STA538

STA538 2 x 1.3 W class-D amplifier with analog or digital input 2.0 multichannel digital audio processor with FFX Features ■ ■ ■ ■ ■ ■ ■ Up to 96 dB dynamic range Sample rates from 8 kHz to 192 kHz FFXTM class-D driver 1.5 V to 1.95 V digital power supply 1.5 V to 3.6 V analog power supply 18-bit audio processing and class-D FFXTM modulator Digital volume control: – +36 dB to 105 dB in 0.5 dB steps – Software volume update Individual channel and master gain/attenuation Automatic invalid input detect mute 2-channel I2S input/output data interface Digitally controlled POP-free operation Input and output channel mapping 250 mΩ output CMOS Rdson > 90% efficiency 2 x 1.3 W (10% THD) on 4 Ω at 3.6 V 2 x 0.7 W (10% THD) on 8 Ω at 3.3 V Stereo headphone plus mono speaker application: – 50 mW stereo into 32 Ω headphone, 1.2 W mono into 4 Ω speaker at 3.3 V – 100 mW stereo into 16 Ω headphone, 1.2 W mono into 4 Ω speaker at 3.3 V VFQFPN52 TFBGA48 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Order codes Part number STA538B STA538Q Package TFBGA48 (tube) VFQFPN52 (tube) January 2007 Rev 1 1/59 www.st.com 1 http://www.Datasheet4U.com Contents STA538 Contents 1 2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Connection diagrams and pin descriptions . . . . . . . . . . . . . . . . . . . . . . 6 2.1 TFBGA48 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.1 2.1.2 2.1.3 Connection diagram . . ...