Advanced 1-Bit BiCMOS Dual 18-Bit DIGITAL-TO-ANALOG CONVERTER
DESCRIPTION
The PCM67 and PCM69A dual 18-bit DAC are low cost, dual output 18-bit BiCMOS digital-to-analog converters utilizing a novel architecture to achieve excellent low level performance. By combining a conventional thin-film R-2R ladder DAC, a digital offset technique with analog correction and an advanced one-bit DAC using first order noise shaping technique, the PCM67 and PCM69A achieve high resolution, minimal glitch, and low zero-crossing distortion. PCM67 digital offset occurs at bit 9, making it ideal for high-performance CD players. PCM69A digital offset occurs at bit 4, making it an excellent choice for digital musical instruments and audio DSP. Both PCM67 and PCM69A operate from a single +5V supply. The low power consumption and small size (16- pin PDIP or 20-pin SOIC) make these converters ideal for a variety of digital audio applications.
FEATURES
? 18-BIT RESOLUTION DUAL AUDIO DAC
? EXCELLENT THD PERFORMANCE: 0.0025% (–92dB) at F/S, K Grade 1.0% (–40dB) at –60dB, K Grade
? HIGH S/N RATIO: 110dB typ (IHF-A)
? DUAL, CO-PHASE
? SINGLE SUPPLY +5V OPERATION
? LOW POWER: 75mW typical
? CAPABLE OF 16X OVERSAMPLING
? AVAILABLE IN SPACE SAVING 16-PIN DIP OR 20-PIN SOIC
? OPERATING TEMP RANGE: –25°C to +85°C
? EXTREMELY LOW GLITCH ENERGY
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