AD1847
FEATURES
Single-Chip Integrated ⌺⌬ Digital Audio Stereo Codec Supports the Microsoft Windows Sound System- Multiple Channels of Stereo Input Analog and Digital Signal Mixing Programmable Gain and Attenuation On-Chip Signal Filters Digital Interpolation and Decimation Analog Output Low-Pass Sample Rates from 5.5 k Hz to 48 k Hz 44-Lead PLCC and TQFP Packages Operation from +5 V Supplies Serial Digital Interface patible with ADSP-21xx Fixed-Point DSP
I S A B U S
Serial-Port 16-Bit Sound Port Stereo Codec AD1847
ASIC AD1847 DSP
Figure 1. Example System Diagram
External circuit requirements are limited to a minimal number of low cost support ponents. Anti-imaging DAC output filters are incorporated on-chip. Dynamic range exceeds 70 d B over the 20 k Hz audio band. Sample rates from 5.5 k Hz to 48 k Hz are supported from external crystals. The Codec includes a stereo pair of ∑∆ analog-to-digital converters (ADCs) and a stereo pair of ∑∆ digital-to-analog converters (DACs). Inputs to the ADC...
