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STA321 数据表(PDF) 9 Page - STMicroelectronics |
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STA321 数据表(HTML) 9 Page - STMicroelectronics |
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9 / 157 page  STA321 Overview Doc ID 15351 Rev 3 9/157 1 Overview The STA321 is a single chip solution for digital audio processing applications of up to 4.0 channels. The STA321 is part of the Sound Terminal™ family that together with the digital power stage provides full digital audio streaming to the speaker, offering cost effectiveness, low energy dissipation and sound enrichment. The STA321 input section consists of two multiplexed stereo analog inputs, a 16-bit ADC and two independent digital input interfaces. The serial audio data input interface accepts all possible formats, including the popular I2S format. There is also a digital output interface fed by the ADC or by the digitally processed signals. The device has a full assortment of digital processing features. This includes sample rate converter, pre and post mixing, up to 13 programmable 28-bit biquads (EQ) per channel, bass/treble tone control and DRC. The embedded headphone detector indicates when headphone jack is inserted. The STA321 provides four independent channels of FFX™ output capabilities. In conjunction with a power device, it provides high-quality, high-efficiency, all digital amplification. The embedded CMOS bridge supplies up to 0.5 W into an 8- Ω load and 70 mW into a 16-Ω load for the headphones output. Figure 1. STA321 block diagram . V_BIAS VCM VHI VLO BICLKI1 LRCLKI1 SDATAI1 INL1 INR1 HPDET EAPWM4 EAPWM3 EAPWM2 EAPWM1 OUT1 OUT2 OUT3 PWM00 Bias Serial audio PGA PGA ADC HP detection Osc PLL Divider I2C interface interface 4-channel CMOS Serial audio interface FFX™ modulator headphone bridge SRC EAFTN EATSN EAPDN BICLKI2 LRCLKI2 SDATAI2 INL2 INR2 Serial audio interface |
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