protected against thermal overload, overcurrent, short-circuit and overvoltage conditions. The fault condition is also signalled on an external pin (INT LINE) for specific requirements. Table 1. Device summary Order code Package Packaging STA333ML PowerSSO-36 EPD Tube STA333ML13TR PowerSSO-36 EPD Tape and reel February 2010 Doc ID 13177 Rev 5 1/20 www.st.com 20Contents STA333ML Contents 1 Block diagram 3 2 Pin description . 4 3 Electrical specifications 6 3.1 Absolute maximum ratings . 6 3.2 Thermal data . 6 3.3 Recommended operating condition 6 3.4 Electrical specifications - digital section . 7 3.5 Electrical specifications - power section . 7 3.6 Power on sequence 9 3.7 Test circuits . 9 4 Functional description 10 4.1 Serial audio interface protocols 10 4.2 Fault detect recovery bypass 11 4.3 Zero-detect mute enable . 11 4.4 Fade-in/out feature 11 4.5 Oversampling selector . 11 4.6 Gain selector 11 4.7 Power-down function 11 5 Applications . 12 5.1 Applications schematic . 12 5.2 Internal voltage reference . 13 5.3 PLL filter schematic . 13 5.4 Typical output configuration . 14 6 Package thermal characteristics 16 7 Package mechanical data 17 8 Revision history . 19 2/20 Doc ID 13177 Rev 5