AD1981BL

www.DataSheet4U.com AC ’97 SoundMAX® Codec AD1981BL AC ’97 2.3 COMPATIBLE FEATURES S/PDIF output, 20-bit data format, supporting 48 kHz and 44.1 kHz sample rates Integrated stereo headphone amplifier Variable sample rate audio External audio power-down control >90 dB dynamic range Stereo full-duplex codec 20-bit PCM DAC 3 analog line-level stereo inputs for line-in, AUX, and CD Mono line-level phone input Dual MIC input with built-in programmable preamplifier High quality CD input with ground sense Mono output for speakerphone or internal speaker power management support 48-lead LQFP package, Pb-free available VREFOUT VREF ENHANCED FEATURES Stereo MIC preamplifier support Built-in digital equalizer function for optimized speaker sound Full-duplex variable sample rates from 7040 Hz to 48 kHz with 1 Hz resolution Jack sense pins for automatic output switching Software-programmed VREFOUT output for biasing microphone and external power amplifier Low power 3.3 V operation for analog and digital supplies Multiple codec configuration options FUNCTIONAL BLOCK DIAGRAM XTL_OUT XTL_IN SPDIF AD1981BL MIC PREAMP MIC1 MIC2 PHONE_IN CD_L CD_GND CD_R AUX_L AUX_R LINE_IN_L LINE_IN_R CD DIFF AMP MS G VOLTAGE REFERENCE CODEC CORE SPDIF TX G G 2CMIC PCM L/R ADC RATE RECORD SELECTOR PLL G M 16-BIT Σ-∆ ADC
16-BIT
Σ-∆ ADC ID0 G M ID1 G G MONO_OUT M A MIX M M 16-BIT
 ADC Σ-∆ 16-BIT
Σ-∆ ADC AC '97 INTERFACE ADC AND DAC SLOT LOGIC RESET SYNC BIT_CLK EQ CORE STORAGE ...