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STEVAL-CCA018V1 Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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STEVAL-CCA018V1 Scheda tecnica(HTML) 1 Page - STMicroelectronics |
1 / 4 page Data brief For further information contact your local STMicroelectronics sales office. October 2009 Doc ID 16593 Rev 1 1/4 4 STEVAL-CCA018V1 Single-supply stereo digital audio line driver based on the TS4657 Features ■ Power supply range: 3 V to 5.5 V ■ Audio line output: 2.2 VRMS for entire VCC range ■ 16 to 24-bit audio data format stereo DAC, 32 to 48 kHz sample rate ■ I2S, right or left justified compatible digital audio interface ■ 95 dB SNR A-weighted at 48 kHz, VCC = 5 V ■ 7.4 mA current consumption at VCC = 3 V, full operation ■ Internal negative power supply to ensure ground-referenced, cap-less outputs ■ No external capacitor needed for the negative power supply generation ■ Integrated structure to suppress pop and click noise ■ Standby mode active low ■ RoHS compliant Description The STEVAL-CCA018V1 demonstration board is designed provide a platform for evaluating the performance of the TS4657 stereo digital-to analog-converter (DAC). The TS4657 integrates a high-performance audio line driver capable of generating a 2.2 VRMS output level from a single 3.0 to 5.5 V supply. A single supply is sufficient for the digital and analog parts of the circuit, eliminating the need for external regulators. The TS4657 is a low consumption device, with only 22 mW of power dissipation at 3.0 V power supply during full operation. A 16-bit multi-bit sigma-delta DAC is used, operating at 256xFs with over sampling digital interpolation filters. The digital audio data can be 16 to 24-bits long and sample rates from 32 to 48 kHz are supported. The output stage signal is ground-referenced by using an internal self-generated negative power supply, so bulky external output coupling capacitors are not necessary. STEVAL-CCA018V1 www.st.com |
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