MC145073

Features:

• Single Supply, Operating Voltage Range: 4.5 to 5.5 V
• 128x OSR SigmaDelta Modulator
• 82 dB Typical S/(N+D)
• Analog Inputs Can Be Driven as Either Differential or SingleEnded
• Clock Input May Be 128x, 256x, or 384x the Output Data Rate
• OutofRange Input Signals Internally Limited
• OnChip Digital Filters:
   5th Order Decimateby32 Comb Filter
   121 Tap Decimateby4 FIR Filter
• UserSelectable Digital Filter Transition Bands
• Versatile Serial Digital Output Interface:
   Configurable as Master or Slave
   Data Can Be Either Left or RightJustified
   Interfaces to DSP56000/1 and TMS320^TM DSPs
   I²S or Japanese Interface Compatibility
   CS5326 Compatible Interface Mode
   Multiplexing of Two MC145073s Accommodated
• PowerDown Mode Consumption: 2.0 mW
• Operating Temperature Range: 40 to 85


Pinout




Specifications

Symbol	Parameter	Value	Unit
VDD(A)	Analog Supply Voltage	6.0	V
VDD(D)	Digital Supply Voltage	6.0	V
Iin	DC Input Current, per Pin	± 20	mA
Vin(A)	Analog Input Voltage	VSS(A) 0.3 to VDD(A) + 0.3	V
Vin(D)	Digital Inputs	0.3 to VDD(D) + 0.3	V
Tstg	Storage Temperature	65 to + 150
TL	Lead Temperature, 1 mm from Case for 10 Seconds	260

* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should
   be restricted to the Operation Ranges, Analog Specifications, AC Electrical Characteristics, and DC
   Electrical   Characteristics tables.

This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to
this highimpedance circuit.


Description

The MC145073 is a dualchannel, 16bit A/D converter intended for use in digital audio systems such as multimedia, DCC, DAT, and professional audio applications. MC145073 uses a sigmadelta architecture consisting of a secondorder analog modulator and two stages of digital filtering for each channel. The analog modulator samples the input signal at 128 times the MC145073 output data rate, performs a singlebit quantization, and shapes the quantization noise towards higher frequencies. Subsequent onchip digital filters reject most of the shaped quantization noise and lower the data rate.

Sixteen unique userselectable interfacing modes make the MC145073 compatible with a multitude of application interfacing requirements. A single 5 V supply and a powerdown mode reduce power supply requirements, making the part attractive for portable applications.