PCM1727

® 49% PCM 1 FPO 727 E PCM1727 Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE DUAL PLL TM FEATURES q ACCEPTS 16-, 20-, OR 24-BIT INPUT DATA q COMPLETE STEREO DAC: Includes Digital Filter and Output Amp q DYNAMIC RANGE: 92dB q MULTIPLE SAMPLING FREQUENCIES: fS = 44.1kHz, 48kHz, 96kHz q PROGRAMMABLE DUAL PLL CIRCUIT: 27MHz Master Clock Input q GENERATED SYSTEM CLOCK SCKO1: 33.8688MHz SCK02: 384fS SCK03: 768fS (44.1k/48kHz) 384fS (96kHz) q NORMAL OR I2S DATA INPUT FORMATS q SELECTABLE FUNCTIONS: Soft Mute, Analog Output Mode Digital Attenuator (256 Steps) Digital De-emphasis q +5V SINGLE POWER SUPPLY DESCRIPTION The PCM1727 is a complete low cost stereo audio digital-to-analog converter (DAC) with a dual phaselocked loop (PLL) circuit included. PLL-1 derives a fixed 33.8688MHz (768fS, fS = 44.1kHz) system clock (SCKO-1), and PLL-2 derives both the 384fS (fS = 44.1k/48k/96kHz) system clock (SCKO-2), and the 768fS (fS = 44.1k/48kHz)/384fS (fS = 96kHz) system clock (SCKO-3) from an external 27MHz reference frequency. The DAC contains a 3rd-order ∆Σ modulator, a digital interpolation filter, and an analog output amplifier. The PCM1727 can accept 16-, 20-, or 24-bit input data in either normal or I2S formats. The digital filter performs an 8X interpolation function and includes selectable features such as soft mute, digital attenuation and digital de-emphasis. The PCM1727 is ideal for applications which combine compressed audio and video data such as DVD, DVD Audio wi...