Analog Devices AD1862
The AD1862 is a monolithic 20-bit digital audio DAC. Each device provides a 20-bit DAC, 20-bit serial-to-parallel input register and voltage reference. The digital portion of the AD1862 is fabricated with CMOS logic elements that are provided by Analog Devices’ BiMOS II process.FEATURES
120 dB Signal-to-Noise Ratio 102 dB D-Range Performance ؎ 1 dB Gain Linearity ؎ 1 mA Output Current 16-Pin DIP Package 0.0012% THD + NAPPLICATIONS
High Performance Compact Disc Players Digital Audio Amplifiers Synthesizer Keyboards Digital Mixing Consoles High Resolution Signal Processing –VS –VS 1 2 Ultralow Noise 20-Bit Audio DAC AD1862* FUNCTIONAL BLOCK DIAGRAM VOLTAGE REFERENCE 16 +VS 15 NR2 14 ADJ 13 NR1 INPUT & DIGITAL OFFSET 12 AGND 20-BIT DAC 11 IOUT 10 RF 9 DGND TRIM 3 +VL 4 CLK 5 LE 6 DATA 7 –VL 8 AD1862 PRODUCTDESCRIPTION
The analog portion of the AD1862 is fabricated with bipolar and MOS devices as well as thin-film resistors. New design, layout and packaging techniques all combine to produce extremely high performance audio playback. The design of the AD1862 incorporates a digital offset circuit which improves low-level distortion performance. Low stress packaging techniques are used to minimize stress-induced parametric shifts. Stress-sensitive circuit elements are located in die areas which are least affected by packaging stress.