MC145073

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145073/D Product Preview Dual 16-Bit Stereo Audio Sigma-Delta ADC CMOS The MC145073 is a dual–channel, 16–bit A/D converter intended for use in digital audio systems such as multimedia, DCC, DAT, and professional audio applications. It uses a sigma–delta architecture consisting of a second–order analog modulator and two stages of digital filtering for each channel. The analog modulator samples the input signal at 128 times the output data rate, performs a single–bit quantization, and shapes the quantization noise towards higher frequencies. Subsequent on–chip digital filters reject most of the shaped quantization noise and lower the data rate. Sixteen unique user–selectable interfacing modes make the MC145073 compatible with a multitude of application interfacing requirements. A single 5 V supply and a power–down mode reduce power supply requirements, making the part attractive for portable applications. Single Supply, Operating Voltage Range: 4.5 to 5.5 V 128x OSR Sigma–Delta Modulator 82 dB Typical S/(N+D) Analog Inputs Can Be Driven as Either Differential or Single–Ended Clock Input May Be 128x, 256x, or 384x the Output Data Rate Out–of–Range Input Signals Internally Limited On–Chip Digital Filters: 5th Order Decimate–by–32 Comb Filter 121 Tap Decimate–by–4 FIR Filter User–Selectable Digital Filter Transition Bands Versatile Serial Digital Output Interface: Configurable as Master or Slave Da...