PCM1750U

® PCM1750P PCM1750U Dual CMOS 18-Bit Monolithic Audio ANALOG-TO-DIGITAL CONVERTER FEATURES q DUAL 18-BIT LOW-POWER CMOS AUDIO A/D CONVERTER q FAST 4.5µs MIN CONVERSION TIME INCLUDING S/H q VERY LOW MAX THD+N: –88dB Without External Adjust q COMPLETE WITH INTERNAL REFERENCE AND DUAL S/H FUNCTION q TWO CO-PHASE SAMPLED, ±2.75V AUDIO INPUTS q CAPABLE OF 4X PER CHANNEL OVERSAMPLING RATE q RUNS ON ±5V SUPPLIES AND DISSIPATES 300mW MAX q COMPACT 28-PIN PLASTIC DIP OR SOIC DESCRIPTION The PCM1750 is a low cost, dual 18-bit CMOS analog-to-digital converter optimized for dynamic signal applications. The PCM1750 features true co-phased inputs with an internal sample/hold function for each channel. The PCM1750 also comes complete with an internal reference. Total power dissipation is less than 300mW max using ±5V voltage supplies. Low maximum Total Harmonic Distortion + Noise (–88dB max) is 100% tested. The very fast PCM1750 is capable of 4X x audio bandwidth oversampling rates on both input channels simultaneously, providing greater freedom to designers in selecting input anti-aliasing filters. PCM1750 outputs serial data in a format that is compatible with many digital filter chips and comes packaged in a space saving 28-pin plastic DIP or SOIC. MSB Adj Left Offset Adj Left S/H VIN Left S OUT Left Reference CDAC Left Comp Latch Shift Register Control Logic SOUT Right VIN Right Offset Adj Right MSB Adj Right Comp S/H CDAC Right Reference Latch 18-Bit SAR 18-Bit SAR Clock Convert ...