18-Bit D/A Converters
AD1851Analog Devices   16-Bit/18-Bit, 16 3 FS PCM Audio DACs 
AD760Analog Devices   16/18-Bit Self-Calibrating Serial/Byte DACPORT 
AK4351AKM   18-bit 2-channel DAC 
AK4352AKM   Ultra low-power, 2V 18-bit DAC 94dB (96dB@3v) 

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