AD1866

a FEATURES Dual Serial Input, Voltage Output DACs Single +5 Volt Supply 0.005% THD+N Low Power –50 mW 115 dB Channel Separation Operates at 8 ؋ Oversampling 16-Pin Plastic DIP or SOIC Package APPLICATIONS Multimedia Workstations PC Audio Add-In Boards Portable CD and DAT Players Automotive CD and DAT Players Noise Cancellation V L LL DL CLK 1 2 3 4 5 6 7 8 Single Supply Dual 16-Bit Audio DAC AD1866* FUNCTIONAL BLOCK DIAGRAM AD1866 16 15 14 V REF 16-BIT SERIAL REGISTER 13 12 VREF 11 10 16-BIT DAC 9 VBL VS VOL NRL AGND NRR VOR VS 16-BIT DAC 16-BIT SERIAL REGISTER DR LR DGND VBR PRODUCT DESCRIPTION The AD1866 is a complete dual 16-bit DAC offering excellent performance while requiring a single +5 V power supply. It is fabricated on Analog Devices’ ABCMOS wafer fabrication process. The monolithic chip includes CMOS logic elements, bipolar and MOS linear elements and laser trimmed, thinfilm resistor elements. Careful design and layout techniques have resulted in low distortion, low noise, high channel separation and low power dissipation. The DACs on the AD1866 chip employ a partially segmented architecture. The first three MSBs of each DAC are segmented into 7 elements. The 13 LSBs are produced using standard R-2R techniques. The segments and R-2R resistors are laser trimmed to provide extremely low total harmonic distortion. The AD1866 requires no deglitcher or trimming circuitry. Each DAC is equipped with a high performance output amplifier. These amplifiers achieve fast s...